CN220175885U - Proton heavy ion treatment laser positioning device - Google Patents
Proton heavy ion treatment laser positioning device Download PDFInfo
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- CN220175885U CN220175885U CN202321598667.7U CN202321598667U CN220175885U CN 220175885 U CN220175885 U CN 220175885U CN 202321598667 U CN202321598667 U CN 202321598667U CN 220175885 U CN220175885 U CN 220175885U
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- 238000001959 radiotherapy Methods 0.000 claims abstract description 31
- 238000002665 ion therapy Methods 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 9
- 150000002500 ions Chemical class 0.000 description 14
- 230000009897 systematic effect Effects 0.000 description 4
- 206010028980 Neoplasm Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model provides a proton heavy ion treatment laser positioning device, which comprises a plurality of fixedly installed laser lamps and a movable laser lamp; the fixedly installed laser lamp is arranged to emit a cross laser line by taking the isocenter of the radiotherapy device as a focus; the movable laser lamp is arranged on a laser lamp guide rail above the treatment bed surface, and the movable laser lamp emits a line-shaped laser line passing through the isocenter of the radiotherapy device, and the line-shaped laser line passes through a vertical plane parallel to the isocenter of the radiotherapy device and the fourth laser lamp. The proton heavy ion treatment laser positioning device can realize the direct positioning of the treatment bed at a non-orthogonal angle during non-coplanar irradiation, and is convenient for the positioning process.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and particularly relates to a proton heavy ion treatment laser positioning device.
Background
Proton heavy ion radiotherapy is a process of killing cancer cells by utilizing high-energy protons or heavy ions, the dosage of the protons after entering a human body forms a Bragg peak along with the depth, the particle energy is rapidly released within a short distance at the end of a range, the concentrated blasting of tumors is facilitated, meanwhile, the damage to healthy tissues is reduced, compared with conventional radiotherapy, the precision of the proton heavy ion radiotherapy is high, the focus can be irradiated more accurately, the dosage can also fall down rapidly, the tumors can be hit accurately, and the toxic and side effects are small.
In general, proton heavy ion devices all comprise a treatment head and a treatment bed, the treatment head can be mounted on a frame with a fixed angle, a rotating frame with a section of arc length or a rotating frame with a circle of rotation, the treatment bed consists of a mechanical arm capable of six-dimensional movement and a bed surface, and different types of frames and the treatment bed with the mechanical arm are matched for use, so that beams can be incident to different parts of a human body from different directions, and in this context, the scene of non-coplanar irradiation is frequently used in the proton heavy ion treatment method.
In general, a plurality of indoor laser lamps are arranged, laser lines of the laser lamps are arranged on a plane and form a line on an object, when a patient is positioned, the laser lines are arranged on the coronal position, the sagittal position and the axial position of the human body, and the laser lines arranged on different positions are mutually perpendicular and focused on an isocenter.
Currently, the laser lamp installed in the radiotherapy room is basically fixed and immovable. When the long axis of the treatment bed in a certain irradiation field and the rotating shaft of the frame are not in the same plane, the treatment bed is in an angle during non-coplanar irradiation, so that a human body lying on the treatment bed is also in an angle along with the treatment bed, and at the moment, a laser line in the head and foot direction of the human body cannot be used for positioning because the laser line and a marking line in the head and foot direction of the human body are in an angle, and whether the laser line is aligned with the marking line of the human body cannot be judged. That is, laser lines directed at the head and foot of the patient are not available when the couch is at a non-coplanar angle in the treatment plan.
Therefore, the positioning can only be performed at an orthogonal angle, such as the positioning performed when the treatment couch revolves by 0 ° or 90 °, and then the treatment couch is rotated to a target angle, so that the positioning process becomes less intuitive and a rotation movement error of the treatment couch is introduced.
Specifically, in proton heavy ion therapy, the target area is planned to be obtained by expanding the clinical target area by different amounts in the head-foot direction, the left-right direction and the front-rear direction of the human body, the expansion in different directions is determined by different factors, the expansion in the head-foot direction and the left-right direction is determined by a positioning error and a systematic error, and the expansion in the front-rear direction is determined by a dose drop gradient of the beam. The positioning error is caused by the deviation of the position of the next positioning and the treatment plan due to different positioning at each time, and the position of the treatment plan is determined by the positioning position during the scanning CT simulation, so the positioning error can be also understood as the deviation of the current positioning position and the positioning position during the scanning CT simulation; the systematic error is an error due to the systematic existence of systematic accuracy. By accurately judging the positioning error and the system error, the size of the outer expansion can be reasonably small, fewer tissues and organs are irradiated, and side effects are smaller, so that the judgment of the positioning error and the system error is important.
In the prior art, under the condition of coplanar irradiation, the position error can be judged by the coincidence of a laser line and a mark line on a human body by a visual method. However, in the case of non-coplanar illumination, it is not possible to directly determine how much of the positioning error is, but only when the couch is at an orthogonal angle, the couch is rotated to the target angle, and the positioning error at this time has introduced a rotational motion error of the couch.
In order to solve the problems, the utility model provides a proton heavy ion treatment laser positioning device.
Disclosure of Invention
The utility model aims to provide a proton heavy ion treatment laser positioning device, which is used for realizing direct positioning of a treatment bed at a non-orthogonal angle during non-coplanar irradiation and is convenient for the positioning process.
In order to achieve the above object, the present utility model provides a proton heavy ion therapy laser positioning device, which is installed in a treatment room with a radiotherapy device, the radiotherapy device includes a treatment couch surface, the treatment couch surface is used for placing a human body, a phantom body or an instrument, and the treatment couch surface includes a plurality of fixedly installed laser lamps and a movable laser lamp; the fixedly installed laser lamp is arranged to emit a cross laser line by taking an isocenter of the radiotherapy device as a focus; the movable laser lamp is arranged on a laser lamp guide rail above the treatment bed surface, the movable laser lamp emits a straight laser line passing through the isocenter of the radiotherapy device, and the straight laser line passes through a vertical plane parallel to the isocenter of the radiotherapy device and the fourth laser lamp.
The whole shape of the laser lamp guide rail is arc-shaped or curved.
The overall shape of the laser light guide rail is circular arc with a central axis and the central axis is vertical and passes through the isocenter of the radiotherapy device, and the radius of the laser light guide rail is at least larger than the long axis of the treatment couch top.
The movable laser lamp is connected with an irradiation control terminal through a laser lamp driving device, each position on the laser lamp guide rail corresponds to each treatment planning angle one by one, and the laser lamp driving device is arranged to receive the treatment couch planning angle from the irradiation control terminal and drive a fourth laser lamp to move to the position on the laser lamp guide rail corresponding to the treatment couch planning angle according to the treatment couch planning angle.
The irradiation control terminal is set to acquire the planned angle of the treatment bed and send the planned angle, and is a computer.
The arc length L of the fourth laser lamp moving on the laser lamp guide rail is as follows:
wherein n is the angle of the fourth laser lamp to be moved, the value is the difference between the treatment plan angle and the current angle of the fourth laser lamp relative to the isocenter, R is the distance between the fourth laser lamp and the isocenter, and Pi is the circumference ratio.
The laser lamp of fixed mounting includes first laser lamp, first laser lamp installs directly over the treatment bed surface for the cross laser line that first laser lamp was beaten out is beaten in human, die body or instrument's head foot direction and left and right sides direction.
The laser lamp of fixed mounting includes second laser lamp and third laser lamp, second laser lamp and third laser lamp are installed on the same height of the both sides of treatment bed surface for the cross laser line that second laser lamp and third laser lamp were beaten out is beaten in human, die body or instrument's head foot direction and fore-and-aft direction.
The specific heights of the second laser lamp and the third laser lamp are set so that the cross laser lines emitted by the second laser lamp and the third laser lamp propagate through the isocenter of the radiotherapy device along the horizontal direction.
The proton heavy ion treatment laser positioning device well solves the problem that whether the laser line is aligned with the human body mark line or not can not be judged in non-coplanar irradiation, specifically, the fourth laser lamp emitting the linear laser line is movable and can move to a treatment plan angle corresponding to a treatment bed used in an irradiation field, and the linear laser line passes through a vertical plane parallel to the isocenter of the radiotherapy device and the fourth laser lamp, so that whether the laser line is aligned with the mark line on the human body or not can be intuitively judged in non-coplanar irradiation, the direct positioning of the treatment bed at a non-orthogonal angle in the non-coplanar irradiation can be realized, and the positioning process in the non-coplanar irradiation is convenient.
The utility model well solves the problem that the positioning error can not be directly judged when the non-coplanar irradiation is performed, and the user can visually judge the positioning error without introducing the rotating motion error of the treatment bed by positioning the patient at a non-orthogonal angle.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of a proton heavy ion therapy laser positioning device according to the present utility model;
fig. 2 is a schematic diagram of the working principle of the laser lamp driving device and the irradiation control terminal of the proton heavy ion treatment laser positioning device of the utility model;
fig. 3 is a schematic top view of an actual usage scenario of the proton heavy ion therapy laser positioning device of the present utility model.
Fig. 4 is a schematic view of the orientation of a person lying on his back on a bed surface.
In the figure, 11, a first laser lamp; 12. a second laser lamp; 13. a manikin; 14. a treatment couch surface; 15. a third laser lamp; 16. a laser lamp guide rail; 17. a fourth laser lamp; 21. an operator; 22. an irradiation control terminal; 23. a laser lamp driving device.
Detailed Description
The utility model will be further illustrated with reference to specific examples. It should be understood that the following examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model.
As shown in fig. 1-3, a proton heavy ion therapy laser positioning device according to an embodiment of the present utility model is installed in a treatment room with a radiotherapy apparatus, the radiotherapy apparatus comprising a treatment couch top 14, the treatment couch top 14 being used for positioning a human body, a phantom or an instrument 13. Cross marks are drawn on both sides and the front surface of the human body, the die body or the instrument, and the cross marks are used for aligning cross laser rays emitted by the laser positioning device during positioning.
As shown in fig. 1 and 3, the proton heavy ion therapy laser positioning device comprises a first laser lamp 11, a second laser lamp 12, a third laser lamp 15, and a fourth laser lamp 17, wherein the fourth laser lamp 17 is a movable laser lamp, and is mounted on a laser lamp guide rail 16 above a therapy couch surface 14.
The first laser lamp 11 is installed right above the treatment couch surface 14, and the first laser lamp 11 is configured to emit a cross laser line with an isocenter of the radiotherapy apparatus as a focus, so that the cross laser line emitted by the first laser lamp 11 is emitted in a head-foot direction and a left-right direction of a human body, a phantom or an instrument, and the cross laser line is used for aligning with a marking line on the human body, the phantom or the instrument when the radiotherapy apparatus is positioned. The first laser lamp 11 is fixedly installed, and thus is not movable.
The second laser lamp 12 and the third laser lamp 15 are installed at the same height on both sides of the treatment couch top 14, and are configured to emit a cross laser line with the isocenter as a focus, whereby the cross laser lines emitted from the second laser lamp 12 and the third laser lamp 15 are emitted in the head-foot direction and the front-rear direction of the human body, the phantom or the instrument. The cross laser line is used to align the marker line on the human body when it is positioned.
The specific heights of the second and third laser lamps 12 and 15 are set such that the cross laser lines emitted from the second and third laser lamps 12 and 15 propagate in the horizontal direction through the isocenter of the radiotherapy apparatus. The second laser lamp 12 and the third laser lamp 15 are fixedly installed, and thus are not movable.
The fourth laser light 17 is mounted on the laser light guide 16 above the treatment couch top 14. Wherein the overall shape of the laser light guide rail 16 is circular arc with a central axis and the central axis of the laser light guide rail 16 is vertical and passes through the isocenter of the radiotherapy apparatus. The laser light guide 16 is mounted on the ceiling of the treatment room above the treatment couch top 14, the radius of the laser light guide 16 being at least greater than the long axis of the treatment couch top 14.
In other embodiments, the overall shape of the laser light guide rail 16 may be other than a circular arc, but may be other shapes such as a curved surface, so long as the fourth laser light 17 on the laser light guide rail 16 is disposed at any position on the laser light guide rail 16, and the line of laser light emitted by the fourth laser light 17 passes through the isocenter of the radiotherapy apparatus and is parallel to the isocenter of the radiotherapy apparatus and the vertical plane in which the fourth laser light 17 is located.
In the present embodiment, the fourth laser lamp 17 is connected to an irradiation control terminal 22 through a laser lamp driving device 23, thereby realizing automatic movement of the fourth laser lamp 17. The positions on the laser light guide rail 16 are in one-to-one correspondence with the treatment planning angles, and the laser light driving device 23 is configured to receive the treatment couch planning angles from the irradiation control terminal 22 and drive the fourth laser light to move to the position on the laser light guide rail 16 corresponding to the treatment couch planning angles according to the treatment couch planning angles. In other embodiments, it is also contemplated to manually adjust the position of the fourth laser light 17 on the laser light guide rail 16.
The fourth laser light 17 is movable along a laser light guide 16, the fourth laser light 17 being arranged to emit a line of laser light passing through the isocenter of the radiotherapy apparatus, the line of laser light passing through a vertical plane parallel to the isocenter of the radiotherapy apparatus and the fourth laser light 17, whereby the direction of the line of laser light coincides with the treatment planning angle of the treatment couch top 14. When there is a rotation angle of the couch top 14 in the plan (i.e., non-coplanar irradiation), it is necessary to acquire the couch plan angle and move the fourth laser 17 to a position on the laser light guide rail 16 corresponding to the couch plan angle. Thus, when the couch is rotated (i.e., not co-planar illuminated), a line of laser light can be present in the direction of the human head and foot for alignment with the marker line.
The arc length L of the fourth laser 17 moving on the laser guide rail 16 is calculated as follows:
wherein n is the angle of the fourth laser lamp to be moved, the value is the difference between the treatment plan angle and the current angle of the fourth laser lamp relative to the isocenter, R is the distance between the fourth laser lamp and the isocenter, and Pi is the circumference ratio.
The irradiation control terminal 22 is configured to acquire and transmit the treatment couch planning angle. The irradiation control terminal 22 is preferably a computer.
The laser light driving device 23 is configured to receive the couch planning angle from the irradiation control terminal 22 and drive the fourth laser light 17 to move to a position on the laser light guide rail 16 corresponding to the couch planning angle according to the couch planning angle.
As shown in fig. 2, the irradiation control terminal 22 is specifically configured to:
step S1': loading a treatment plan for the patient in response to an operator operation;
wherein the patient's treatment plan is pre-stored in a computer, including the treatment couch planning angle.
Step S2': identifying a treatment couch plan angle in the treatment plan;
step S3': whether the current angle of the treatment couch top 14 is the treatment couch plan angle is determined, if yes, step S4' is performed, otherwise, the treatment couch top 14 is driven to move to the treatment couch plan angle.
Step S4': the couch planning angle is sent to the laser lamp driving apparatus 23 such that the laser lamp driving apparatus 23 drives the fourth laser lamp 17 to move to a position on the laser lamp rail 16 corresponding to the couch planning angle.
Thus, based on the proton heavy ion treatment laser positioning device, the realized proton heavy ion treatment non-coplanar irradiation laser positioning method comprises the following steps:
step S1: loading a treatment plan of the patient with the irradiation control terminal 22 in response to an operation of the operator 21;
step S2: identifying a couch plan angle in the treatment plan using the irradiation control terminal 22;
step S3: the irradiation control terminal 22 is used to determine whether the current angle of the treatment couch top 14 is the treatment couch plan angle, if so, step S4 is performed, otherwise, the treatment couch top 14 is driven to move to the treatment couch plan angle.
Step S4: the couch planning angle is sent to the laser lamp driving device 23 by the irradiation control terminal 22, and the fourth laser lamp 17 is driven to move to a position on the laser rail 16 corresponding to the couch planning angle by the laser lamp driving device 23.
Step S5: the marking lines in the head-foot direction are aligned by using the linear laser lines which are shot by the fourth laser lamp 17, and the deviation value of the fourth laser lamp 17 and the marking lines is measured;
step S6: the second laser lamp 12 and the third laser lamp 15 are aligned with the marking lines on the two sides of the human body, the mold body or the instrument, respectively, and the deviation values of the second laser lamp 12 and the third laser lamp 15 from the marking lines are measured.
The proton heavy ion treatment laser positioning device well solves the problem that whether the laser line is aligned with the human body mark line or not can not be judged in non-coplanar irradiation, specifically, the fourth laser lamp emitting the linear laser line is movable and can move to a treatment plan angle corresponding to a treatment bed used in an irradiation field, and the linear laser line passes through a vertical plane parallel to the isocenter of the radiotherapy device and the fourth laser lamp, so that whether the laser line is aligned with the mark line on the human body or not can be intuitively judged in non-coplanar irradiation, the direct positioning of the treatment bed at a non-orthogonal angle in the non-coplanar irradiation can be realized, and the positioning process in the non-coplanar irradiation is convenient.
The utility model well solves the problem that the positioning error can not be directly judged when the non-coplanar irradiation is performed, and the user can visually judge the positioning error without introducing the rotating motion error of the treatment bed by positioning the patient at a non-orthogonal angle.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the scope of the present utility model, and various modifications can be made to the above-described embodiment of the present utility model. All simple, equivalent changes and modifications made in accordance with the claims and the specification of the present application fall within the scope of the patent claims. The present utility model is not described in detail in the conventional art.
Claims (9)
1. A proton heavy ion treatment laser positioning device which is arranged in a treatment room with a radiation treatment device, wherein the radiation treatment device comprises a treatment bed surface used for placing a human body, a die body or an instrument, and the proton heavy ion treatment laser positioning device is characterized by comprising a plurality of fixedly arranged laser lamps and a movable fourth laser lamp; the fixedly installed laser lamp is arranged to emit a cross laser line by taking an isocenter of the radiotherapy device as a focus; the movable laser lamp is arranged on a laser lamp guide rail above the treatment bed surface, the movable laser lamp emits a straight laser line passing through the isocenter of the radiotherapy device, and the straight laser line passes through a vertical plane parallel to the isocenter of the radiotherapy device and the fourth laser lamp.
2. The proton heavy ion therapy laser positioning device of claim 1, wherein the overall shape of the laser light guide rail is circular arc or curved.
3. The proton heavy ion therapy laser positioning device of claim 2, wherein the overall shape of the laser light guide rail is circular arc with a central axis and the central axis is vertical and passes through an isocenter of the radiotherapy device, and the radius of the laser light guide rail is at least greater than the long axis of the treatment couch top.
4. The proton heavy ion therapy laser positioning apparatus according to claim 1, wherein the movable laser lamp is connected to an irradiation control terminal through a laser lamp driving device, each position on the laser lamp guide rail corresponds to each treatment planning angle one by one, and the laser lamp driving device is configured to receive the treatment couch planning angle from the irradiation control terminal and drive the fourth laser lamp to move to the position on the laser lamp guide rail corresponding to the treatment couch planning angle according to the treatment couch planning angle.
5. The proton heavy ion therapy laser positioning apparatus of claim 4, wherein the irradiation control terminal is configured to acquire and transmit a treatment couch planning angle, and the irradiation control terminal is a computer.
6. The proton heavy ion therapy laser positioning device according to claim 1The device is characterized in that the arc length L of the fourth laser lamp moving on the laser lamp guide rail is as follows:，
wherein n is the angle of the fourth laser lamp to be moved, the value is the difference between the treatment plan angle and the current angle of the fourth laser lamp relative to the isocenter, R is the distance between the fourth laser lamp and the isocenter, and Pi is the circumference ratio.
7. The proton heavy ion therapy laser positioning device of claim 1, wherein the fixedly mounted laser lamp comprises a first laser lamp mounted directly above the treatment couch top such that the cross laser line emitted by the first laser lamp is directed in the head-foot direction and left-right direction of the human body, phantom or instrument.
8. The proton heavy ion therapy laser positioning device according to claim 1, wherein the fixedly mounted laser lamps comprise a second laser lamp and a third laser lamp, which are mounted on the same height on both sides of the treatment couch surface, so that the cross laser lines emitted by the second laser lamp and the third laser lamp are emitted in the head-foot direction and the front-rear direction of the human body, the phantom body or the instrument.
9. The proton heavy ion therapy laser positioning device of claim 8, wherein the specific heights of the second and third laser lamps are set such that cross laser lines emitted from the second and third laser lamps propagate horizontally through an isocenter of the radiotherapy device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321598667.7U CN220175885U (en) | 2023-06-21 | 2023-06-21 | Proton heavy ion treatment laser positioning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321598667.7U CN220175885U (en) | 2023-06-21 | 2023-06-21 | Proton heavy ion treatment laser positioning device |
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| CN220175885U true CN220175885U (en) | 2023-12-15 |
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| CN202321598667.7U Active CN220175885U (en) | 2023-06-21 | 2023-06-21 | Proton heavy ion treatment laser positioning device |
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- 2023-06-21 CN CN202321598667.7U patent/CN220175885U/en active Active
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