CN116671964B - Pressure correction method of elastic detection probe, elastic detection probe and system - Google Patents
Pressure correction method of elastic detection probe, elastic detection probe and system Download PDFInfo
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- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 110
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/485—Diagnostic techniques involving measuring strain or elastic properties
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/42—Details of probe positioning or probe attachment to the patient
- A61B8/4245—Details of probe positioning or probe attachment to the patient involving determining the position of the probe, e.g. with respect to an external reference frame or to the patient
- A61B8/4254—Details of probe positioning or probe attachment to the patient involving determining the position of the probe, e.g. with respect to an external reference frame or to the patient using sensors mounted on the probe
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
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Abstract
The invention relates to the technical field of elastography, in particular to a pressure correction method of an elastic detection probe, the elastic detection probe and a system, wherein the method comprises the steps of obtaining a current pressure measurement value and a current rotation angle of the elastic detection probe, wherein the current pressure measurement value is measured based on a pressure sensor arranged in the elastic detection probe, and the current pressure measurement value and the contact pressure between the elastic detection probe and the tissue to be detected; and correcting the current pressure measured value based on the current rotation angle and the pressure idle value to determine a target pressure measured value of the elastic detection probe. And correcting the current pressure measured value by using the current rotation angle and the pressure idle value to finally obtain a target pressure measured value after pressure correction, thereby improving the accuracy of pressure value detection and further ensuring the accuracy of an elastic measurement result.
Description
Technical Field
The invention relates to the technical field of elastic imaging, in particular to a pressure correction method of an elastic detection probe, the elastic detection probe and a system.
Background
The elastography technology has been widely used in various fields, and in clinical application, the obtained elastography information of biological tissues is usually converted into pseudo-color images used by doctors, so that the doctors can judge the mechanical properties of the tissues through the pseudo-color images, and then the elastography detection result of the tissues is determined according to the hardness of the tissues. In the elastography process, a detector (e.g., a doctor) holds a probe to perform elastography scan, and needs to apply stable and proper pressure, so that the measurement process is unstable due to too small pressure, and the measured object is uncomfortable due to too large pressure.
Currently, the application of this pressure depends on the experience of the doctor, and manual operation cannot guarantee that the applied pressure is within a stable range, and the accuracy of the obtained detection result is low.
Disclosure of Invention
In view of the above, the embodiments of the present invention provide a method for calibrating an elastic detection probe, and a system thereof, so as to solve the problem of low accuracy of an elastic detection result.
According to a first aspect, an embodiment of the present invention provides a pressure correction method of an elastic detection probe, including:
Acquiring a current pressure measurement value and a current rotation angle of the elastic detection probe, wherein the current pressure measurement value is measured based on a pressure sensor arranged in the elastic detection probe, the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected, and the current rotation angle is measured based on an azimuth sensor in the elastic detection probe;
acquiring a pressure idle load value of the elastic detection probe in the vertical direction;
and correcting the current pressure measured value based on the current rotation angle and the pressure idle value, and determining a target pressure measured value of the elastic detection probe.
According to the pressure correction method for the elastic detection probe, the contact pressure between the elastic detection probe and the tissue to be detected is measured by the built-in pressure sensor, so that quantitative measurement of the contact pressure can be achieved, and due to the fact that the elastic detection probe has the influence of gravity, errors exist between the detection result of the pressure sensor and the actual pressure, the detected pressure can be corrected, and the detection result tends to be more true. Further, the rotation angle of the elastic detection probe also affects the contact pressure value, so that the current rotation angle and the pressure idle value are utilized to correct the current pressure measured value, the target pressure measured value after pressure correction is finally obtained, meanwhile, the accuracy of pressure value detection is improved in a pressure correction mode, and the accuracy of an elastic measurement result is further ensured.
In some embodiments, the pressure idle value includes a first pressure idle value that is a measurement of the pressure sensor when the elastic detection probe is idle in a vertically downward direction and a second pressure idle value that is a measurement of the pressure sensor when the elastic detection probe is idle in a vertically upward direction.
According to the pressure correction method of the elastic detection probe, for the elastic detection probe, no-load values of the elastic detection probe are different in different directions, so that the accuracy of the corrected target pressure measurement value can be further improved by correcting the current pressure measurement value through combining the first pressure no-load value in the vertical downward direction and the second pressure no-load value in the vertical upward direction.
In some embodiments, the correcting the current pressure measurement based on the current rotation angle and the pressure idle value, determining a target pressure measurement of the elastic detection probe includes:
based on the first pressure idle value, the second pressure idle value and the current rotation angle,
And correcting the current pressure measured value to obtain the target pressure measured value.
According to the pressure correction method for the elastic detection probe, the pressure measurement value of the elastic detection probe is zero under the condition of no load under ideal conditions, but the pressure during no load is not zero due to the influence of the weight of the elastic detection probe, so that zero offset correction is performed by using the first pressure no-load value and the second pressure no-load value, and meanwhile, due to the influence of different rotation angles on the pressure measurement value, the pressure correction corresponding to the rotation angle is performed by using the current rotation angle, and the pressure correction of the current pressure measurement value is realized by combining the first pressure no-load value and the second pressure no-load value, so that the accuracy of the target pressure measurement value is improved.
In some embodiments, the target pressure measurement is calculated using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference between a second pressure no-load value and V 0, and θ x is a first current rotation angle.
In some embodiments, the target pressure measurement is calculated using the following formula:
wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference between a second pressure no-load value and V 0, θ x is a first current rotation angle, and θ y is a second current rotation angle.
In some embodiments, the target pressure measurement is calculated using the following formula:
wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference between a second pressure no-load value and V 0, θ x is a first current rotation angle, and θ y is a second current rotation angle.
In some embodiments, after the correcting the current pressure measurement based on the current rotation angle, the pressure no-load value, determining a target pressure measurement for the elastic detection probe, the method further comprises:
Acquiring the current working temperature of the elastic detection probe;
Determining a pressure correction coefficient corresponding to the current working temperature according to a preset temperature and pressure corresponding curve;
And correcting the target pressure measured value based on the pressure correction coefficient.
According to the correction method of the elastic detection probe, after the target pressure measured value is obtained, the target pressure measured value is subjected to secondary correction by combining the pressure correction coefficient corresponding to the current working temperature of the elastic detection probe, so that the correction effect of the obtained pressure measured value is further improved.
According to a second aspect, an embodiment of the present invention further provides an elastic detection probe connected to a host of an elastic detection system, the elastic detection probe including:
a pressure sensor for measuring a current pressure measurement, wherein the current pressure measurement is a contact pressure between the elastic detection probe and the tissue to be detected;
the azimuth sensor is used for measuring the current rotation angle of the elastic detection probe;
The pressure sensor and the azimuth sensor are in communication connection with the host, the host is used for correcting the current pressure measured value based on the current rotation angle and the pressure idle value, determining the target pressure measured value of the elastic detection probe, and the pressure idle value is the idle pressure of the elastic detection probe in the vertical direction.
According to the elastic detection probe provided by the embodiment of the invention, the contact pressure is quantitatively measured through the built-in pressure sensor, and further, in order to correct the measurement error caused by the gravity influence of the elastic detection probe, the azimuth sensor is introduced to perform pressure correction on the current pressure measurement value, so that a more accurate target pressure measurement value can be obtained, the accuracy of pressure value detection is improved in a pressure correction mode, and the accuracy and stability of an elastic measurement result are further ensured.
In some embodiments, the elastic detection probe further comprises a probe body which is in communication connection with the host, the pressure sensor and the azimuth sensor are both arranged in the probe body, and the probe body is used for generating shear waves in the tissue to be detected under the condition that the target pressure measured value meets the preset range.
According to the elastic detection probe provided by the embodiment of the invention, on the basis that an accurate target measured value is obtained through pressure correction, under the condition that the target pressure measured value meets the preset range, elastic detection is carried out, so that the stability and accuracy of measurement results are ensured when different operators carry out elastic measurement.
In some embodiments, the elastic detection probe further comprises:
The temperature sensor is connected with the host machine, the temperature sensor is used for measuring the current working temperature of the elastic detection probe, the host machine is also used for determining a pressure correction coefficient corresponding to the current working temperature according to a preset temperature and pressure corresponding curve, and correcting the target pressure measured value based on the pressure correction coefficient.
According to the elastic detection probe provided by the embodiment, through the arrangement of the temperature sensor, the working temperature of the elastic detection probe can be measured, and the secondary correction of the target pressure measured value is realized, so that the accuracy of the finally obtained pressure measured value is further improved.
According to a third aspect, an embodiment of the present invention further provides an elasticity detection system, including:
According to the elastic detection probe disclosed in the second aspect or any one of the embodiments of the second aspect, a current pressure measurement value is measured through a pressure sensor in the elastic detection probe, and a current rotation angle of the elastic detection probe is measured through an azimuth sensor in the elastic detection probe, wherein the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected;
The host computer is in communication connection with the elastic detection probe, and is used for correcting the current pressure measured value based on the current rotation angle and the pressure idle value to determine a target pressure measured value of the elastic detection probe, wherein the pressure idle value is the idle pressure of the elastic detection probe in the vertical direction.
According to the elastic detection system provided by the embodiment of the invention, the quantitative measurement of the contact pressure is carried out through the pressure sensor arranged in the elastic detection probe, and further, in order to correct the measurement error caused by the gravity influence of the elastic detection probe, the azimuth sensor is introduced into the elastic detection probe, and the host in the elastic detection system is combined to carry out pressure correction on the current pressure measurement value, so that a more accurate target pressure measurement value can be obtained, the accuracy of pressure value detection is improved in a pressure correction mode, and the accuracy of a measurement result is further ensured during subsequent elastic detection.
In some embodiments, the host is further configured to control the elastic detection probe to generate a shear wave inside a tissue to be detected and transmit an ultrasonic signal to the tissue to be detected and receive an echo signal of the ultrasonic signal when the target pressure measurement value meets a preset range, and determine elasticity of the tissue to be detected according to the echo signal.
According to the elastic detection system provided by the embodiment of the invention, on the basis that an accurate target measured value is obtained through pressure correction, under the condition that the target pressure measured value meets the preset range, elastic detection is carried out, so that the stability and accuracy of measurement results are ensured when different operators carry out elastic detection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of calibrating an elastic detection probe according to an embodiment of the invention;
fig. 2 is a flowchart of a correction method of an elastic detection probe according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The correction method of the elastic detection probe provided by the embodiment of the invention can be applied to a host in an elastic detection system, and is specifically set according to actual requirements. When the pressure sensor is applied to a host computer of the elastic detection system, the pressure sensor in the elastic detection probe is used for measuring the current pressure measurement value, the azimuth sensor in the elastic detection probe is used for measuring the current rotation angle, and the elastic detection probe is used for sending the current pressure measurement value and the current rotation angle to the host computer in the elastic detection system for pressure correction, so that the target pressure measurement value is obtained.
The pressure sensor is used for measuring the contact pressure between the elastic detection probe and the tissue to be detected, and the azimuth sensor is used for measuring the rotation angle of the elastic detection probe.
Details of the structure of the elasticity detecting probe and the elasticity detecting system will be described in detail below.
In order to more clearly show the correction process in the embodiment of the present invention, the following pre-description is first provided, specifically as follows:
The pressure described in this scheme is the pressure of the direction parallel to the probe imaging plane center axis, because this pressure is usually less, and elasticity test probe is sensitive to pressure variation, and the probe self weight also can produce pressure variation, and then also can produce pressure variation when probe angle changes, so the target pressure measurement value be the pressure after the correction.
The X axis is the horizontal direction, the Y axis is the vertical direction, and the Z axis is the direction perpendicular to the XY plane. Wherein, theta x represents the rotation angle of the elastic detection probe along the Z axis in the XY plane, the angle range is upward 0 DEG, downward 180 DEG, and left and right 90 DEG, and theta y represents the rotation angle of the elastic detection probe along the X axis in the YZ plane, the angle range is upward and downward 0 DEG, and left and right 90 deg.
According to an embodiment of the present invention, there is provided an embodiment of a method of calibrating an elastic detection probe, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical sequence is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than here.
In this embodiment, a method for calibrating an elastic detection probe is provided, which may be used for the host in the elastic detection system, and fig. 1 is a flowchart of a method for calibrating an elastic detection probe according to an embodiment of the present invention, as shown in fig. 1, where the flowchart includes the following steps:
s11, acquiring a current pressure measured value and a current rotation angle of the elastic detection probe.
The current pressure measurement value is measured based on a pressure sensor arranged in the elastic detection probe, the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected, and the current rotation angle is measured based on an azimuth sensor in the elastic detection probe.
The elastic detection probe is internally provided with the pressure sensor and the azimuth sensor, when the elastic detection probe starts to work, the pressure sensor measures the current pressure measurement value, the azimuth sensor measures the current rotation angle, and the current pressure measurement value and the current rotation angle can be obtained by the connection relation between the pressure sensor and the azimuth sensor and the host.
The tissue to be detected is the tissue to be detected, and can be liver, thyroid, and the like.
In an ideal state, when the elastic detection probe is unloaded downwards, the measured value of the pressure sensor is 0. But the measured value is not 0 due to the influence of the own weight of the elastic detecting probe. Therefore, the pressure error caused by the influence of the self weight of the elastic detection probe can be corrected, so that the accuracy of the contact pressure measurement result is improved.
S12, acquiring a pressure idle load value of the elastic detection probe in the vertical direction.
The pressure no-load value of the elastic detection probe in the vertical direction is also measured by the pressure sensor. The state that the elastic detection probe is naturally placed without contacting with the tissue to be detected is that the elastic detection probe is naturally upwards or downwards. Under the condition that the elastic detection probe is empty, the pressure measured by the pressure sensor is called a pressure empty value.
And S13, correcting the current pressure measured value based on the current rotation angle and the pressure idle value, and determining the target pressure measured value of the elastic detection probe.
As described above, the pressure idle value represents the measured value of the pressure sensor when the elastic detection probe is idle, and the current pressure measured value needs to be corrected by using the pressure idle value, and meanwhile, if the elastic detection probe is applied with the same pressure, the contact pressure applied by the elastic detection probe on the tissue to be detected is different under different rotation angles. Therefore, it is also necessary to correct the current pressure value with the current rotation angle.
Based on the above, the current pressure measurement value needs to be corrected by combining the current rotation angle and the pressure no-load value, so as to eliminate the pressure measurement error caused by the gravity influence of the elastic detection probe, and thus, an accurate target pressure measurement value is obtained.
According to the pressure correction method for the elastic detection probe, the contact pressure between the elastic detection probe and the tissue to be detected is measured by the built-in pressure sensor, so that quantitative measurement of the contact pressure can be achieved, and due to the fact that the elastic detection probe has the influence of gravity, errors exist between the detection result of the pressure sensor and the actual pressure, pressure correction can be conducted on the detected pressure, and the detection result tends to be more true. Further, the rotation angle of the elastic detection probe also affects the magnitude of the contact pressure value, so that the current rotation angle and the pressure idle value are utilized to correct the current pressure measurement value, and finally the target pressure measurement value after pressure correction is obtained, so that the target pressure measurement value is kept in a stable range, meanwhile, the accuracy of pressure value detection is improved in a pressure correction mode, and the accuracy of a measurement result is further ensured during subsequent elastic detection.
In this embodiment, a method for calibrating an elastic detection probe is provided, which may be used for a host in an elastic detection system, and fig. 2 is a flowchart of a method for calibrating an elastic detection probe according to an embodiment of the present invention, as shown in fig. 2, where the flowchart includes the following steps:
S21, acquiring the current pressure measured value and the current rotation angle of the elastic detection probe.
The current pressure measurement value is measured based on a pressure sensor arranged in the elastic detection probe, and the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected.
Referring to the embodiment S11 shown in fig. 1 in detail, the details are not repeated here,
S22, acquiring a pressure idle load value of the elastic detection probe in the vertical direction.
In this embodiment, the pressure no-load value includes a first pressure no-load value and a second pressure no-load value, where the first pressure no-load value is a measured value of the pressure sensor when the elastic detection probe is no-load in a vertically downward direction, that is, the first pressure no-load value is a measured value of the pressure sensor when the elastic detection probe is naturally placed downward, and the second pressure no-load value is a measured value of the pressure sensor when the elastic detection probe is no-load in a vertically upward direction, that is, the second pressure no-load value is a measured value of the pressure sensor when the elastic detection probe is naturally placed upward.
For the elastic detection probe, the idle load values of the elastic detection probe are different in different directions, so that the accuracy of the corrected target pressure measurement value can be further improved by correcting the current pressure measurement value by combining the first pressure idle load value in the vertical downward direction and the second pressure idle load value in the vertical upward direction.
S23, correcting the current pressure measured value based on the current rotation angle and the pressure idle value, and determining the target pressure measured value of the elastic detection probe.
Specifically, the step S23 includes:
S231, correcting the current pressure measured value based on the first pressure idle value, the second pressure idle value and the current rotation angle to obtain a target pressure measured value.
As described above, pressure correction is required from the two aspects of no-load and rotation angle respectively, and accordingly, pressure correction from the no-load angle is achieved by using the first pressure no-load value and the second pressure no-load value, pressure correction is achieved by using the second pressure no-load value and the current rotation angle when the elastic detection probe naturally faces upwards, and then, pressure correction is achieved for errors caused by the rotation angle, and the two are combined to obtain a target pressure measurement value.
In some embodiments, the target pressure measurement is calculated using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, and θ x is a first current rotation angle, specifically, a rotation angle of the elastic detection probe along the Z axis in the XY plane.
In some embodiments, the target pressure measurement is calculated using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, specifically a rotation angle of the elastic detection probe along the Z axis in the XY plane, and θ y is a second current rotation angle, specifically a rotation angle of the elastic detection probe along the X axis in the YZ plane.
In some embodiments, the target pressure measurement is calculated using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, specifically a rotation angle of the elastic detection probe along the Z axis in the XY plane, and θ y is a second current rotation angle, specifically a rotation angle of the elastic detection probe along the X axis in the YZ plane.
According to the pressure correction method for the elastic detection probe, the pressure measurement value of the elastic detection probe is zero under the condition of no load under ideal conditions, but the pressure during no load is not zero due to the influence of the weight of the elastic detection probe, so that zero offset correction is performed by using the first pressure no-load value and the second pressure no-load value, and meanwhile, due to the influence of different rotation angles on the pressure measurement value, the pressure correction corresponding to the rotation angle is performed by using the current rotation angle, the pressure correction of the current pressure measurement value is realized by combining the first pressure no-load value and the second pressure no-load value, and the accuracy of the target pressure measurement value is improved.
In some embodiments, after correcting the current pressure measurement based on the current rotation angle, the pressure no-load value, the method further comprises, after determining a target pressure measurement for the elastic detection probe:
(1) The current working temperature of the elastic detection probe is obtained.
(2) And determining a pressure correction coefficient corresponding to the current working temperature according to a preset temperature and pressure corresponding curve.
(3) The target pressure measurement is corrected based on the pressure correction coefficient.
The current working temperature of the elastic detection probe refers to the temperature of the working environment where the probe is located. Because the elasticity of different materials in the elastic detection probe is different at different temperatures, the temperature can also affect the current pressure measurement value. Therefore, the target pressure measurement value can be secondarily corrected in combination with the current working temperature of the elastic detection probe, so as to obtain a more accurate target pressure measurement value.
Specifically, a temperature sensor for measuring the current operating temperature of the elastic detection probe is provided in the elastic detection probe. And measuring a preset temperature and pressure corresponding curve through big data or experiments, obtaining a pressure correction coefficient corresponding to the current working temperature by using the relation curve after measuring the current working temperature, and multiplying the pressure correction coefficient by a target pressure measured value to obtain a correction result of the target pressure measured value.
After the target pressure measured value is obtained, the pressure correction coefficient corresponding to the current working temperature of the elastic detection probe can be combined to carry out secondary correction on the target pressure measured value, so that the accuracy of the obtained pressure measured value is further improved.
The embodiment of the invention also provides an elastic detection probe which comprises a pressure sensor and an azimuth sensor. The elastic detection probe is in communication connection with a host in the elastic detection system. In particular, the pressure sensor is used to measure the current pressure measurement of the elastic detection probe. The azimuth sensor is used for measuring the current rotation angle of the elastic detection probe. The pressure sensor and the azimuth sensor are in communication connection with a host computer, the host computer is used for correcting the current pressure measured value based on the current rotation angle and the pressure idle value, and determining the target pressure measured value of the elastic detection probe, wherein the pressure idle value is the idle pressure of the elastic detection probe in the vertical direction.
For specific correction methods, please refer to the above embodiments, and the description thereof is omitted here.
The quantitative measurement of the contact pressure is carried out through the built-in pressure sensor, further, in order to correct the measurement error caused by the influence of the gravity of the elastic detection probe, the current rotation angle and the pressure no-load value are introduced to carry out pressure correction on the current pressure measured value, and a more accurate target pressure measured value can be obtained, so that the accuracy of pressure value detection is improved in a pressure correction mode, and the accuracy and the stability of the follow-up elastic measurement result are further ensured.
In some embodiments, the elastic detection probe further comprises a probe body. The probe body is in communication connection with the host computer, and the pressure sensor and the azimuth sensor are both arranged in the probe body, and the probe body is used for generating shear waves in the tissue to be tested under the condition that the target pressure measured value meets the preset range.
In particular, the elastic detection probe also comprises a vibrator, an ultrasonic transducer or a loudspeaker for generating shear waves inside the tissue to be examined. Taking the shear wave generated by an ultrasonic transducer as an example, the elastic detection process comprises that a host of an elastic detection system sends an excitation signal to an elastic detection probe under the condition that a target pressure measured value meets a preset range, the elastic detection probe sends high-strength ultrasonic waves to tissue to be detected by the ultrasonic transducer, and acoustic radiation force is generated by focusing inside the tissue to be detected, so that the shear wave propagates inside the tissue. The elastic detection probe also transmits an ultrasonic signal for tracking the propagation of the shear wave to the tissue to be detected through the ultrasonic transducer and receives an echo signal of the ultrasonic wave. The host acquires the echo signal and processes the echo signal to obtain the elastic information of the tissue to be detected.
The ultrasonic transducer for generating the shear wave may be the same as or different from the ultrasonic transducer for transmitting the ultrasonic signal and receiving the corresponding echo signal.
According to the elastic detection probe provided by the embodiment of the invention, on the basis that an accurate target measured value is obtained through pressure correction, under the condition that the target pressure measured value meets the preset range, elastic detection is carried out, so that the stability and accuracy of measurement results are ensured when different operators carry out elastic measurement.
In some embodiments, the elastic detection probe further includes a temperature sensor disposed in the probe body, the temperature sensor is connected with the host, the temperature sensor is configured to measure a current working temperature of the elastic detection probe, the host is further configured to determine a pressure correction coefficient corresponding to the current working temperature according to a preset temperature-pressure correspondence curve, determine the pressure correction coefficient corresponding to the current working temperature according to the preset temperature-pressure correspondence curve, and correct a target pressure measurement value. The specific manner of temperature correction is described above, and will not be described herein.
The elastic detection probe also comprises an acoustic head, a transmission shaft and a sensor bracket. The sound head is matched with the transmission shaft and used for scanning the tissue to be detected through elastography. The sound head is indirectly connected with the pressure sensor through the transmission shaft, and when in elastic detection, the contact pressure of the sound head and the tissue to be detected can be measured by the pressure sensor, and accordingly, the current pressure measurement value is obtained. The sensor support is used for fixing the pressure sensor so as to ensure the stability of measurement.
Optionally, the sound head comprises an ultrasonic transducer as above.
The embodiment of the invention also provides an elasticity detection system which comprises an elasticity detection probe and a host. Specifically, a current pressure measurement value is measured through a pressure sensor in the elastic detection probe, and a current rotation angle of the elastic detection probe is measured through an azimuth sensor in the elastic detection probe, wherein the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected.
The host computer is in communication connection with the elastic detection probe, and is used for correcting the current pressure measured value based on the current rotation angle and the pressure idle value to determine the target pressure measured value of the elastic detection probe. The pressure idle load value is the idle load pressure of the elastic detection probe in the vertical direction.
For the specific process of pressure correction, please refer to the above description, and the detailed description is omitted herein.
According to the elastic detection system provided by the embodiment, the contact pressure is quantitatively measured through the pressure sensor arranged in the elastic detection probe, further, in order to correct the measurement error caused by the gravity influence of the elastic detection probe, the azimuth sensor is introduced into the elastic detection probe, the host in the elastic detection system is combined to carry out pressure correction on the current pressure measured value, so that a more accurate target pressure measured value can be obtained, the accuracy of pressure value detection is improved in a pressure correction mode, and the accuracy and stability of a measurement result are further ensured during elastic detection.
Optionally, the host is further used for controlling the elastic detection probe to generate shear waves inside the tissue to be detected and transmit ultrasonic signals to the tissue to be detected and receive echo signals of the ultrasonic signals under the condition that the target pressure measured value meets the preset range, and the host determines elastic information of the tissue to be detected according to the echo signals.
Specifically, the host is further configured to compare the target pressure measurement value with a preset pressure range, and when the target pressure measurement value meets the preset pressure range, control the elastic detection probe to generate a shear wave inside the tissue to be detected, and transmit an ultrasonic signal to the tissue to be detected and receive an echo signal of the ultrasonic signal, so that the host processes the echo signal to obtain elastic information, such as a speed, a strain, an elastic modulus, and the like, of the tissue to be detected.
The target pressure measurement value may be an uncorrected target pressure measurement value or a target pressure measurement value corrected based on the current operating temperature.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (7)
1. A pressure correction method of an elastic detection probe, comprising:
Acquiring a current pressure measurement value and a current rotation angle of the elastic detection probe, wherein the current pressure measurement value is measured based on a pressure sensor arranged in the elastic detection probe, the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected, and the current rotation angle is measured based on an azimuth sensor in the elastic detection probe;
The method comprises the steps that a pressure idle value of the elastic detection probe in the vertical direction is obtained, the pressure idle value comprises a first pressure idle value and a second pressure idle value, the first pressure idle value is a measured value of the pressure sensor when the elastic detection probe is idle in the vertical downward direction, and the second pressure idle value is a measured value of the pressure sensor when the elastic detection probe is idle in the vertical upward direction;
Correcting the current pressure measured value based on the current rotation angle and the pressure idle value, and determining a target pressure measured value of the elastic detection probe;
Wherein the target pressure measurement is calculated using the formula:
wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, and the first current rotation angle is a rotation angle of the elastic detection probe along a Z axis in an XY plane;
Or alternatively
The target pressure measurement is calculated using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, the first current rotation angle is a rotation angle of the elastic detection probe along a Z axis in an XY plane, θ y is a second current rotation angle, and the second current rotation angle is a rotation angle of the elastic detection probe along an X axis in a YZ plane;
or calculate the target pressure measurement using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, the first current rotation angle is a rotation angle of the elastic detection probe along a Z axis in an XY plane, θ y is a second current rotation angle, and the second current rotation angle is a rotation angle of the elastic detection probe along an X axis in a YZ plane.
2. The method of claim 1, wherein after said correcting said current pressure measurement based on said current rotation angle, said pressure empty load value, determining a target pressure measurement for said elastic test probe, said method further comprises:
Acquiring the current working temperature of the elastic detection probe;
Determining a pressure correction coefficient corresponding to the current working temperature according to a preset temperature and pressure corresponding curve;
And correcting the target pressure measured value based on the pressure correction coefficient.
3. An elastic detection probe, characterized in that, the elastic detection probe is connected with the host computer of elasticity detecting system, the elastic detection probe includes:
The pressure sensor is used for measuring a current pressure measurement value, wherein the current pressure measurement value is the contact pressure between the elastic detection probe and the tissue to be detected;
the azimuth sensor is used for measuring the current rotation angle of the elastic detection probe;
the main machine is used for correcting the current pressure measured value based on the current rotation angle and a pressure idle value, determining a target pressure measured value of the elastic detection probe, wherein the pressure idle value comprises a first pressure idle value and a second pressure idle value, the first pressure idle value is the measured value of the pressure sensor when the elastic detection probe is idle in the vertical downward direction, and the second pressure idle value is the measured value of the pressure sensor when the elastic detection probe is idle in the vertical upward direction;
Wherein the target pressure measurement is calculated using the formula:
wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, and the first current rotation angle is a rotation angle of the elastic detection probe along a Z axis in an XY plane;
Or alternatively
The target pressure measurement is calculated using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, the first current rotation angle is a rotation angle of the elastic detection probe along a Z axis in an XY plane, θ y is a second current rotation angle, and the second current rotation angle is a rotation angle of the elastic detection probe along an X axis in a YZ plane;
or calculate the target pressure measurement using the following formula:
Wherein V d is a target pressure measurement value, V is a current pressure measurement value, V 0 is a first pressure no-load value, V 1 is a difference value between a second pressure no-load value and V 0, θ x is a first current rotation angle, the first current rotation angle is a rotation angle of the elastic detection probe along a Z axis in an XY plane, θ y is a second current rotation angle, and the second current rotation angle is a rotation angle of the elastic detection probe along an X axis in a YZ plane.
4. A spring sensing probe according to claim 3, further comprising:
The probe body is in communication connection with the host computer, the pressure sensor with the position sensor all sets up in the probe body, the probe body is used for producing the shear wave in the inside of the tissue that awaits measuring under the condition that target pressure measured value satisfies the default scope.
5. The elasticity detection probe of claim 3 or 4, further comprising:
The temperature sensor is connected with the host machine, the temperature sensor is used for measuring the current working temperature of the elastic detection probe, the host machine is also used for determining a pressure correction coefficient corresponding to the current working temperature according to a preset temperature and pressure corresponding curve, and correcting the target pressure measured value based on the pressure correction coefficient.
6. An elasticity detection system, comprising:
the elastic detection probe according to any one of claims 3-5, measuring a current pressure measurement value by a pressure sensor within the elastic detection probe, measuring a current rotation angle of the elastic detection probe by an orientation sensor within the elastic detection probe, wherein the current pressure measurement value is a contact pressure between the elastic detection probe and a tissue to be detected;
The host computer is in communication connection with the elastic detection probe, and is used for correcting the current pressure measured value based on the current rotation angle and the pressure idle value to determine a target pressure measured value of the elastic detection probe, wherein the pressure idle value is the idle pressure of the elastic detection probe in the vertical direction.
7. The system of claim 6, wherein the system further comprises a controller configured to control the controller,
The host is also used for controlling the elastic detection probe to generate shear waves in the tissue to be detected and transmit ultrasonic signals to the tissue to be detected and receive echo signals of the ultrasonic signals under the condition that the target pressure measured value meets the preset range, and determining the elastic information of the tissue to be detected according to the echo signals.
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| CN202310624291.0A CN116671964B (en) | 2023-05-30 | 2023-05-30 | Pressure correction method of elastic detection probe, elastic detection probe and system |
| PCT/CN2024/096248 WO2024245324A1 (en) | 2023-05-30 | 2024-05-30 | Pressure calibration method for elasticity measurement probe, and elasticity measurement probe and system |
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