WO2014131178A1

WO2014131178A1 - Respiration tracking apparatus and radiation therapy system

Info

Publication number: WO2014131178A1
Application number: PCT/CN2013/071997
Authority: WO
Inventors: 吴中华
Original assignee: 深圳市奥沃医学新技术发展有限公司
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2014-09-04
Also published as: CN104220132A; CN104220132B

Abstract

A respiration tracking apparatus (100) and a radiation therapy system, related to the field of radiation therapy. The respiration tracking apparatus (100) comprises: a respiration control module (110) that is connected to an analysis and comparison module (120) and is used for controlling an outputted respiratory flow and respiratory frequency, and for transmitting time trajectory coordinate values of a positional movement of a tumor and respiratory waveform and frequency of a patient to the analysis and comparison module (120); the analysis and comparison module (120) that is connected to a therapy control module (130), compares the respiratory waveform and frequency of the patient with respiratory waveform and frequency collected during planning and design, and, when the difference is less than or equal to a predetermined value, instructs the therapy control module (130) to control, on the basis of the time trajectory coordinate values of the positional movement of the tumor, a therapy apparatus (200) to conduct a therapy; and, the therapy control module (130) that controls, on the basis of the instruction of the analysis and comparison module (120), the therapy apparatus (200) to conduct the therapy. The respiration tracking apparatus (100) and the radiation therapy system are capable of tracking precisely and treating a tumor that moves in position due to respiration.

Description

Breath tracking device and radiation therapy system

Technical field

The invention belongs to the field of precise radiation therapy in the medical field, and in particular relates to a respiratory tracking device and a radiation therapy system. Background technique

Accurate radiotherapy is a three-dimensional treatment technology based on high-resolution image detection devices for precise positioning, positioning, and illumination. Accurate radiotherapy can reduce the probability of normal tissue surrounding the target area, increase the dose of tumor area, and increase the rate of tumor control. However, human tumors, especially chest and abdomen tumors, move with the breathing movement of the human body, and the irradiation field is relatively static, which causes the exposure dose of important normal tissues in the target area and its surroundings to be significantly different from that of the plan. The accuracy of the treatment is affected. Therefore, in the precise radiotherapy of tumors, especially chest and abdomen tumors, it is necessary to use respiratory tracking devices to reduce the adverse effects of respiratory movements.

The existing respiratory tracking device generally adopts a human body external fixed marker body, and the movement law of the marker body is collected by a high speed camera to judge the respiratory state of the lungs; or it is judged by installing a bundled expansion and contraction on the human chest to collect the chest ups and downs of the human body. Breathing of the lungs. In the case of respiratory collection, the patient is required to collect respiratory conditions at the end of inspiration or at the end of expiration to make a treatment plan. During the treatment, according to the signal collected by the high-speed camera or the signal collected by the bundled telescopic belt to analyze whether the patient reaches the end of expiration or inspiratory end, the treatment device starts treatment only when the patient is relatively stable at the end of expiration or inhalation. The device stops treatment when the patient starts inhaling or exhaling again, thereby achieving respiratory tracking. However, such a respiratory tracking device is intermittent, does not have the characteristics of real-time tracking, and cannot accurately track a tumor that is moved due to the position of the breath. Summary of the invention It is an object of the present invention to provide a respiratory tracking device and a radiation therapy system, which are directed to solving the problem that the prior art cannot accurately track a tumor that is moved due to the position of the breath.

The present invention is implemented as follows, a breathing tracking device includes a breathing control module, an analysis comparison module, and a treatment control module, wherein: the breathing control module is coupled to the analysis comparison module for controlling the output of the breathing Flow rate and respiratory rate, and transmitting a time trajectory coordinate value of the tumor position movement and a patient respiratory waveform and frequency to the analysis comparison module; the analysis comparison module is coupled to the respiratory control module and the treatment control module Receiving a time trajectory coordinate value of the tumor position movement and the patient respiratory waveform and frequency sent by the respiratory control module, and comparing the patient respiratory waveform and frequency with a respiratory waveform and frequency collected during planned design, When the difference between the respiratory waveform and the frequency of the patient and the respiratory waveform and frequency collected during the planned design is less than or equal to a preset value, the treatment control module is instructed to control the treatment according to the time trajectory coordinate value of the movement of the tumor position The device is treated; and the treatment control module is coupled to the Analysis of comparison module, for treatment according to the analysis and comparison of the indication of the module, the position of the tumor in accordance with the movement locus of the time coordinate value of the control treatment device.

Preferably, when the difference between the respiratory waveform and the frequency of the patient and the respiratory waveform and frequency collected during the planned design is greater than a preset value, the analysis comparison module instructs the treatment control module to stop the treatment.

Preferably, the breathing control module further comprises a breathing supply recording module, an image scanning module and a tumor position calculating module, wherein: the breathing supply and recording module is connected to the tumor position calculating module, according to a preset respiratory flow Supplying oxygen to the patient at a respiratory rate, recording a respiratory waveform and frequency of the patient, and transmitting the patient respiratory waveform and frequency to the tumor location calculation module; and the image scanning module being coupled to the tumor location calculation The module performs image scanning on the patient while the patient is breathing smoothly, and sends the scanned patient dynamic image to the tumor location calculation module.

Preferably, the tumor position calculation module is connected to the respiratory supply recording module and the image scanning module, and receives the patient respiratory waveform and frequency sent by the respiratory supply and recording module and the image scanning module sends The patient dynamic image, based on the patient dynamic image and Calculating a time trajectory coordinate value of the movement of the tumor position in the respiratory waveform and frequency of the patient, and calculating a time trajectory coordinate value of the movement of the tumor position and a respiratory waveform of the patient and The frequency is sent to the analysis comparison module.

Preferably, the image scan of the patient is scanned for at least one complete respiratory frequency period.

Preferably, the image scanning module is a dynamic CT.

Another object of the present invention is to provide a radiation therapy system comprising the respiratory tracking device described above.

Preferably, the treatment device treats the patient based on the indication of the treatment control module in the respiratory tracking device.

The respiratory tracking device and the radiation therapy system provided by the present invention can accurately track and treat tumors that move due to the position of the breathing. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a block diagram showing the structure of a respiratory tracking apparatus according to an embodiment of the present invention;

2 is a structural block diagram of a radiation therapy system according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1, FIG. 1 is a structural block diagram of a respiratory tracking apparatus according to an embodiment of the present invention. Such as As shown in FIG. 1, the respiratory tracking device 100 includes a respiratory control module 110, an analytical comparison module 120, and a treatment control module 130.

The breathing control module 110 is coupled to the analysis comparison module 120 for controlling the respiratory flow and respiratory frequency of the output thereof, and transmitting the time trajectory coordinate value of the patient tumor position movement and the patient respiratory waveform and frequency to the analysis comparison module 120. The breathing control module 110 further includes: a breathing supply recording module 111, an image scanning module 113, and a tumor position calculating module 115.

The breathing supply and recording module 111 is connected to the tumor position calculating module 115, supplies oxygen to the patient according to the preset respiratory flow rate and respiratory frequency, records the respiratory waveform and frequency of the patient, and transmits the recorded respiratory waveform and frequency of the patient to the tumor. Location calculation module 115.

The image scanning module 113 is connected to the tumor position calculating module 115, and performs image scanning on the patient while the patient is breathing smoothly, and sends the scanned patient dynamic image to the tumor position calculating module 115, wherein the image scanning range is at least A complete respiratory frequency cycle, a complete respiratory frequency cycle refers to a complete exhalation plus inhalation process, and the image scanning module 113 can be a dynamic CT.

The tumor position calculation module 115 is connected to the respiratory supply recording module 111 and the image scanning module 113, and receives the patient respiratory waveform and frequency sent by the respiratory supply and recording module 111 and the patient dynamic image transmitted by the image scanning module 113, according to the patient dynamic image and the patient. The respiratory waveform and frequency are used to calculate the time trajectory coordinate value of the tumor position movement of the patient in the respiratory waveform and frequency, and the time trajectory coordinate value and the patient respiratory waveform and frequency are sent to the analysis comparison module 120.

The analysis comparison module 120 is connected to the tumor position calculation module 115 and the treatment control module 130, and receives the time trajectory coordinate value of the tumor position movement and the patient respiratory waveform and frequency sent by the tumor position calculation module 115, and the patient respiratory waveform and frequency and the plan The respiratory waveform and the frequency collected during the design are compared. When the difference between the respiratory waveform and the frequency of the patient and the respiratory waveform and frequency collected during the planned design is less than or equal to the preset value, the analysis comparison module 120 instructs the treatment control module 130 to follow the The time trajectory coordinate value of the tumor position movement controls the treatment device for treatment. When the difference between the respiratory waveform and the frequency of the patient and the respiratory waveform and frequency collected during the planned design is greater than the preset value, the analysis comparison module 120 instructs the treatment control module 130 to stop the treatment, and after the patient's breathing condition is adjusted to stabilize the breathing, Continue treatment. The treatment control module 130 is coupled to the analysis comparison module 120 and controls the treatment device to perform treatment according to the time trajectory coordinate value of the tumor position movement according to the indication of the analysis comparison module 120.

That is to say, during the whole treatment process, the analysis comparison module 120 continuously compares the collected patient respiratory waveform and frequency with the respiratory waveform and frequency collected during the planned design, if the preset value is exceeded (ie, The error allowed value will terminate the treatment.

2 is a structural block diagram of a radiation therapy system according to an embodiment of the present invention. As shown in FIG. 2, the radiation therapy system includes a respiratory tracking device 100 and a treatment device 200 that treats the patient based on instructions from the therapy control module 130 in the respiratory tracking device 100.

The respiratory tracking device and the radiation therapy system provided by the present invention are capable of accurately tracking and treating tumors that move due to the position of the breathing.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

claims

1. A respiration tracking device, characterized by including a respiration control module, an analysis and comparison module and a treatment control module, wherein:

The respiratory control module is connected to the analysis and comparison module, and is used to control the output respiratory flow and respiratory frequency, and send the time trajectory coordinate value of the tumor position movement and the patient's respiratory waveform and frequency to the analysis and comparison module. ;

The analysis and comparison module is connected to the respiratory control module and the treatment control module, receives the time trajectory coordinate value of the tumor position movement and the patient's respiratory waveform and frequency sent by the respiratory control module, and converts the Compare the patient's respiratory waveform and frequency with the respiratory waveform and frequency collected during plan design. When the difference between the patient's respiratory waveform and frequency and the respiratory waveform and frequency collected during plan design is less than or equal to the preset value , instruct the treatment control module to control the treatment device to perform treatment according to the time trajectory coordinate value of the tumor position movement; and

The treatment control module is connected to the analysis and comparison module, and according to the instructions of the analysis and comparison module, controls the treatment device to perform treatment according to the time trajectory coordinate value of the tumor position movement.

2. The respiration tracking device according to claim 1, characterized in that:

When the difference between the patient's respiratory waveform and frequency and the respiratory waveform and frequency collected during plan design is greater than a preset value, the analysis and comparison module instructs the treatment control module to stop treatment.

3. The respiratory tracking device according to claim 1, wherein the respiratory control module further includes a respiratory supply recording module, an image scanning module and a tumor position calculation module, wherein: the respiratory supply and recording module is connected to The tumor position calculation module supplies oxygen to the patient according to the preset respiratory flow and respiratory frequency, records the patient's respiratory waveform and frequency, and sends the patient's respiratory waveform and frequency to the tumor position calculation module; and

The image scanning module is connected to the tumor position calculation module, performs an image scan on the patient while the patient is breathing steadily, and sends the scanned dynamic image of the patient to the tumor position calculation module.

4. The respiration tracking device according to claim 3, characterized in that: The tumor position calculation module is connected to the respiratory supply recording module and the image scanning module, and receives the patient's respiratory waveform and frequency sent by the respiratory supply and recording module and the patient's respiratory waveform sent by the image scanning module. Dynamic image, based on the patient's dynamic image and the patient's respiratory waveform and frequency, calculate the time trajectory coordinate value of the patient's tumor position movement under this respiratory waveform and frequency, and calculate the time of the tumor position movement The trajectory coordinate value and the patient's respiratory waveform and frequency are sent to the analysis and comparison module.

5. The respiratory tracking device according to claim 3, wherein the image scanning range of the patient is at least one complete respiratory frequency cycle.

6. The respiration tracking device according to claim 3, wherein the image scanning module is dynamic CT.

7. A radiotherapy system, characterized by comprising the respiratory tracking device according to any one of claims 1-6.

8. The radiotherapy system according to claim 7, characterized in that: the treatment device treats the patient according to the instructions of the treatment control module in the respiratory tracking device.