CN205126437U - Human body pleuroperitoneal cavity motion simulation device caused by breathing - Google Patents

Abstract

The utility model discloses a human chest and abdominal cavity motion simulation device caused by breathing, which comprises a workbench, a base and a bracket arranged on the workbench in turn, a drive motor arranged on the base, and a drive motor output end through a coupling. The connected screw rod is set on the screw rod, and the slider that can move left and right with the rotation of the screw rod is vertically set on the push plate on the top of the slider; the syringe body on the bracket is set on the syringe barrel The syringe piston in the body and the push rod connected to the outside of the syringe piston; the push rod is fixedly connected with the push plate, and at the same time, a simulated internal balloon is provided at the needle mouth of the syringe body, The balloon for simulating the body surface is covered with a balloon for simulating the body surface; the utility model has the advantage of reproducing the relevant three-dimensional movement of the chest wall body surface and the tumor in the body when the human body breathes, and provides an accurate motion model for solving the research on tumor radiotherapy breathing tracking and positioning, and Validation of Respiratory Motion Compensation for Precise Positioning of Image-Guided Radiation Therapy.

Description

A device for simulating human thorax and abdomen movement caused by breathing

technical field

The utility model belongs to the field of auxiliary simulation devices for medical equipment, in particular to a human chest and abdominal cavity motion simulation device caused by breathing.

Background technique

Tumor radiation therapy is a local treatment method for tumors treated with radiation. About 70% of cancer patients need radiation therapy during the treatment of cancer, and about 40% of cancers can be cured with radiation therapy. The role and status of radiotherapy in tumor treatment has become increasingly prominent, and it has become one of the main means of treating malignant tumors. In recent years, image-guided precision radiotherapy technology has become the development trend of tumor radiotherapy. The images of the target area are obtained through CT, X-ray, etc. and accurately registered, which greatly improves the accuracy of positioning and dose delivery in radiotherapy.

However, under the influence of physiological factors such as breathing, heartbeat, and gastrointestinal motility, the tumor located in the chest and abdomen and its surrounding tissues change dynamically, which brings difficulties to the precise positioning of the tumor target area. Relevant studies have shown that the range of motion of the pleural diaphragm under the influence of respiratory movement is 0.5-2.0 cm, and there are great individual differences. In order to reduce the adverse consequences caused by respiratory movement, traditional solutions generally adopt means such as isocenter displacement and respiratory gating. These methods are not effective due to strict requirements on the patient's breathing and state, low treatment efficiency, and normal tissues still being damaged by irradiation. Therefore, it is the best way to solve the problem of precise tumor positioning and radiotherapy navigation by studying the movement rules between the surface of the thoracoabdominal cavity and tumors in the body and establishing a connection.

The human thoracic and abdominal cavity motion simulator reproduces the movement of the thoracic and abdominal cavity body surface and tumors in the body through the motion mechanism, so as to serve for data acquisition and model verification. Existing simulators for thoracoabdominal cavity movement caused by breathing include linear slide drive simulators, high-fidelity human simulators, and the like. However, due to the complex internal structure of the high-fidelity human simulator, it is inconvenient to directly obtain the movement trajectory signal of the internal tumor. Some simulators driven by linear slides can only simulate the two-dimensional movement of the chest wall, while others can simulate the three-dimensional movement of the chest wall but cannot realize the correlation between the movement of the chest wall and the movement of the tumor. None of the existing human breathing simulation devices can accurately simulate the three-dimensional correlated movement of the body surface of the thoracoabdominal cavity and the tumor in the body.

Therefore, it is necessary to develop a new type of chest wall and internal tumor motion simulator with three-dimensional motion, and the motion between the two is correlated, so as to provide a more accurate motion model for accurate positioning research of breathing tracking.

Contents of the invention

The purpose of this utility model is to provide a human chest and abdominal cavity motion simulation device caused by breathing, which reproduces the associated three-dimensional motion of the chest wall body surface and tumors in the body when the human body breathes, and provides an accurate motion model for solving the research on tumor radiotherapy breathing tracking and positioning, and Validation of Respiratory Motion Compensation for Precise Positioning of Image-Guided Radiation Therapy.

The technical scheme of the utility model is: a device for simulating human thoracic and abdominal cavity movement caused by breathing, including a workbench, a base and a bracket arranged on the workbench in turn, and a driving motor arranged on the base, through a joint The screw rod connected to the output end of the shaft device and the drive motor is arranged on the screw rod and the slider that can move left and right with the rotation of the screw rod is vertically arranged on the push plate at the top of the slider; The syringe barrel on the bracket, the syringe piston disposed in the syringe barrel and the push rod connected to the outside of the syringe piston; the push rod is fixedly connected with the push plate, and at the same time A balloon for simulating the body is provided at the needle mouth of the syringe barrel, and a balloon for simulating the body surface is sheathed outside the balloon for simulating the body.

As a preferred technical solution, both the balloon for the simulated body and the balloon for the surface of the simulated body are provided with reflective spheres for collecting current position signals.

As a preferred technical solution, a control device is also included, and the control device includes a microcontroller electrically connected to the driving motor, and a power converter connected to the microcontroller and the driving motor.

As a preferred technical solution, two screw fixing seats are symmetrically arranged on the base, and two guide rods are respectively arranged on the two screw fixing seats and on both sides of the screw rod, and the slider is sleeved on the two guide rods. superior.

As a preferred technical solution, the driving motor is a stepping motor.

The specific principle of the utility model is as follows: the driving motor controls the rotation of the screw rod to drive the slider to perform linear motion, and the push rod pushes the syringe piston to inflate or inhale the balloon used in the simulated body, thereby controlling the balloon used in the simulated body and the surface of the simulated body The reflective sphere on the balloon is used to simulate the movement of the body surface. The reflective sphere on the balloon is used to simulate the movement of the human chest wall body surface. The reflective sphere on the balloon is used to simulate the movement of the tumor in the human body. The movement phase of the chest wall lags behind the movement of the tumor , its amplitude is also attenuated, and maintains the reciprocating motion of the shock, which is in line with the relevant laws of the chest wall surface and tumor movement in the body during the real human breathing movement, thus simulating the three-dimensional movement of the human chest wall and tumor in the body, and making the two have a Correlation provides a more realistic simulation device for subsequent research on the body surface and tumor movement laws. Simultaneously, the simulated tumor sphere and the simulated chest wall sphere are designed in an open position, which is more convenient for chest wall movement and simulated tumor sphere movement signals synchronous acquisition.

The utility model has the advantages that: the utility model is not only simple in structure, simple in operation and simple in principle, but also overcomes the defects of the prior art, makes up for the deficiency of two-dimensional and three-dimensional linear slide drive simulators, and reproduces the chest wall body when the human body breathes. The correlative three-dimensional motion of the surface and tumor in the body provides an accurate motion model and verification tool for respiration tracking and positioning research in tumor radiotherapy, as a medical teaching or scientific research instrument, and can verify the accuracy of respiration motion compensation for image-guided radiation therapy Positioning role.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among them: 1 Base, 2 Bracket, 3 Driving motor, 4 Coupling, 5 Screw rod, 6 Slider, 7 Push plate, 8 Syringe barrel, 9 Push rod, 10 Balloon for simulating body, 11 For simulating body surface Balloon, 12 screw mandrel holders, 13 guide rods.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: With reference to shown in Fig. 1, a kind of human body thoracoabdominal cavity motion simulation device caused by breathing comprises a workbench, a base 1 and a support 2 which are successively arranged on the workbench, and a drive motor 3 which is arranged on the base 1 (the The driving motor 3 is a stepping motor), the screw mandrel 5 connected with the output end of the driving motor 3 through the shaft coupling 4, the slider 6 which is arranged on the screw mandrel 5 and can move left and right with the rotation of the screw mandrel 5, vertically The push plate 7 arranged on the top of the slider 6; the syringe body 8 arranged on the support 2, the syringe piston arranged in the syringe body 8 and the push rod 9 connected with the outside of the syringe piston; the push rod 9 is fixedly connected with the push plate 7, and at the same time, the needle mouth of the syringe body 8 is provided with a balloon 10 for the simulated body, and the balloon 10 for the simulated body is covered with a balloon 11 for the simulated body surface. The balloons 11 for simulating the body surface are equipped with reflective spheres for collecting current position signals. The reflective spheres are used as the tracking targets of the NDI optical motion capture device, and their movements will be recorded.

The utility model is provided with two symmetrical screw mandrel holders 12 on the base 1, on the two screw mandrel holders 12, is respectively provided with two guide rods 13 at both sides of the screw mandrel 5, and the slide block 6 is sleeved on the two guide rods 13.

The utility model also includes a control device, which includes a microcontroller electrically connected to the driving motor 3, and a power converter connected to the microcontroller and the driving motor 3, and the power converter can convert 220V alternating current into power supply The DC power used by the controller and the drive motor 3, the microcontroller receives the instructions from the host computer through the communication interface module, and resolves it into a motion control signal for the drive motor 3, and finally controls the rotation of the drive motor 3 through the lead screw 5 Converted to linear motion, its linear motion accuracy is 0.033mm.

The upper computer of the present utility model is a controller, which simulates the size of the amount of breathing gas that the human body breathes once by controlling the movement displacement of the screw mandrel 5 in one cycle (making the syringe inflated and inhaled once), through the movement displacement and The change of movement speed is used to simulate the time required for the human body to breathe once, and a series of regular or irregular body surface respiration trajectory can be obtained from the simulation, which is used as the movement command of the human thoracic and abdominal cavity movement simulation device caused by breathing.

Of course, the above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to allow people familiar with this technology to understand the content of the present utility model and implement it accordingly, and cannot limit the protection scope of the present utility model with this. All modifications made according to the spirit of the main technical solutions of the utility model shall fall within the protection scope of the utility model.

Claims (5)

1. a human chest and abdominal cavity motion simulation device caused by breathing is characterized in that: it comprises a workbench, a base (1) and a support (2) that are successively arranged on the described workbench, and are located on the described base (1) The drive motor (3) on the top, the screw mandrel (5) connected with the output end of the drive motor (3) through the shaft coupling (4), is located on the screw mandrel (5), and can follow the screw mandrel ( 5) The slide block (6) that moves left and right by the rotation of the slide block (6) is vertically arranged on the push plate (7) at the top of the slide block (6); the syringe body (8) on the support (2), The syringe piston located in the syringe barrel (8) and the push rod (9) connected to the outside of the syringe piston; the push rod (9) is fixedly connected to the push plate (7), Simultaneously, a balloon (10) for simulating the body is provided at the nozzle of the syringe body (8), and a balloon for simulating the surface of the body is sheathed on the outside of the balloon (11) for simulating the body. 2. the human body thoracoabdominal cavity motion simulation device caused by breathing according to claim 1, is characterized in that: on the balloon (10) in the simulation body and the balloon (11) in the simulation body surface, there are A reflective sphere that collects current position signals. 3. The human thoracic and abdominal cavity motion simulation device caused by breathing according to claim 1, characterized in that: it also includes a control device, and the control device includes a microcontroller electrically connected to the drive motor (3), and A power converter connected with the microcontroller and the drive motor (3). 4. the human body thoracic and abdominal cavity motion simulation device caused by breathing according to claim 1 is characterized in that: two symmetrical screw mandrel holders (12) are set on the base (1), and two screw mandrel holders (12) are arranged symmetrically on the base (1). 12) Two guide rods (13) are respectively arranged on both sides of the screw mandrel (5), and the slider (6) is sleeved on the two guide rods (13). 5 . The device for simulating human thoracic and abdominal cavity movement caused by breathing according to claim 1 , characterized in that: the driving motor ( 3 ) is a stepping motor. 6 .