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WO2010109514A1 - Echographe - Google Patents

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Publication number
WO2010109514A1
WO2010109514A1 PCT/JP2009/001268 JP2009001268W WO2010109514A1 WO 2010109514 A1 WO2010109514 A1 WO 2010109514A1 JP 2009001268 W JP2009001268 W JP 2009001268W WO 2010109514 A1 WO2010109514 A1 WO 2010109514A1
Authority
WO
WIPO (PCT)
Prior art keywords
viewpoint
image
projection
dimensional
fetus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/001268
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English (en)
Japanese (ja)
Inventor
清水豊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to PCT/JP2009/001268 priority Critical patent/WO2010109514A1/fr
Publication of WO2010109514A1 publication Critical patent/WO2010109514A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Clinical applications

Definitions

  • the present invention relates to an ultrasonic diagnostic apparatus, and more particularly to an ultrasonic diagnostic apparatus having a function of generating and displaying a three-dimensional ultrasonic image.
  • an ultrasonic diagnostic apparatus having a function of displaying information inside a subject as a three-dimensional image is known and used for various diagnoses.
  • a plurality of two-dimensional ultrasonic images tomographic images or Doppler images
  • Volume data three-dimensional data
  • the three-dimensional data is projected onto a two-dimensional projection surface by a technique such as volume rendering or surface rendering, and the projection image is displayed on the monitor screen as a three-dimensional image showing a predetermined region in the subject.
  • Such an ultrasonic diagnostic apparatus having an imaging function of a three-dimensional image or a three-dimensional moving image is used, for example, for obstetric growth diagnosis in the obstetrics, as well as photographing a fetal face and providing it to a pregnant woman. Used for services.
  • an operator can appropriately change the viewpoint position in the display of a three-dimensional still image or a three-dimensional moving image. It has become. For example, when an operator performs an operation such as rotating a trackball while pressing a predetermined key on the console while capturing a 3D still image or a 3D moving image, the above operation is performed according to the rotation direction and the rotation amount. The viewpoint position at the time of generating the projection image changes, and thereby the fetus displayed on the monitor is rotated three-dimensionally.
  • the operator can change the viewpoint as described above to depict the fetal face. It is necessary to set the viewpoint at an appropriate position.
  • the posture of the fetus is not always constant, and because it takes various postures, the fetus moves during face-to-face capture of a three-dimensional still image or a three-dimensional moving image, or the face changes direction or the face is hidden by the fetal hand. It was difficult to maintain an appropriate perspective at all times.
  • the present invention has been made in view of such problems, and the object of the present invention is to provide a three-dimensional still image or a three-dimensional moving image suitable for fetal observation without an operator performing a change operation of the viewpoint position. Is to provide an ultrasonic diagnostic apparatus capable of rendering
  • An ultrasonic diagnostic apparatus which has been made to solve the above problems, a) an echo signal collecting means for collecting an echo signal by performing a three-dimensional ultrasonic scan on an arbitrary region in a subject including a fetus; b) three-dimensional data construction means for constructing three-dimensional data of a region in the subject including the fetus from the echo signal; c) a projection image generation means for generating a projection image obtained by projecting the three-dimensional data from a predetermined viewpoint onto a projection plane; d) display means for displaying the projected image;
  • e) detection means for detecting the orientation of the fetal face from the projected image;
  • viewpoint setting means for updating and setting the viewpoint and projection plane in the projection image generation means so that the face of the fetus is depicted in a predetermined orientation based on the detection result by the detection means; It is characterized by having
  • updating and setting the viewpoint and the projection plane means moving the viewpoint position and the position of the projection plane when generating the projection image, changing the angle of the projection plane, and the like. According to such a configuration, even when the posture of the fetus changes during imaging of a three-dimensional still image or a three-dimensional moving image, the viewpoint position or the like is automatically changed so as to track the face of the fetus. Therefore, it is possible to always maintain a viewpoint position suitable for rendering the fetal face.
  • a virtual light source is set to shade the projection image in order to make the generated image appear three-dimensional.
  • the ultrasonic diagnostic apparatus further includes a light source at the time of generating the projection image so as to illuminate the fetal face from a predetermined direction according to the update setting of the viewpoint and the projection plane. It is desirable to have light source setting means for updating the position.
  • An ultrasonic diagnostic apparatus which has been made to solve the above problems, a) an echo signal collecting means for collecting an echo signal by performing a three-dimensional ultrasonic scanning on an arbitrary region in the subject; b) three-dimensional data construction means for constructing three-dimensional data of the region in the subject from the echo signal; c) a projection image generation means for generating a projection image obtained by projecting the three-dimensional data from a predetermined viewpoint position onto a projection plane; d) display means for displaying the projected image;
  • viewpoint setting means for updating and setting the viewpoint and projection plane so that the viewpoint and projection plane in the projection image generation means move at predetermined time intervals; It is characterized by having.
  • the position of the viewpoint and the projection plane in the projection image generation means can be changed at predetermined time intervals when a three-dimensional still image or a three-dimensional moving image is captured.
  • the projected images of the fetus viewed from different directions are sequentially displayed on the monitor, and the operator and the subject (pregnant woman) perceive that the fetus is rotating three-dimensionally in the image.
  • the operator and the subject can easily recognize the form of the fetus three-dimensionally. For example, even when the hand of the fetus is located in front of the face of the fetus, It will be easier to check the face.
  • the ultrasonic diagnostic apparatus further includes condition setting means for the operator to set the movement range and / or movement cycle of the viewpoint and projection plane by the viewpoint setting means. It is desirable to do. It is more desirable to have an instruction means for the operator to instruct the start and / or end of the viewpoint and projection plane update setting by the viewpoint setting means.
  • the ultrasonic diagnostic apparatus may further include a display angle setting unit that updates and sets the display angle of the projection image on the display unit at a predetermined time interval.
  • FIG. 1 is a block diagram showing a main configuration of an ultrasonic diagnostic apparatus according to a first embodiment of the present invention.
  • the conceptual diagram which shows the acquisition method of the three-dimensional data in the ultrasonic diagnosing device of the Example.
  • FIG. 1 It is a diagram showing an example of a display image in the ultrasonic diagnostic apparatus of the embodiment, (a) is an image in which the face of the fetus is facing the front, (b) is an image in which the face of the fetus is directed diagonally to the left, (c) shows an image in which the face of the fetus faces obliquely downward, and (d) shows an image in which the face of the fetus is rotated around an axis perpendicular to the screen.
  • the block diagram which shows the principal part structure of the ultrasonic diagnosing device which concerns on 2nd Example of this invention. It is a diagram showing an example of a display image in the ultrasonic diagnostic apparatus of the embodiment, (a) shows a display image when the viewpoint position is changed, (b) is a display image when the display angle is changed Indicates.
  • FIG. 1 is a block diagram illustrating a main configuration of the ultrasonic diagnostic apparatus according to the present embodiment.
  • the ultrasonic probe 11 performs an ultrasonic scan while moving a linearly arranged piezoelectric element array in a slice direction at a predetermined interval, whereby an arbitrary three-dimensional region (hereinafter referred to as an “imaging target region”) in a subject.
  • an imaging target region an arbitrary three-dimensional region
  • the ultrasonic probe 11 is pressed against the body of a subject (not shown), transmits ultrasonic waves into the body of the subject under the control of the transmission / reception unit 12, and reflects the reflected wave from the body. Is converted into an electric signal (hereinafter referred to as an echo signal).
  • the echo signal is phased and added by the transmission / reception unit 12 and then output to the signal processing unit 13 where image data is generated by performing predetermined arithmetic processing there.
  • a digital scan converter (hereinafter abbreviated as DSC) 14 is configured to display a two-dimensional ultrasonic image or a three-dimensional image on the monitor 16 based on the image data generated by the signal processing unit 13 or a three-dimensional image generation unit 17 described later. Processing for displaying an ultrasonic image is performed.
  • the image data sent from the DSC is stored in the display memory 15, read out in synchronization with the synchronization signal of the monitor 16, and output to the monitor 16. As a result, a two-dimensional or three-dimensional ultrasound image representing information in the body of the subject is displayed on the monitor 16.
  • the three-dimensional image generation unit 17 constructs volume data (three-dimensional data) of an imaging target region from image data of a plurality of two-dimensional ultrasonic images generated in the DSC 14 based on the output of the signal processing unit 13, and A three-dimensional image (hereinafter referred to as a projection image) is generated by projecting the volume data onto a two-dimensional projection plane.
  • the face detection unit 18 detects the orientation of the fetal face included in the image based on the projection image generated by the three-dimensional image generation unit 17, and the projection processing parameter determination unit 19
  • the viewpoint and the position of the light source when generating the projection image from the volume data are determined based on the information on the face orientation of the face (details will be described later).
  • Information such as the determined viewpoint position and light source position is given to the three-dimensional image generation unit 17, and the three-dimensional image generation unit 17 performs the above-described projection image generation processing based on the viewpoint position and light source position.
  • each unit is controlled by a control unit 20 including a CPU and the like, and an instruction from an operator is input to the control unit 20 through an operation unit 21 including a keyboard, various operation buttons, a trackball, and the like.
  • the control unit 20 controls the operation of each unit in addition to the three-dimensional image generation unit 17, but the signal lines are omitted in order to avoid complexity in FIG.
  • control unit 20 The functions of the above-described units centering on the control unit 20 are realized by so-called software by causing the CPU to execute a predetermined program except for the input / output devices such as the ultrasonic probe 11, the operation unit 21, and the monitor 16. Alternatively, it may be configured by hardware by a circuit or the like. Moreover, the structure with which both were combined may be sufficient.
  • the three-dimensional image generation unit 17 corresponds to the three-dimensional data construction unit and the projection image generation unit in the present invention
  • the projection processing parameter determination unit 19 includes the viewpoint setting unit in the first aspect of the present invention and It corresponds to light source setting means.
  • FIG. 2 is a conceptual diagram showing a method for acquiring volume data of the fetus 30 in the ultrasonic diagnostic apparatus of this embodiment.
  • ultrasonic wave transmission / reception is performed by moving the scanning surface 31 at a predetermined interval by automatic three-dimensional scanning by the ultrasonic probe 11.
  • a convex ultrasonic probe in which transducer arrays are arranged in a curved line is used for observing the fetus. Therefore, the shape of the scanning surface is a sector, but in FIG. 2 the scanning surface is rectangular for convenience.
  • the reflected ultrasound electrical signal (ie, echo signal) output from the ultrasound probe 11 is output to the signal processing unit 13, and the signal processing unit 13 and the DSC 14 perform two-dimensional imaging of the fetus 30 on each scanning plane 31 at regular intervals.
  • Image data is generated.
  • the generated two-dimensional image data is sent to the three-dimensional image generation unit 17.
  • the three-dimensional image generation unit 17 has a 3D memory (not shown), arranges a plurality of two-dimensional image data acquired by one three-dimensional scan in a predetermined positional relationship, and complements a gap between images.
  • the volume data 32 of the imaging target area is constructed.
  • the volume data 32 is composed of a set of small cubes (voxels 33) having luminance values.
  • the three-dimensional image generation unit 17 generates a three-dimensional image of the fetus 30 from the volume data 32 by volume rendering.
  • the volume rendering process is a process of projecting the volume data 32 from a predetermined viewpoint position onto a two-dimensional projection plane. As shown in FIG. 3, the volume data 32, the viewpoint 34, and the projection plane 36 are displayed on a virtual three-dimensional space. , And a light source 37 are arranged, and a predetermined calculation is performed using the luminance and opacity values of the voxels 33 existing on the line of sight 35 passing from the viewpoint 34 through each point (pixel) on the projection plane 36, and the calculation The value is given as the luminance value for each pixel.
  • the obtained projection image is shaded in consideration of the light rays from the light source 37. According to such processing, a translucent projection image representing not only the surface information of the fetus 30 but also the internal information can be obtained. In addition, by setting the opacity of each voxel 33 high, it is possible to depict only the body surface of the fetus 30.
  • the projection image generation method in the three-dimensional image generation unit 17 is not limited to the above-described volume rendering. For example, surface rendering that performs projection processing after extracting the body surface of the fetus 30 from the volume data 32 is performed. A technique such as the above may be used.
  • the three-dimensional ultrasonic scanning of the imaging target region as described above is repeatedly performed at a predetermined cycle, and the projection images generated by the three-dimensional image generation unit 17 are sequentially displayed on the screen of the monitor 16 via the DSC 14 and the display memory 15.
  • the projected image of the fetus 30 is displayed on the monitor 16 as a moving image in substantially real time.
  • the ultrasonic diagnostic apparatus is characterized in that the apparatus automatically sets a viewpoint position suitable for rendering the face of the fetus 30 when capturing a three-dimensional still image or a three-dimensional moving image. Yes.
  • the apparatus automatically sets a viewpoint position suitable for rendering the face of the fetus 30 when capturing a three-dimensional still image or a three-dimensional moving image.
  • the operator brings the probe 11 into contact with a predetermined position on the abdomen of the subject (pregnant woman) and starts imaging an ultrasonic image.
  • three-dimensional scanning by the ultrasonic probe 11 is executed, two-dimensional image data for a plurality of frames over the entire imaging target region is imaged, and the fetus 30 is extracted from the set of the two-dimensional image data in the three-dimensional image generation unit 17. Projection images are generated.
  • the projection image generated by the three-dimensional image generation unit 17 is transmitted to the DSC 14 and displayed on the monitor 16 and also to the face detection unit 18.
  • the face detection unit 18 stores in advance a plurality of template images created by cutting out facial regions from images of the fetus 30 in various orientations, and covers the entire projection image acquired from the three-dimensional image generation unit 17. Similarities are sequentially calculated while moving the template image. The movement of the template image and the calculation of the similarity are performed for each template image, the highest similarity values in the template images are compared with each other, and the template image having the highest value is determined in the projection image. It is determined as an image that matches the orientation of the face of the fetus 30.
  • the face detection unit 18 stores information related to the orientation of the fetal face in each template image (for example, an orientation rotated by 30 ° around the X axis and 20 ° around the Y axis from the front direction) in association with each template image.
  • the orientation of the face of the fetus 30 in the projection image is clarified as described above.
  • the projection processing parameter determination unit 19 uses the predetermined conversion formula, conversion table, or the like to face the face of the fetus 30 to the front (as shown in FIG. 4A, the face 30a faces the front.
  • the position of the viewpoint 34 and the position and angle of the projection plane 36 for drawing in a state where the top of the head is directly above are determined.
  • the position of the light source 37 is determined so that the face of the fetus 30 is illuminated from a predetermined direction (for example, the front of the upper head).
  • the viewpoint 34 is moved so as to wrap around the left side of the volume data 32, and the fetus 30 is moved as shown in FIG.
  • the viewpoint 34 is moved so as to wrap around the volume data 32.
  • the projection plane 36 also moves to a position facing the new viewpoint position with the volume data 32 interposed therebetween.
  • Parameters such as the viewpoint position determined by the projection processing parameter determination unit 19 are given to the three-dimensional image generation unit 17. Thereby, parameters such as a newly set viewpoint position are applied to the subsequent projection processing, and a projection image is generated in which the face of the fetus 30 faces the front and is illuminated from an appropriate direction.
  • the face of the fetus 30 can be tracked and a three-dimensional still image or a three-dimensional moving image suitable for observation of the face of the fetus 30 can always be taken.
  • the position of the viewpoint 34 is set so that the face of the fetus 30 is drawn from the front, but the viewpoint position may be set so that the face of the fetus 30 is drawn from the side or diagonal direction. Good.
  • FIG. 5 is a block diagram illustrating a main configuration of the ultrasonic diagnostic apparatus according to the present embodiment.
  • symbol is attached
  • the projection processing parameter generation unit 22 generates parameters such as the position of the viewpoint 34 and the position and angle of the projection plane 36 when performing projection processing in the 3D image generation unit 17 at predetermined time intervals. The parameters are changed so that the projection plane 36 turns around the volume data 32 at a predetermined angular interval. The parameters that are sequentially generated by the projection processing parameter generation unit 22 are given to the three-dimensional image generation unit 17, and the three-dimensional image generation unit 17 applies the parameters to the volume data 32 that is sequentially generated along with the three-dimensional ultrasonic scanning. The projection processing according to the above is executed. As a result, the projected images sequentially generated by the three-dimensional image generation unit 17 have slightly different viewpoint positions, as shown in FIG.
  • the operator and the subject can monitor the projected images. It is perceived that the fetus is rotating three-dimensionally in a three-dimensional moving image displayed in real time on 16. Note that the rotation range and rotation cycle at this time can be freely set by the operator using the operation unit 21, and further, when the operator presses a predetermined key provided on the operation unit 21, the rotation is performed. Can be instructed as appropriate.
  • a display processing parameter generation unit that generates display angle values at predetermined time intervals when the projection image generated by the three-dimensional image generation unit 17 is displayed on the monitor 16. 23. Since the display angle values generated by the display processing parameter generation unit 23 sequentially change at predetermined angular intervals, the projection image is rotated in accordance with the display angle values in the DSC 14 and displayed on the monitor 16 in real time. As shown in FIG. 6B, the three-dimensional moving image is rotated two-dimensionally about an axis perpendicular to the screen. Note that the rotation range and rotation cycle at this time can also be freely set by the operator using the operation unit 21, and further, when the operator presses a predetermined key provided on the operation unit 21, the rotation is performed. Can be instructed as appropriate.
  • the ultrasonic diagnostic apparatus of the present embodiment is useful not only for observing the fetus but also for capturing a three-dimensional structure of a blood vessel by capturing a three-dimensional still image or a three-dimensional moving image of a blood vessel, for example. is there.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

L'invention porte sur un échographe qui comprend un moyen de création de données tridimensionnelles (17) destiné à construire des données tridimensionnelles d'une zone chez un sujet, y compris un foetus, un moyen de création d'image de projection (17) destiné à créer une image de projection obtenue par projection de données tridimensionnelles sur un plan de projection à partir d'un point de vue prédéterminé, et un moyen d'affichage (16) destiné à afficher l'image de projection. L'échographe comporte en outre un moyen de détection (18) destiné à détecter l'orientation du visage du foetus à partir de l'image de projection, et un moyen de réglage de point de vue (19) destiné à actualiser le réglage du point de vue et le plan de projection dans le moyen de création d'image de projection (17) de telle sorte que le visage du foetus soit amené dans une orientation prédéterminée sur la base des résultats de détection à partir du moyen de détection (18). Il en résulte qu'un opérateur peut conserver une position de point de vue appropriée à l'orientation du visage du foetus sans réaliser d'opération de modification de la position du point de vue.
PCT/JP2009/001268 2009-03-23 2009-03-23 Echographe Ceased WO2010109514A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/001268 WO2010109514A1 (fr) 2009-03-23 2009-03-23 Echographe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/001268 WO2010109514A1 (fr) 2009-03-23 2009-03-23 Echographe

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WO2010109514A1 true WO2010109514A1 (fr) 2010-09-30

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PCT/JP2009/001268 Ceased WO2010109514A1 (fr) 2009-03-23 2009-03-23 Echographe

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014124269A (ja) * 2012-12-25 2014-07-07 Toshiba Corp 超音波診断装置
JP2015019729A (ja) * 2013-07-17 2015-02-02 株式会社東芝 超音波診断装置及び画像処理装置
JP2022165501A (ja) * 2021-04-20 2022-11-01 キヤノンメディカルシステムズ株式会社 超音波診断装置、医用画像処理装置、およびプログラム
US11521363B2 (en) * 2017-05-12 2022-12-06 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. Ultrasonic device, and method and system for transforming display of three-dimensional ultrasonic image thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11151240A (ja) * 1997-11-25 1999-06-08 Ge Yokogawa Medical Systems Ltd 投影画像表示方法、投影画像生成方法および装置並びに医用画像装置
JP2006167100A (ja) * 2004-12-15 2006-06-29 Toshiba Corp 超音波診断装置
JP2008048951A (ja) * 2006-08-25 2008-03-06 Shimadzu Corp 超音波診断装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11151240A (ja) * 1997-11-25 1999-06-08 Ge Yokogawa Medical Systems Ltd 投影画像表示方法、投影画像生成方法および装置並びに医用画像装置
JP2006167100A (ja) * 2004-12-15 2006-06-29 Toshiba Corp 超音波診断装置
JP2008048951A (ja) * 2006-08-25 2008-03-06 Shimadzu Corp 超音波診断装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014124269A (ja) * 2012-12-25 2014-07-07 Toshiba Corp 超音波診断装置
JP2015019729A (ja) * 2013-07-17 2015-02-02 株式会社東芝 超音波診断装置及び画像処理装置
US11521363B2 (en) * 2017-05-12 2022-12-06 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. Ultrasonic device, and method and system for transforming display of three-dimensional ultrasonic image thereof
JP2022165501A (ja) * 2021-04-20 2022-11-01 キヤノンメディカルシステムズ株式会社 超音波診断装置、医用画像処理装置、およびプログラム
JP7662394B2 (ja) 2021-04-20 2025-04-15 キヤノンメディカルシステムズ株式会社 超音波診断装置、医用画像処理装置、およびプログラム

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