Breathing motion simulation device

Abstract

The invention discloses a respiratory movement simulation device, and belongs to the field of human body simulation. A lead screw is rotatably mounted on a support and is in transmission connection with the output end of a driving part, the driving part drives the lead screw to rotate relative to the support, a cylinder body is fixed to the support, a cavity is formed in the cylinder body, and a sliding block is matched with the lead screw; one end of the push rod is fixed to the sliding block, the other end of the push rod is installed in the cavity in a sealed mode, the cavity communicates with the cavity of the phantom through a pipeline, and the cavity of the phantom, the pipeline and the cavity of the cylinder body are all filled with liquid. The driving piece drives the push rod to move relative to the cylinder body through the lead screw and the sliding block to press liquid in the cylinder body into the phantom or suck the liquid out of the phantom to enable the phantom to deform to simulate breathing movement, and through the design, a transmission medium of the device is liquid instead of gas, so that the medium is not compressed, and the breathing movement is simulated. And the amount of liquid discharged or sucked back from the cylinder body is equal to the amount of liquid flowing in or out of the phantom, so that the task of accurately controlling the fluid to drive the phantom to perform breathing motion simulation is realized.

Description

Technical Field

[0001] The invention relates to the field of human body simulation, in particular to a breathing motion simulation device. Background Art

[0002] Radiotherapy is an excellent way to treat tumors non-invasively and quickly. In recent years, image-guided precision radiotherapy technology has become a development trend in tumor radiotherapy. By obtaining images of the target area through CT, X-rays, etc. and performing precise alignment, the accuracy of positioning and dose delivery in radiotherapy has been greatly improved.

[0003] However, most organs and tissues in the human chest and abdominal cavity are not static. Breathing, heartbeat and gastrointestinal peristalsis can cause the movement of chest and abdominal tumors, which makes it difficult to accurately locate the tumor target area. Continuous scanning of the target area can obtain the precise location of the tumor, but it will cause radiation damage to the human body. Early solutions used active breath holding and respiratory gating to reduce the interference of breathing on tumor positioning, but they failed to develop continuously due to high requirements for patient signs and inaccurate positioning. Therefore, studying the movement patterns of the chest and abdominal surface and tumors in the body and establishing a connection is the best way to solve the problem of tumor accurate positioning and radiotherapy navigation.

[0004] The human respiratory motion simulation device reproduces the movement of the chest and abdominal cavity surface and the tumor in the body through the motion mechanism, thereby serving data acquisition and model verification. Existing human respiratory motion simulation devices include linear slide drive simulators, high-simulation human simulators, etc.

[0005] However, existing respiratory motion simulation devices use air bags to expand and contract to simulate lung deformation and induce body surface movement. However, gases are compressible, and the amount of gas input each time cannot be completely determined. This will cause the accuracy of the phantom respiratory motion simulation to be uncontrollable, and each simulated movement may be inconsistent. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a respiratory motion simulation device driven by liquid.

[0007] One of the purposes of the present invention is achieved by the following technical solution:

[0008] A breathing motion simulation device comprises a phantom, wherein the phantom is made of a flexible material, the phantom is a hollow structure, and a cavity is formed inside the phantom. The breathing motion simulation device also comprises a driving structure and a pipeline, wherein the driving structure comprises a bracket, a driving member, a screw rod, a cylinder body, a push rod and a slider, wherein the driving member is fixed to the bracket, the screw rod is rotatably mounted on the bracket, and the screw rod is transmission-connected to an output end of the driving member, and the driving member drives the screw rod to rotate relative to the bracket, the cylinder body is fixed to the bracket, a cavity is provided inside the cylinder body, the slider cooperates with the screw rod, one end of the push rod is fixed to the slider, and the other end of the push rod is sealingly mounted inside the cavity, the cavity is communicated with the cavity of the phantom through the pipeline, the cavity of the phantom, the pipeline and the cavity of the cylinder body are all filled with liquid, and the driving member drives the push rod to move relative to the cylinder body through the screw rod and the slider to press the liquid in the cylinder body into the phantom or suck out the phantom so that the phantom is deformed to simulate breathing motion.

[0009] Furthermore, the push rod is provided with a sealing end, the sealing end is made of elastic material, the sealing end is located inside the cylinder body and is sealed with the cylinder body to form the edge of the cavity.

[0010] Furthermore, the cylinder body and the push rod are located on the same straight line.

[0011] Furthermore, the sliding block is slidably mounted on the bracket.

[0012] Furthermore, the bracket includes a base plate, a first mounting plate, a second mounting plate and a sliding rod, the first mounting plate and the second mounting plate are respectively fixed at two ends of the base plate, the driving member is fixed to the base plate, the screw rod is rotatably mounted on the first mounting plate and the second mounting plate, the sliding rod is fixed to the first mounting plate and the second mounting plate, and the slider is slidably mounted on the sliding rod.

[0013] Furthermore, the sliding rod is parallel to the screw rod.

[0014] Furthermore, the phantom is a lung phantom, the phantom has two cavities, the two cavities are disconnected from each other, and the cavity of the cylinder is connected to the two cavities respectively through the pipeline.

[0015] Furthermore, the pipeline includes a first tube body, a tee and two second tube bodies, one end of the first tube body is connected to the cavity of the cylinder body, the other end of the first tube body is connected to the tee, the two output ends of the tee are respectively connected to the two second tube bodies, and the two second tube bodies are respectively connected to the two cavities.

[0016] Furthermore, the driving component is a stepping motor.

[0017] Furthermore, the phantom is made of silicone.

[0018] Compared with the prior art, the driving structure of the respiratory motion simulation device of the present invention includes a bracket, a driving member, a screw, a cylinder, a push rod and a slider, the driving member is fixed to the bracket, the screw is rotatably installed on the bracket and the screw is transmission-connected to the output end of the driving member, the driving member drives the screw to rotate relative to the bracket, the cylinder is fixed to the bracket, a cavity is provided inside the cylinder, the slider cooperates with the screw, one end of the push rod is fixed to the slider and the other end of the push rod is sealingly installed inside the cavity, the cavity is connected to the cavity of the phantom through a pipeline, the cavity of the phantom, the pipeline and the cavity of the cylinder are all filled with liquid, and ... and the cylinder is fixed to the bracket, and the screw is rotationally installed relative to the output end of the driving member. The moving part drives the push rod to move relative to the cylinder body through the screw rod and the slider to press the liquid in the cylinder body into the phantom or suck it out of the phantom to deform the phantom to simulate the breathing movement. Through the above design, the transmission medium of the device is liquid instead of gas, so the medium will not be compressed. The amount of liquid discharged from the cylinder body is equal to the amount of liquid flowing into the fluid-driven phantom, and the amount of liquid sucked back into the cylinder body is equal to the amount of fluid discharged from the fluid-driven phantom. It is only necessary to control the forward and reverse rotation and speed of the motor to control the flow rate and fluid flow direction in the circuit, thereby achieving the task of accurately controlling the fluid-driven phantom breathing movement simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereoscopic diagram of the respiratory motion simulation device of the present invention;

[0020] Figure 2 for Figure 1 A stereoscopic diagram of a driving structure of a respiratory motion simulation device;

[0021] Figure 3 for Figure 2 A three-dimensional cross-sectional view of the drive structure.

[0022] In the figure: 10, driving structure; 11, bracket; 110, bottom plate; 111, first mounting plate; 112, second mounting plate; 113, sliding rod; 12, driving member; 13, screw rod; 14, cylinder body; 140, cavity; 141, inlet and outlet; 15, push rod; 150, sealing end; 16, slider; 20, pipeline; 21, first tube body; 22, three-way pipe; 23, second tube body; 30, phantom. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] The respiratory motion simulation device is used to simulate the position changes of tumors and organs inside or on the body caused by breathing.

[0027] See also Figure 1 The respiratory motion simulation device includes a driving structure 10, a pipeline 20 and a phantom 30. The driving structure 10 compresses or re-absorbs liquid, so that the liquid enters the phantom 30 from the pipeline 20 or the liquid is re-absorbed from the phantom 30 to the driving structure 10, thereby simulating the breathing action and deforming the phantom 30 to obtain the position changes of tumors and organs inside or on the surface of the body caused by breathing.

[0028] Please continue reading Figure 2 as well as Figure 3 The driving structure 10 includes a bracket 11, a driving member 12, a screw rod 13, a cylinder body 14, a push rod 15 and a slider 16.

[0029] The bracket 11 includes a bottom plate 110, a first mounting plate 111, a second mounting plate 112 and a slide bar 113. The first mounting plate 111 and the second mounting plate 112 are fixed to both ends of the bottom plate 110. The first mounting plate 111 is parallel to the second mounting plate 112, and the first mounting plate 111 and the second mounting plate 112 are both perpendicular to the bottom plate 110. An installation space for installing the screw rod 13, the cylinder body 14, the push rod 15 and the slide bar 16 is formed between the first mounting plate 111 and the second mounting plate 112.

[0030] The driving member 12 is fixed to the bottom plate 110, and is used to drive the push rod 15 to move to squeeze the liquid or suck back the liquid. In this embodiment, the driving member 12 is a stepping motor.

[0031] The screw rod 13 is rotatably mounted on the first mounting plate 111 and the second mounting plate 112 . The screw rod 13 is transmission-connected to the driving member 12 , and the driving member 12 drives the screw rod 13 to rotate.

[0032] The cylinder 14 is fixed to the first mounting plate 111. The cylinder 14 is a hollow structure, and a cavity 140 is formed inside the cylinder 14. The cavity 140 is used to contain liquid. The cylinder 14 is provided with an inlet and outlet 141, which is connected to the cavity 140 and is used for the liquid in the cavity 140 to enter and exit.

[0033] One end of the push rod 15 is fixed to the slider 16. A sealing end 150 is provided at one end of the push rod 15 away from the slider 16. The sealing end 150 is made of elastic material. The sealing end 150 is received in the cavity 140 and is slidably and sealedly connected to the inner wall of the cavity 140. The slider 16 is slidably mounted on the slide bar 113. The slider 16 cooperates with the screw rod 13. The screw rod 13 rotates to drive the slider 16 to move, so that the push rod 15 moves relative to the cylinder body 14, so that the volume of the cavity 140 increases or decreases.

[0034] Please continue reading Figure 1 The pipeline 20 includes a first tube body 21, a three-way tube 22 and two second tube bodies 23. One end of the first tube body 21 is connected to the cavity 140 of the cylinder body 14, and the other end of the first tube body 21 is connected to the three-way tube 22. The two output ends of the three-way tube 22 are respectively connected to the two second tube bodies 23, and the two second tube bodies 23 are respectively connected to the two cavities inside the phantom 30. The first tube body 21 and the two second tube bodies 23 are rubber tubes.

[0035] The phantom 30 is a hollow structure with a cavity formed inside. The cavity is filled with liquid. The phantom 30 is deformed by changing the amount of liquid in the cavity to simulate breathing. The phantom 30 is made of a flexible material. In this embodiment, the phantom 30 is made of silicone. In this embodiment, the phantom 30 is a lung phantom. Since the human lung includes left and right parts, two independent cavities are formed inside the phantom 30, and the two second tubes 23 are respectively connected to the two independent cavities.

[0036] When using the breathing motion simulation device, first fill the two cavities of the phantom 30 with water or other liquids (such as oil), fill the cavity 140 with water or other liquids through the inlet and outlet 141 of the cylinder 14, then connect the first tube 21 to the inlet and outlet 141 of the cylinder 14, fill the first tube 21 with water or other liquids, and the first tube 21 can be connected to the other two second tubes 23 through the three-way pipe 22, and then fill the two second tubes 23 with liquids and connect the phantom 30. Since the transmission medium of the device is liquid rather than gas, the medium will not be compressed, so the amount of liquid discharged from the cylinder 14 is equal to the amount of liquid flowing into the phantom 30, and the amount of liquid sucked back into the cylinder 14 is equal to the amount of fluid discharged from the phantom 30. The flow rate and fluid flow direction in the circuit can be controlled by simply controlling the forward and reverse rotation and speed of the motor, and the task of accurately controlling the breathing motion simulation of the phantom 30 can be achieved. Here, a stepper motor and an ordinary Arduino board are used to adjust the distance and speed of the push rod 15 pushing and pulling the cylinder 14 by changing the number of motor rotations and the interval time of each step, thereby controlling the flow rate of the fluid and accurately controlling the respiratory motion simulation phantom in real time.

[0037] Compared with the respiratory motion simulation phantom using pneumatic transmission, the transmission medium of the present invention is liquid such as water, which is incompressible, so the flow rate of the phantom can be determined. In addition, because the stepper motor and the screw 13 are used to drive the push rod 15 to move, the control accuracy of the phantom 30 is also very high.

[0038] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A respiratory motion simulation device, comprising a phantom, wherein the phantom is made of a flexible material, the phantom is a hollow structure, and a cavity is formed inside, wherein: The respiratory motion simulation device also includes a driving structure and a pipeline. The driving structure includes a bracket, a driving member, a screw, a cylinder, a push rod and a slider. The driving member is fixed to the bracket, the screw is rotatably installed on the bracket and the screw is transmission-connected to the output end of the driving member. The driving member drives the screw to rotate relative to the bracket. The cylinder is fixed to the bracket. A cavity is provided inside the cylinder. The slider cooperates with the screw, one end of the push rod is fixed to the slider and the other end of the push rod is sealingly installed inside the cavity. The cavity is connected to the cavity of the phantom through the pipeline. The cavity of the phantom, the pipeline and the cavity of the cylinder are all filled with liquid. The driving member drives the push rod to move relative to the cylinder through the screw and the slider to press the liquid in the cylinder into the phantom or suck out the phantom to deform the phantom to simulate respiratory motion.

2. The respiratory motion simulation device according to claim 1, characterized in that: The push rod is provided with a sealing end, which is made of elastic material. The sealing end is located inside the cylinder body and is sealed with the cylinder body to form the edge of the cavity.

3. The respiratory motion simulation device according to claim 1, characterized in that: The cylinder body and the push rod are located on the same straight line.

4. The respiratory motion simulation device according to claim 1, characterized in that: The sliding block is slidably mounted on the bracket.

5. The respiratory motion simulation device according to claim 4, characterized in that: The bracket includes a base plate, a first mounting plate, a second mounting plate and a sliding rod. The first mounting plate and the second mounting plate are respectively fixed at two ends of the base plate, the driving member is fixed to the base plate, the screw rod is rotatably mounted on the first mounting plate and the second mounting plate, the sliding rod is fixed on the first mounting plate and the second mounting plate, and the slider is slidably mounted on the sliding rod.

6. The respiratory motion simulation device according to claim 5, characterized in that: The sliding rod is parallel to the screw rod.

7. The respiratory motion simulation device according to claim 1, characterized in that: The phantom is a lung phantom, the phantom has two cavities, the two cavities are disconnected from each other, and the cavity of the cylinder is connected to the two cavities respectively through the pipeline.

8. The respiratory motion simulation device according to claim 7, characterized in that: The pipeline includes a first tube body, a tee and two second tube bodies, one end of the first tube body is connected to the cavity of the cylinder body, the other end of the first tube body is connected to the tee, the two output ends of the tee are respectively connected to the two second tube bodies, and the two second tube bodies are respectively connected to the two cavities.

9. The respiratory motion simulation device according to claim 1, characterized in that: The driving component is a stepping motor.

10. The respiratory motion simulation device according to claim 1, characterized in that: The phantom is made of silicone.

Images