Stereotactic radiotherapy equipment for realizing dose tracking

Abstract

The utility model relates to stereotactic radiotherapy equipment for realizing dose tracking, which belongs to the technical field of radiotherapy equipment, and comprises a connecting piece, a dose detection assembly, an accelerator assembly and a folding telescopic mechanism, the interference caused by oblique incidence of the beam and the influence of inaccurate dosage are avoided; the dose detection assembly can follow a beam to carry out full spherical irradiation in real time through the semi-annular structure, in addition, when the dose detection assembly does not need to work or a quality control test is carried out, the dose detection assembly is automatically retracted to an initial position through the folding telescopic mechanism, on one hand, the effect of protecting the dose detection assembly is achieved, and on the other hand, the space is saved; the arrangement of the treatment bed is facilitated, the quality control test is not influenced, and the technical problem that the stereotactic radiotherapy equipment connected with the mechanical arm structure cannot acquire the dosimetry information in the radiotherapy process in real time is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to radiotherapy equipment technical field, concretely relates to a kind of stereotactic radiotherapy equipment of dose tracking implementation. BACKGROUND

[0002] Stereotactic Radiotherapy (SRT) is a high-precision radiotherapy technique applied in the field of radiation oncology, which shows excellent efficacy in small volume tumor treatment and targeted treatment of specific areas. SRT technology realizes precise control of radiation dose distribution by using advanced three-dimensional spatial positioning system, thereby protecting surrounding normal tissues to the greatest extent and reducing unnecessary damage to normal cells.

[0003] The professional advantages of SRT technology include: high spatial resolution: using high-precision image-guided technology to ensure accurate alignment of radiation beams with tumor target areas. Non-invasive treatment characteristics: avoiding the trauma of traditional surgery, providing a more gentle treatment method for patients. Precision of dose control: through accurate calculation of radiation dose, achieving efficient killing of tumor cells while minimizing damage to normal tissues. Treatment adaptability: suitable for various tumor types, including but not limited to brain tumors, lung cancer, liver cancer, etc. Flexibility of treatment planning: able to customize personalized treatment plans according to tumor location and patient anatomy.

[0004] Currently, the structure of stereotactic radiotherapy treatment equipment is limited, and the stereotactic radiotherapy equipment with mechanical arm structure in the prior art cannot realize global surface stereoscopic acquisition of dosimetric information during patient treatment. Moreover, the stereotactic radiotherapy equipment with mechanical arm structure in the prior art cannot realize dose distribution reconstruction during non-public surface treatment, cannot obtain dose changes of target area and critical organs, cannot protect critical organs and improve the coverage rate of target area dose; the analysis of patient radiotherapy dose in the prior art can only be analyzed by the irradiation information obtained through phantom simulation verification, and the actual treatment dose information of the patient cannot be obtained. UTILITY MODEL CONTENT

[0005] In view of the above problems, the utility model provides a kind of stereotactic radiotherapy equipment of dose tracking is realized, the utility model includes connecting piece, dose detection subassembly, accelerator subassembly and folding telescopic mechanism, wherein dose detection subassembly is used to receive the vertical irradiation of beam, avoid the influence of dose inaccuracy caused by beam oblique incidence and interference;Half-ring connection structure can let dose detection subassembly real-time follow beam and carry out global surface irradiation, in addition, when dose detection subassembly does not need to work or carry out quality control test, dose detection subassembly is automatically stowed to initial position by folding telescopic mechanism, on the one hand, play the role of protecting dose detection subassembly, on the other hand, save space, the placement of treatment bed is facilitated, and quality control test is not affected, solve the technical problem that stereotactic radiotherapy equipment connected with mechanical arm structure cannot real-time acquisition dosimetric information in radiotherapy process.

[0006] One purpose of the utility model is to provide a kind of stereotactic radiotherapy equipment of dose tracking is realized, comprising:

[0007] Dose detection subassembly, folding telescopic mechanism, accelerator subassembly and connecting piece;

[0008] The connecting piece is connected with accelerator subassembly and folding telescopic mechanism respectively;Folding telescopic mechanism is also connected with dose detection subassembly;

[0009] The connecting piece is half-ring structure;

[0010] The dose detection subassembly includes dose tracking detection piece;

[0011] The dose detection subassembly is adjusted with the radiation source of accelerator subassembly by folding telescopic mechanism vertically.

[0012] Optionally, the folding telescopic mechanism includes telescopic mechanism one and first rotating piece;

[0013] The first rotating piece is connected with telescopic mechanism one and connecting piece respectively.

[0014] Optionally, the folding telescopic mechanism includes second rotating piece and telescopic mechanism two;

[0015] The second rotating piece is connected with telescopic mechanism one and telescopic mechanism two respectively;Telescopic mechanism two is also connected with dose detection subassembly.

[0016] Optionally, the dose tracking detection piece includes photosensitive diode array, driver and reading module;

[0017] Photosensitive diode array, driver and reading module are sequentially connected, and are arranged in the shell.

[0018] Optionally, the dose detection subassembly further includes shell, and the dose tracking detection piece is arranged in the shell.

[0019] Optionally, further comprising a safety interlock device; the shell is connected with the safety interlock device; in use, when the safety interlock device connected with the shell collides with the human body or the object, the safety interlock is triggered, the folding telescopic mechanism, the dose detection assembly movement, and the irradiation of the accelerator are stopped.

[0020] Optionally, the telescopic mechanism one comprises a sleeve one and a sleeve two, and the sleeve one is sleeved with the sleeve two.

[0021] Optionally, the telescopic mechanism two comprises a sleeve three and a sleeve four, and the sleeve three is sleeved with the sleeve four.

[0022] Optionally, the safety interlock device comprises a membrane switch one, a membrane switch two and a lead-out wire.

[0023] The membrane switch one and the membrane switch two are connected with the upper surface and the lower surface of the shell respectively; the membrane switch one is connected with the membrane switch two through the lead-out wire; and the lead-out wire is further connected with the accelerator assembly.

[0024] Optionally, the membrane switch one and the membrane switch two each comprise a polyester film, a conductive silver paste and / or a conductive carbon paste.

[0025] Compared with the prior art, the utility model has at least the following beneficial effects:

[0026] (1) The utility model is based on the dose detection assembly to obtain the dose information in the radiotherapy process, and provides real data for analyzing the radiotherapy dose.

[0027] (2) In the utility model, the dose detection assembly is connected through the folding telescopic mechanism, the dose detection assembly can be quickly adjusted to the radiation area through the folding telescopic mechanism, the position and distance of the dose detection assembly, the treatment bed and the accelerator are adjusted, the irradiation dose is acquired in real time, the flexible placement of the treatment bed is improved, and the working time of the staff is saved.

[0028] (3) In the utility model, the dose detection assembly and the folding telescopic mechanism can be withdrawn to the side close to the mechanical arm, which is favorable for saving the operation space.

[0029] (4) The utility model can realize the detection of multiple quality control projects through the dose detection assembly, improve the quality control efficiency, and optimize the quality control tool.

[0030] (5) In the utility model, the semi-annular structure carries the medical linear accelerator and the dose detection assembly, realizes the dose distribution reconstruction in the non-public surface treatment process, acquires the dose change of the target area and the critical organ, can better protect the critical organ and improve the coverage rate of the target area dose, provides a reference for the next dose guided radiotherapy and adaptive radiotherapy.

[0031] (6) The dose information obtained by the utility model is recorded digitally, and does not need to be developed by film, so that the information is easier to maintain and helps to transit to paperless work. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings are included to provide a further understanding of the present utility model, and are incorporated herein and constitute a part of this specification. The drawings illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model.

[0033] Figure 1 FIG. 1 is a schematic diagram of the structure of the stereotactic radiotherapy equipment for realizing dose tracking in the present utility model embodiment in the process of treating patients;

[0034] Figure 2 FIG. 2 is a schematic diagram of the structure of the stereotactic radiotherapy equipment for realizing dose tracking in the present utility model embodiment in the process of not treating patients;

[0035] Figure 3 FIG. 3 is a schematic diagram of the structure of the retracting and extending of the lifting mechanism in the folding and telescopic mechanism in the present utility model embodiment;

[0036] Figure 4 FIG. 4 is a schematic diagram of the structure of the dose tracking detection piece in the present utility model embodiment;

[0037] Figure 5 FIG. 5 is a schematic diagram of the safety interlocking device in the present utility model embodiment;

[0038] Figure 6 FIG. 6 is a schematic diagram of the stereotactic radiotherapy equipment for realizing dose tracking in the present utility model embodiment in the process of treating patients.

[0039] REFERENCE NUMERALS:

[0040] Connecting piece 1, dose detection assembly 2, accelerator assembly 3, folding and telescopic mechanism 4, mechanical arm 5, safety interlocking device 6, shell 2-1, dose tracking detection piece 2-2, photosensitive diode array 2-201, driver 2-202, reading module 2-203, accelerator 3-1, telescopic mechanism one 4-1, telescopic mechanism two 4-2, first rotating piece 4-3, second rotating piece 4-4, sleeve one 4-101, sleeve two 4-102, sleeve three 4-201, sleeve four 4-202, membrane switch one 6-1, membrane switch two 6-2, lead-out wire 6-3. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above purpose, features and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. In addition, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0042] One specific embodiment of the present application discloses a kind of stereotactic radiotherapy equipment for dose tracking, Figures 1-6 In order to illustrate the effectiveness of the method of the present application, the above technical solutions of the present application will be described in detail below through a specific embodiment, and the specific implementation steps are as follows:

[0043] One purpose of the present application is to provide a kind of stereotactic radiotherapy equipment for dose tracking, comprising:

[0044] Connecting piece 1, dose detection assembly 2, accelerator assembly 3 and folding telescopic mechanism 4;

[0045] The connecting piece 1 is connected with the accelerator assembly 3 and the folding telescopic mechanism 4 respectively;The folding telescopic mechanism 4 is also connected with the dose detection assembly 2;

[0046] In one embodiment of the present application, the dose detection assembly 2 is arranged on the upper side of the folding telescopic mechanism 4 along the horizontal direction;

[0047] Optionally, the middle position of the connecting piece 1 is connected with a mechanical arm 5, and the mechanical arm 5 controls the 360 rotation of the semi-ring support according to the treatment requirement, for global surface irradiation of the dose detection assembly following the beam in real time;

[0048] The connecting piece 1 is connected with the accelerator assembly 3 and the folding telescopic mechanism 4 respectively, and in the treatment process, the movement of the connecting piece 1 is controlled by the mechanical arm 5, to further adjust the irradiation angle of the accelerator assembly 3 to the human body or the quality control detection phantom;

[0049] Further, the accelerator assembly 3 comprises an accelerator control system and an accelerator 3-1;

[0050] When in use, the dose detection assembly 2 is adjusted to be perpendicular to the radiation source of the accelerator by the folding telescopic mechanism 4;The accelerator control system obtains the lifting adjustment data according to the distance SAD from the radiation source of the accelerator to the central axis of the human body to be measured or the quality control detection phantom, and transmits the data to the folding telescopic mechanism 4;

[0051] Further, the folding telescopic mechanism 4 is used for receiving accelerator control system output lifting adjustment data, automatically adjusting position according to the lifting adjustment data, so that the dose detection assembly can track the accelerator in real time;

[0052] Optionally, the folding telescopic mechanism 4 comprises telescopic mechanism one 4-1, telescopic mechanism two 4-2, first rotating part 4-3 and second rotating part 4-4;

[0053] The first rotating part 4-3 is connected with the telescopic mechanism one 4-1 and the connecting part 1 respectively;

[0054] The second rotating part 4-4 is connected with the telescopic mechanism one 4-1 and the telescopic mechanism two 4-2 respectively;

[0055] The telescopic mechanism two 4-2 is further connected with the dose detection assembly 2;

[0056] The telescopic mechanism one 4-1 comprises sleeve one 4-101 and sleeve two 4-102, and the sleeve one is sleeved with the sleeve two;

[0057] The telescopic mechanism two 4-2 comprises sleeve three 4-201 and sleeve four 4-202, and the sleeve three 4-201 is sleeved with the sleeve four 4-202;

[0058] In one embodiment of the utility model, when non-treatment or non-quality control detection is carried out, the sleeve two 4-102 in the telescopic mechanism one in the folding telescopic mechanism 4 is retracted into the sleeve one, the sleeve four 4-202 in the telescopic mechanism two is retracted into the sleeve three 4-201, the second rotating part 4-4 is rotated to fold the telescopic mechanism one and the telescopic mechanism two, and then the first rotating part 4-3 is rotated to rotate the telescopic mechanism one, the telescopic mechanism two and the dose detection assembly 2 to the side close to the mechanical arm 5, thereby saving operation space.

[0059] When treatment or quality control detection is carried out, the first rotating part 4-3 is controlled to rotate, the telescopic mechanism one, the telescopic mechanism two and the dose detection assembly 2 are rotated to the side away from the mechanical arm 5, and then the second rotating part 4-4 is rotated to place the dose detection assembly 3 to the appropriate position by adjusting the positions of the telescopic mechanism one and the telescopic mechanism two.

[0060] Further, the telescopic range of the telescopic mechanism one and the telescopic mechanism two and the radius of the connecting part have a proportional relationship of 9-17:12;

[0061] Illustratively, the telescopic range of the telescopic mechanism one and the telescopic mechanism two is 90-170cm;

[0062] The radius of the connecting part is 120cm.

[0063] Illustratively, the shell 2-1 is a cuboid shell.

[0064] Further, the size of the shell 2-1 is 15cmx15cmx10cm;

[0065] The material of the shell 2-1 is amorphous selenium;

[0066] Further, the dose detection assembly 2 comprises a shell 2-1 and a dose tracking detection piece 2-2, which is arranged in the shell 2-1; the dose detection assembly 2 is used to track the accelerator in real time and obtain the dose information of the irradiated human body or quality control detection phantom;

[0067] The dose tracking detection piece 2-2 is used to convert the X-rays emitted by the accelerator into electric charges representing images, forming a dose distribution image, which is compared with the planned dose in the radiotherapy planning system TPS to obtain errors;

[0068] Further, the dose tracking detection piece 2-2 comprises input of image information (in dicom format), output of image information and dose analysis function.

[0069] The dose tracking detection piece 2-2 comprises a photosensitive diode array 2-201, a driver 2-202 and a reading module 2-203;

[0070] The photosensitive diode array 2-201, the driver 2-202 and the reading module 2-203 are sequentially connected and arranged in the shell 2-1;

[0071] The photosensitive diode array 2-201 is used to receive X-rays and convert them into electric signals; the photosensitive diode array comprises a plurality of pixels, each pixel comprising a photosensitive diode and a thin film transistor, the photosensitive diode acting as a capacitor, the absorbed light being captured and converted into electric charges, the electric charges being converted into digital signals to obtain the information of the specific pixel.

[0072] The driver 2-202 is used to activate analog signals; the reading module 2-203 is used to read electronic devices, convert electric charges into analog signals, convert the analog signals into digital signals and transmit them to the image management system; it can be understood that the image management system performs and manages images and processes and stores image calibration data;

[0073] The image management system and the dose tracking detection piece software are independently installed on a set of computers, and the image management system inputs or outputs image information dicom format files to the dose detection assembly software or other subsystems of the accelerator.

[0074] The utility model also includes safety interlocking device 6, the casing 2-1 connects safety interlocking device 6, when the safety interlocking device connected on casing 2-1 collides human body or object, under the action of 50N above's impact force, triggers safety interlocking, stops folding telescopic mechanism, dose detection subassembly movement, stops the irradiation of accelerator.

[0075] Optionally, the safety interlocking device 6 includes a membrane switch 6-1, a membrane switch 6-2, and a lead wire 6-3.

[0076] The membrane switch 6-1 and the membrane switch 6-2 each include a polyester film, conductive silver paste, and conductive carbon paste. The conductive silver paste and the conductive carbon paste are respectively disposed on the polyester film. The thickness of the polyester film (PET) is about 0.05 mm.

[0077] The membrane switch 6-1 and the membrane switch 6-2 are respectively connected to the upper and lower surfaces of the casing 2-1. The membrane switch 6-1 is connected to the membrane switch 6-2 through the lead wire 6-3. The lead wire 6-3 is also connected to the accelerator assembly 3.

[0078] When the membrane switch 6-1 contacts a patient or other equipment, it indicates that the dose detection subassembly 2 contacts the patient or other equipment. Then, an interlocking electrical signal is generated between the membrane switch 6-1 and the membrane switch 6-2. The interlocking electrical signal is transmitted to the accelerator control system through the lead wire 6-3 to control the accelerator 3-1 to stop working.

[0079] In one embodiment of the utility model, in the non-treatment state, the dose detection subassembly 2 is arranged in the initial position along the horizontal direction. The radioactive source of the accelerator assembly 3 is perpendicular to the dose detection subassembly 2.

[0080] In the treatment state, according to the actual situation of the patient's body or the to-be-irradiated structure of the quality control detection phantom, the patient's body or the quality control detection phantom and the dose detection subassembly are lifted to the corresponding positions along the vertical direction, i.e., the distance between the radioactive source of the accelerator 3-1 and the dose detection subassembly is 100-140 cm.

[0081] Another object of the utility model is to provide a use method of the stereotactic radiotherapy equipment for dose tracking, which comprises the following steps:

[0082] S1, calibrate the calibrated stereotactic radiotherapy equipment for dose tracking to obtain the calibrated stereotactic radiotherapy equipment for dose tracking.

[0083] S2, establish a treatment plan for a patient in a treatment planning system. The treatment plan includes a treatment target area and a planned treatment dose.

[0084] The accelerator assembly 3 irradiates the patient according to the treatment plan;

[0085] In step S3, the actual irradiation dose is acquired by the dose detection assembly 2;

[0086] The remaining unirradiated planned dose in the treatment plan is acquired based on the actual irradiation dose;

[0087] In step S4, the actual irradiation dose and the remaining unirradiated planned dose are cumulatively superimposed in the treatment planning system to obtain an overall planned distribution, and the dose variation of the treatment target region and the critical organ is analyzed based on the overall planned distribution to obtain an analysis result;

[0088] In step S5, whether to continue the patient treatment plan is evaluated based on the analysis result.

[0089] Optionally, in step five, whether to continue the patient treatment plan is evaluated based on the analysis result, and if yes, the patient treatment plan is continued, and if no, the patient treatment plan is modified.

[0090] In the utility model, the actual dose variation of the treatment target region and the critical organ is evaluated, the critical organ can be better protected, and the coverage rate of the target region dose is improved, which provides a reference for the next dose-guided radiotherapy and adaptive radiotherapy.

[0091] Preferably, the specific steps of obtaining the calibrated stereotactic radiotherapy equipment for realizing dose tracking in step S1 include:

[0092] In step S11, the quality control detection phantom is placed on the treatment bed, the center positions of the quality control detection phantom, the radiation source of the accelerator 3-1 and the dose detection assembly 2 are aligned, and the initial position of the quality control detection phantom is adjusted;

[0093] In step S12, a plurality of collimators with different radiation rates of the accelerator 3-1 are selected, and the quality control detection phantom in the initial position is irradiated by using different doses of MU respectively to obtain the tracking dose of the quality control detection phantom;

[0094] The tracking dose of the quality control detection phantom is taken as the calibration value of the dose detection assembly 2, and a dose tracking linear relationship is established;

[0095] In step S13, a detector is selected, a plurality of collimators with different radiation rates are selected to irradiate the detector, and the tracking dose of the detector is obtained by the dose detection assembly 2;

[0096] The tracking dose of the detector is used to verify the calibration value of the dose detection assembly for the first time based on the dose tracking linear relationship;

[0097] Step S14, based on the tracking dose of the quality control detection phantom in step S12 and the dose tracking linear relationship, the calibration value of the dose detection assembly is verified for the second time, and a second-verified dose detection assembly 2 is obtained;

[0098] Step S15, creating a treatment plan for the patient;

[0099] The accelerator 3-1 irradiates the patient according to the treatment plan, and the actual irradiation dose is obtained based on the second-verified dose detection assembly 2;

[0100] Step S16, analyzing the actual irradiation dose and the planned treatment dose in step S15 according to the dose tracking linear relationship and the analysis condition, and obtaining an analysis result one;

[0101] If the analysis result one meets the analysis condition, i.e., the dose detection assembly is verified to be effective, the next step is entered, and if it does not meet the analysis condition, steps S11-S15 are repeated;

[0102] Step S17, selecting a detector, repeating steps S15-S16, and obtaining an analysis result two;

[0103] Comparing the analysis result one and the analysis result two, whether the result difference is within an acceptable range; if the result is acceptable, a calibrated stereotactic radiotherapy equipment for realizing dose tracking is obtained.

[0104] Further, the specific steps of obtaining the calibrated stereotactic radiotherapy equipment for realizing dose tracking in step S1 include:

[0105] Step S11, selecting a quality control detection phantom; placing the quality control detection phantom on the isocenter of the treatment bed, aligning the center positions of the quality control detection phantom, the radiation source of the accelerator 3-1 and the dose detection assembly 2 according to the external laser lamp, and adjusting the initial position of the quality control detection phantom;

[0106] Step S12, selecting a plurality of collimators with different radiation rates of the accelerator 3-1;

[0107] Each group of collimators 3-1 irradiates the quality control detection phantom in the initial position with different dose MUs, and the tracking dose of the quality control detection phantom is obtained based on the dose detection assembly 2;

[0108] The tracking dose of the quality control detection phantom is taken as the calibration value of the dose detection assembly 2;

[0109] The dose tracking linear relationship is established based on the calibration value of the dose detection assembly 2;

[0110] Step S13, selecting a detector; placing the detector at the isocenter of the treatment bed, selecting a plurality of collimators with different radiation rates in the accelerator, each group of collimators selecting a different dose MU to irradiate the detector according to the clinical dose rate, and obtaining the tracking dose of the detector through the dose detection assembly 2;

[0111] The tracking dose of the detector is based on the dose tracking linear relationship to verify the calibration value of the dose detection assembly for the first time; and the dose detection assembly 2 after the first verification is obtained.

[0112] Preferably, the detector is a semiconductor matrix detector SRS MapCHECK.

[0113] Preferably, the clinical dose rate is 1000MU / min.

[0114] The different doses include 10MU-2000MU, with every 50MU as a unit.

[0115] Step S14, randomly extracting a plurality of groups of data of the tracking dose of the quality control detection phantom in step S12, verifying the calibration value of the dose detection assembly for the second time based on the dose tracking linear relationship, and obtaining the dose detection assembly 2 after the second verification.

[0116] Step S15, creating a treatment plan for a patient in a treatment planning system; the treatment plan includes a static target region treatment dose, a static target region treatment dose, a dynamic target region treatment dose, and a dynamic target region treatment dose.

[0117] The accelerator 3-1 irradiates the patient according to the treatment plan, and obtains the actual irradiation dose based on the dose detection assembly 2 after the second verification; the actual irradiation dose includes a static target region actual irradiation dose and a dynamic target region actual irradiation dose.

[0118] Step S16, analyzing the static target region actual irradiation dose, the dynamic target region actual irradiation dose, and the static target region planned treatment dose and the dynamic target region planned treatment dose in step S15 according to the dose tracking linear relationship and the analysis condition to obtain an analysis result one.

[0119] If the analysis result one meets the analysis condition, i.e., the dose detection assembly is verified to be effective, the next step is entered, and if it does not meet the analysis condition, steps S11-S15 are repeated.

[0120] Optionally, the analysis condition in step S16 is a static target region plan, the threshold value is 50%, the standard is 2% / 2mm, and the γ pass rate is above 90%; for a dynamic target region tracking plan, the threshold value is 50%, the standard is 3% / 3mm, and the γ pass rate is above 90%.

[0121] Step S17, select the detector, repeat steps S15-S16, get the analysis result two;

[0122] Compare the analysis result one and analysis result two, whether the difference is in the acceptable 5% range; if the result is acceptable, the accelerator assembly 3 meets the clinical requirements, and a calibrated stereotactic radiotherapy equipment for realizing dose tracking is obtained, otherwise, check the clinical performance of the accelerator assembly 3.

[0123] In an embodiment of the utility model, the stereotactic radiotherapy equipment for realizing dose tracking is used for quality control test, including: evaluating position accuracy, isocenter accuracy, patient quality control plan DQA test and providing overall accuracy information of complex target area dose in non-isocentric treatment plan.

[0124] Exemplarily, the specific steps of using the stereotactic radiotherapy equipment for realizing dose tracking for mechanical part quality control include:

[0125] In the patient treatment QA mode, set up the Picket Fence test under different gantry angles;

[0126] The dose line arranged in the dose tracking detection piece 2-2 is evaluated to determine whether the position is accurate.

[0127] Exemplarily, the specific steps of using the stereotactic radiotherapy equipment for realizing dose tracking for isocenter accuracy test include:

[0128] In the patient treatment QA mode, the images of the dose detection assembly under the gantry angles of 0°, 90°, 180°, 270° and the rotating bed 45°, 90°, 315° are sequentially taken.

[0129] The difference between the center of the dose detection assembly and the isocenter is analyzed, and the deviation should be less than 1mm.

[0130] Exemplarily, the specific steps of using the stereotactic radiotherapy equipment for realizing dose tracking for providing accuracy information of target area dose in non-isocentric treatment plan include:

[0131] a) Calibrate the dose detection assembly 2 to obtain the reference value;

[0132] b) In the treatment planning system, the CT image data of the phantom is imported, the original treatment plan plan QA template and the dose distribution of the original treatment plan are established;

[0133] c) In the treatment planning system, the patient treatment plan is formulated;

[0134] d) Import the patient treatment plan into the original treatment plan plan QA template to establish the patient treatment plan plan QA;

[0135] e) performing a patient treatment plan QA, obtaining an actual dose distribution of the patient treatment plan plan QA based on the dose probe assembly 2;

[0136] f) analyzing the difference between the actual dose distribution of the patient treatment plan plan QA and the dose distribution of the original treatment plan, determining whether the difference meets the clinical requirements.

[0137] It can be understood that the clinical requirements include: a threshold of 50%, a standard of 2% / 2 mm, and a pass rate requirement of more than 90%. For a plan of synchronous respiratory tracking, the threshold is 50%, the standard is 3% / 3 mm, and the pass rate requirement is also more than 90%.

[0138] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A stereotactic radiotherapy device for dose tracking, characterized in that, include: Dose detection assembly (2), folding telescopic mechanism (4), accelerator assembly (3) and connector (1); The connector (1) is connected to the accelerator assembly (3) and the folding telescopic mechanism (4) respectively; the folding telescopic mechanism (4) is connected to the dose detection assembly (2); The connector (1) has a semi-circular structure; The dose detection component (2) includes a dose tracking detector (2-2); The dose detection assembly (2) is adjusted to be perpendicular to the radiation source of the accelerator assembly (3) by means of the folding telescopic mechanism (4).

2. The stereotactic radiotherapy device for dose tracking according to claim 1, characterized in that, The folding telescopic mechanism (4) includes a telescopic mechanism (4-1) and a first rotating component (4-3). The first rotating component (4-3) is connected to the telescopic mechanism (4-1) and the connecting component (1) respectively.

3. The stereotactic radiotherapy device for dose tracking according to claim 2, characterized in that, The folding telescopic mechanism (4) includes a second rotating component (4-4) and a second telescopic mechanism (4-2). The second rotating component (4-4) is connected to the first telescopic mechanism (4-1) and the second telescopic mechanism (4-2) respectively; the second telescopic mechanism (4-2) is also connected to the dose detection component (2).

4. The stereotactic radiotherapy device for dose tracking according to claim 1, characterized in that, The dose tracking detector (2-2) includes a photodiode array (2-201), a driver (2-202), and a readout module (2-203). The photodiode array (2-201), driver (2-202), and read module (2-203) are connected in sequence.

5. The stereotactic radiotherapy device for dose tracking according to claim 1, characterized in that, The dose detection component (2) also includes a housing (2-1), and the dose tracking detector (2-2) is disposed inside the housing (2-1).

6. The stereotactic radiotherapy device for dose tracking according to claim 5, characterized in that, It also includes a safety interlock device (6); the housing (2-1) is connected to the safety interlock device (6).

7. The stereotactic radiotherapy device for dose tracking according to claim 2, characterized in that, The telescopic mechanism 1 (4-1) includes sleeve 1 (4-101) and sleeve 2 (4-102), and sleeve 1 and sleeve 2 are sleeved together.

8. The stereotactic radiotherapy device for dose tracking according to claim 3, characterized in that, The telescopic mechanism two (4-2) includes sleeve three (4-201) and sleeve four (4-202), and sleeve three and sleeve four are sleeved together.

9. The stereotactic radiotherapy device for dose tracking according to claim 6, characterized in that, The safety interlock device (6) includes a membrane switch one (6-1), a membrane switch two (6-2), and a lead wire (6-3). The membrane switch one (6-1) and membrane switch two (6-2) are respectively connected to the upper and lower surfaces of the housing (2-1); the membrane switch one (6-1) is connected to the membrane switch two (6-2) through the lead wire (6-3); the lead wire (6-3) is also connected to the accelerator assembly (3).

10. The stereotactic radiotherapy device for dose tracking according to claim 9, characterized in that, The materials of the membrane switch one (6-1) and membrane switch two (6-2) include polyester film, conductive silver paste and / or conductive carbon paste.

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