CN113130042B - Method for dose editing in radiation treatment planning system - Google Patents
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- 230000009471 action Effects 0.000 claims abstract description 84
- 238000001959 radiotherapy Methods 0.000 claims abstract description 17
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 230000001960 triggered effect Effects 0.000 claims description 14
- 238000009826 distribution Methods 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
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- G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
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Abstract
The invention discloses a method for editing dose in a radiation treatment planning system, which comprises the following steps: when a dose editing trigger instruction is received, entering a dose editing mode; the section graph of the space dose model on the section of the current radiotherapy image moves along with the track of the control cursor, wherein the position of the control cursor is the center of the space dose model, and the track of the control cursor corresponds to the moving track of the action control device; monitoring an action event of an action control device, and adjusting the dose at the center point of the spatial dose model according to a preset control command corresponding to the action event; calculating the doses of the rest points in the space dose model by an interpolation algorithm by taking the doses of the central points of the space dose model as references; dose data for each point within the spatial dose model is saved and updated. Through the technical scheme of the invention, the user can intuitively and directly obtain the wanted dose distribution, the method is quicker and more intuitive, and the planning and design efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of medical systems, in particular to a method for editing doses in a radiotherapy planning system.
Background
At present, dose generation in the existing radiotherapy planning system is achieved through a dose optimization algorithm and a dose calculation algorithm, and the distribution of the dose is indirectly influenced through adjusting algorithm control parameters, dose volume constraint parameters or biological constraint parameters, editing flux or blade sequences and the like.
The above approach has the following disadvantages:
1. the dosage optimization and dosage calculation algorithm takes longer time;
2. too many parameters of the plan can be adjusted, and the plan adjustment strategy is ambiguous;
3. the mode of indirectly adjusting parameters to influence the dose distribution is not intuitive;
4. the planning and design process needs repeated parameter adjustment and dosage optimization, and the planning and design efficiency is low.
Disclosure of Invention
Aiming at least one of the problems, the invention provides a method for editing the dose in a radiation treatment planning system, which enables a user to intuitively and directly obtain the wanted dose distribution in a direct dose editing mode, is quicker and more intuitive than a mode of indirectly adjusting parameters to influence the dose distribution, and greatly improves the planning design efficiency.
To achieve the above object, the present invention provides a method of dose editing in a radiation treatment planning system, comprising: when a dose editing trigger instruction is received, entering a dose editing mode; the section graph of the space dose model on the section of the current radiotherapy image moves along with the track of a control cursor, wherein the position of the control cursor is the center of the space dose model, and the track of the control cursor corresponds to the moving track of the action control device; monitoring an action event of the action control device, and adjusting the dose at the center point of the spatial dose model according to a preset control command corresponding to the action event; calculating the dosages of the rest points in the space dose model by an interpolation algorithm by taking the dosages of the center points of the space dose model as references; and saving and updating the dose data of each point in the space dose model, and not modifying the dose data of the area outside the space dose model.
In the foregoing aspect, preferably, the method for dose editing in a radiation treatment planning system further includes: monitoring an action event of the action control device, performing a layering operation on the radiotherapy image where the spatial dose model is located according to a preset control command corresponding to the action event, and adjusting the size of the spatial dose model.
In the foregoing technical solution, preferably, adjusting the dose at the center point of the spatial dose model according to the preset control command corresponding to the action event specifically includes: floating displaying a dose adjustment indication label while monitoring for an action event; when the control cursor monitors that the action control device is triggered to a first action event in the dose adjustment indication label area, taking a dose value corresponding to the position of the control cursor as the dose at the center point of the spatial dose model; when the control cursor is on the indication slide block on the dose adjustment indication label, the action control device is monitored to trigger a second action event, and then a dose value corresponding to the position of the control cursor when the second action event is released is taken as the dose at the center point of the spatial dose model; and when the control cursor is in the current tangent plane graph area, if the action control device is monitored to trigger a third action event, adjusting the dose at the center point of the spatial dose model according to the action parameter of the third action event.
In the above technical solution, preferably, when the action control device is monitored to trigger a fourth action event, the size of the spatial dose model is adjusted according to an action parameter of the fourth action event.
In the above technical solution, preferably, the lower dose adjustment limit Dl and the upper dose adjustment limit Du of the spatial dose model center point are respectively:
wherein Dl is a lower limit of adjustable dose, du is an upper limit of adjustable dose, D0 is a point dose at a center point of the spatial dose model when an action event of the action control device is triggered, R is a characteristic parameter of the spatial dose model, dmax is a global maximum dose value of dose data, and n is a constant.
In the above technical solution, preferably, after calculating the Dose of each point in the spatial Dose model, the Dose is updated and stored in a database, and the front-end update display is performed in a manner of DVH (Dose-Volume Histogram), isodose line, dose cloud and/or Dose Volume Histogram statistics.
In the above technical solution, preferably, if it is monitored that the motion control device is triggered to a third motion event when the control cursor is not in the current section graphic area, the radiotherapy image is subjected to a slice-turning operation according to the motion parameter of the third motion event.
In the above technical solution, preferably, when the control cursor is in the current section graphic area, the number of motion steps of the third motion event of the motion control device in the first direction is n steps, the motion step size is (Du-D0)/n, the number of motion steps of the third motion event of the motion control device in the second direction is m steps, the motion step size is (D0-Dl)/m, where Dl is a lower limit of dose adjustment, du is an upper limit of dose adjustment, D0 is a point dose at a center point of the spatial dose model when the third motion event of the motion control device is triggered, and n and m are constants.
In the above technical solution, preferably, the action control device stores the dose adjusted by the third action event when the control cursor moves out of the section graphic area after the third action event is triggered during the period that the control cursor is in the current section graphic area.
In the above technical solution, preferably, the interpolation algorithm includes linear interpolation, bilinear interpolation, cubic interpolation, bicubic interpolation, nearest neighbor interpolation, cubic convolution interpolation algorithm, natural neighbor interpolation method, triangle net/linear interpolation method, xie Biede method, radial basis function method, multiple regression method, minimum curvature method, kriging method, and distance reciprocal multiplication method.
Compared with the prior art, the invention has the beneficial effects that: the user can intuitively and directly obtain the wanted dose distribution in a mode of directly editing the dose, the method is quicker and more intuitive than a mode of indirectly adjusting parameters to influence the dose distribution, and the planning design efficiency is greatly improved.
Drawings
FIG. 1 is a schematic block flow diagram of a method of dose editing in a radiation treatment planning system in accordance with one embodiment of the present invention;
fig. 2 is a schematic block flow diagram of a method of dose editing in a radiation treatment planning system in accordance with yet another embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1, a method for dose editing in a radiation treatment planning system according to the present invention includes: when a dose editing trigger instruction is received, entering a dose editing mode; the section graph of the space dose model on the section of the current radiotherapy image moves along with the track of the control cursor, wherein the position of the control cursor is the center of the space dose model, and the track of the control cursor corresponds to the moving track of the action control device; monitoring an action event of an action control device, and adjusting the dose at the center point of the spatial dose model according to a preset control command corresponding to the action event; calculating the doses of the rest points in the space dose model by an interpolation algorithm by taking the doses of the central points of the space dose model as references; dose data for each point within the spatial dose model is saved and updated, and dose data for areas outside the spatial dose model is not modified.
In the embodiment, the user intuitively and directly obtains the wanted dose distribution by directly editing the radiotherapy dose by using the editing tool, and the method is quicker and more intuitive than the method of indirectly adjusting parameters to influence the dose distribution, so that the planning and design efficiency is greatly improved.
In the above embodiment, preferably, the method for dose editing in a radiation treatment planning system further includes: the action event of the action control device is monitored, the layering operation can be carried out on the radiotherapy image where the space dose model is located according to a preset control command corresponding to the action event, and the size of the space dose model can be adjusted.
In the foregoing embodiment, preferably, adjusting the dose at the center point of the spatial dose model according to the preset manipulation command corresponding to the action event specifically includes: floating displaying a dose adjustment indication label while monitoring for an action event; when the control cursor monitors that the action control device is triggered to a first action event in the dose adjustment indication label area, taking a dose value corresponding to the position of the control cursor as the dose at the center point of the spatial dose model; when the control cursor is on the indication slide block on the dose adjustment indication label, the action control device is monitored to trigger a second action event, and then a dose value corresponding to the position of the control cursor when the second action event is released from clicking is taken as the dose at the center point of the spatial dose model; when the control cursor is in the current section graphic area, the action control device is monitored to be triggered to a third action event, and then the action parameter of the third action event is used for adjusting the dose at the center point of the space dose model.
In the above embodiment, preferably, the size of the spatial dose model is adjusted according to the motion parameter of the fourth motion event when the motion manipulation device is monitored to trigger the fourth motion event.
According to the method for dose editing in the radiotherapy planning system provided by the above embodiment, the spatial dose model is a sphere, a cube, a cuboid or an ellipsoid, the motion control device is a mouse or other man-machine interaction control device, if the mouse is adopted as the motion control device, the first motion event of the motion control device may be that the left mouse button is clicked, the second motion event may be that the left mouse button is clicked and kept in a clicked state for movement, the third motion event may be that the mouse wheel is scrolled, and the fourth motion event may be that the right mouse button is clicked and kept in a clicked state for movement.
As shown in fig. 2, in the following embodiments, taking a mouse as an action control device and taking a spatial dose model of a sphere as an example, a method for dose editing in a radiation treatment planning system is described in detail, where the method for dose editing in the radiation treatment planning system specifically includes:
1. when clicking a dose ball editing button and receiving a dose editing trigger instruction, entering a dose editing mode;
2. the tangent plane circle of the dose ball on the section of the current radiotherapy image moves along with the track of the control cursor, wherein the position of the control cursor is the center of the dose ball, and the track of the control cursor corresponds to the moving track of the mouse;
3. monitoring action events of a mouse, performing layer-turning operation on the radiotherapy image when a roller of the mouse rolls, and adjusting the radius of a dose ball when the right button of the mouse is clicked and keeps the click state to move;
4. when the left button of the mouse is clicked, the current position of the control cursor is used as the central point position of the dosage ball, and a dosage adjustment indication bar is displayed at the same time, wherein the position of the dosage slider is the point dosage at the current ball center;
5. the dose editing mode has the following three modes, and different mouse events complete different functions:
1) When the cursor is controlled to roll up and down in a tangent plane circle, the point dosage at the center of the sphere can be increased and decreased, the mouse wheel can roll up for n steps, the rolling step length is (Du-D0)/n, the mouse wheel can roll down for m steps, the rolling step length is (D0-Dl)/m, wherein Dl is the lower limit of dosage adjustment, du is the upper limit of dosage adjustment, D0 is the point dosage at the center point of the dosage sphere when the left button of the mouse is clicked, and n and m are constants;
2) Clicking and dragging a sliding block on the dosage adjustment indication bar by a left button of the mouse, and loosening the dosage at the center of the sphere of the mouse to adjust the dosage to the dosage value of the position of the sliding block;
3) When the left button of the mouse clicks the dose adjusting indication bar, the sliding block moves to the clicking position, and the dose at the center of the sphere is adjusted to be the dose value of the position of the sliding block;
6. readjustment of dose distribution within the dose sphere: after the dosage of the sphere center of the dosage sphere is edited and determined, the dosages of all points in the space in the dosage sphere are obtained by interpolation algorithm through dosage at the edge of the dosage sphere and the position of the sphere center;
7. after the position of the dosage ball is determined, the radius of the dosage ball can be displayed and adjusted by pressing the right button of the mouse;
8. when the cursor is controlled to move out of the tangent plane circle, the function of turning over the image can be realized by rolling the mouse wheel;
9. dose preservation and update: automatically storing the edited dose into a database after adjusting the dose distribution in the ball;
10. the front-end updates display dose data including dose volume histogram, isodose line, DVH statistics, etc.
In the above embodiment, it is preferable that after the position of the center point of the dose ball is determined, the radius of the dose ball can be adjusted as well when the right button of the mouse is clicked and the click state is kept moving.
In this embodiment, in addition to editing the dose in a straightforward, intuitive manner, the dose in certain volumes of interest may be modified by adjusting the integral DVH curve or adjusting the differential DVH curve; modifying the dose distribution by editing the isodose line; modifying the dose distribution by means of a pen brush of the dose cloud and the like; the dose is edited by modifying the dose distribution in a three-dimensional view of the dose.
In the above embodiment, it is preferable that the dose adjustment lower limit Dl and the upper limit Du of the dose sphere center point are respectively:
where Dl is the lower limit of dose adjustability, du is the upper limit of dose adjustability, D0 is the point dose at the center point of the dose sphere when the mouse is clicked on the left button, unit cGy, R is the radius of the dose sphere, dmax is the global maximum dose value of the dose data, and n is a constant.
In the above embodiment, it is preferable that the dose of the dose sphere center point and other points in the spatial model dose model is calculated, updated and stored in the database, and the front-end update display is performed in the form of DVH, isodose line, and/or dose volume histogram statistical data.
In the above embodiment, preferably, when the mouse wheel is scrolled while the control cursor is not in the current section graphic region, the radiotherapy image is subjected to a layering operation.
In the above embodiment, preferably, after the mouse is scrolled while the control cursor is within the current section graphic region, the dose adjusted by the mouse scroll process is saved when the control cursor is moved out of the section graphic region.
In the above-described embodiment, preferably, the interpolation algorithm includes linear interpolation, bilinear interpolation, cubic interpolation, bicubic interpolation, nearest neighbor interpolation, cubic convolution interpolation algorithm, natural neighbor interpolation, triangulated/linear interpolation, xie Biede method, radial basis function method, multiple regression method, minimum curvature method, kriging method, and distance reciprocal multiplication method.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method of dose editing in a radiation treatment planning system, comprising:
when a dose editing trigger instruction is received, entering a dose editing mode;
the section graph of the space dose model on the section of the current radiotherapy image moves along with the track of a control cursor, wherein the position of the control cursor is the center of the space dose model, and the track of the control cursor corresponds to the moving track of the action control device;
monitoring an action event of the action control device, and adjusting the dose at the center point of the spatial dose model according to a preset control command corresponding to the action event, wherein the method specifically comprises the following steps:
floating displaying a dose adjustment indication label while monitoring for an action event;
when the control cursor monitors that the action control device is triggered to a first action event in the dose adjustment indication label area, taking a dose value corresponding to the position of the control cursor as the dose at the center point of the spatial dose model;
when the control cursor is on the indication slide block on the dose adjustment indication label, the action control device is monitored to trigger a second action event, and then a dose value corresponding to the position of the control cursor when the second action event is released is taken as the dose at the center point of the spatial dose model;
when the control cursor is in the current section graphic area, if the action control device is monitored to be triggered to a third action event, adjusting the dose at the center point of the spatial dose model according to the action parameter of the third action event;
calculating the dosages of the rest points in the space dose model by an interpolation algorithm by taking the dosages of the center points of the space dose model as references;
and saving and updating the dose data of each point in the space dose model, and not modifying the dose data of the area outside the space dose model.
2. A method of dose editing in a radiation treatment planning system according to claim 1, further comprising: monitoring an action event of the action control device, performing a layering operation on the radiotherapy image where the spatial dose model is located according to a preset control command corresponding to the action event, and adjusting the size of the spatial dose model.
3. A method of dose editing in a radiation therapy planning system according to claim 2, wherein upon hearing that the motion manipulation device is triggered by a fourth motion event, the size of the spatial dose model is adjusted according to a motion parameter of the fourth motion event.
4. A method of dose editing in a radiation treatment planning system according to claim 1, wherein the lower and upper dose adjustment limits Dl and Du, respectively, for the spatial dose model center point are:
wherein Dl is a lower limit of adjustable dose, du is an upper limit of adjustable dose, D0 is a point dose at a center point of the spatial dose model when an action event of the action control device is triggered, R is a characteristic parameter of the spatial dose model, dmax is a global maximum dose value of dose data, and n is a constant.
5. A method of dose editing in a radiation treatment planning system according to claim 1 wherein the dose for each point in the spatial dose model is calculated, updated and saved to a database and displayed as a front-end update in the form of DVH, isodose line, dose cloud and/or dose volume histogram statistics.
6. A method of dose editing in a radiation treatment planning system according to claim 1 wherein if it is monitored that the motion control device is triggered by a third motion event when the control cursor is not within the current slice region, a layering operation is performed on the radiation treatment image with motion parameters of the third motion event.
7. A method of dose editing in a radiation therapy planning system according to claim 1, wherein the number of steps of action of the third action event of the action control device in the first direction is n steps, the step size of action is (Du-D0)/n, the step size of action of the third action event of the action control device in the second direction is m steps, the step size of action is (D0-Dl)/m, where Dl is a lower limit of dose adjustment, du is an upper limit of dose adjustment, D0 is a point dose at the spatial dose model center point when the third action event of the action control device is triggered, and n, m are constants.
8. A method of dose editing in a radiation treatment planning system according to claim 6 wherein the action control device saves the dose adjusted by the third action event when the control cursor is moved out of the current facet graphical region after the third action event is triggered during the time that the control cursor is within the third action event.
9. The method of dose editing in a radiation treatment planning system of claim 1, wherein the interpolation algorithm comprises linear interpolation, bilinear interpolation, cubic interpolation, bicubic interpolation, nearest neighbor interpolation, cubic convolution interpolation algorithm, natural neighbor interpolation, triangulated/linear interpolation, xie Biede, radial basis function, multiple regression, minimum curvature, kriging, and inverse distance multiplication.
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| CN201911421531.7A CN113130042B (en) | 2019-12-31 | 2019-12-31 | Method for dose editing in radiation treatment planning system |
| PCT/CN2020/091843 WO2021036366A1 (en) | 2019-08-29 | 2020-05-22 | Standardized artificial intelligence automatic radiotherapy planning method and system |
| US16/977,095 US11964170B2 (en) | 2019-08-29 | 2020-05-22 | Standardized artificial intelligence automatic radiation therapy planning method and system |
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