Automatic optimization method for on-line self-adaption radiotherapy plan and device
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An automatic optimization and self-adaptive technology, applied in radiation therapy, treatment, etc., can solve problems such as inability to be widely used, long calculation time, and long time consuming.
Active Publication Date: 2015-02-11
BEIJING LINKING MEDICAL TECH CO LTD
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Problems solved by technology
At present, online adaptive radiotherapy cannot be widely used in actual clinical treatment, and there are mainly the following problems and shortcomings:
[0004] 1. The online adaptive radiotherapy method is based on a general commercial planning system. When generating a new treatment plan, it needs to calculate and solve large-scale dose calculation and optimization problems. The calculation time is very long and cannot be completed within a clinically acceptable time
[0005] 2. This method r
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Embodiment 1
[0081] Embodiment 1: The online adaptive radiotherapy plan automatic optimization method provided in this embodiment 1, such as figure 1 shown, including the following steps:
[0082] Step 1), read the original information including field information, dose information and clinical information in the original radiotherapy plan;
[0083] Wherein, the original radiotherapy plan is a static intensity-modulated radiotherapy plan (Static IMRT) or an arc-shaped intensity-modulated radiotherapy plan (Arc IMRT);
[0084] The field information of the original radiotherapy plan includes: gantry angle, multi-page collimator sequence for each subfield, and number of machine jumps;
[0085] The dose information of the original radiotherapy plan includes: dose distribution and dose volume histogram;
[0086] The clinical information of the original radiotherapy plan includes: the patient's original delineated target volume and the outline of the original organ at risk;
[0087] Step 2), obt...
Embodiment 2
[0135] Embodiment 2: The online self-adaptive radiotherapy plan automatic optimization method provided by Embodiment 2 is basically the same as the method provided by Embodiment 1, and the similarities will not be described again. The difference is:
[0136] The new radiotherapy plan obtained in the step 9) also includes the following steps in the transmission process:
[0137] Step 10), radiotherapy plan parameter transmission process check: When the new radiotherapy plan is transmitted to the dose execution verification system (Record and Verify System, R&V), read the verification system including multi-page collimator blade position, machine jump number , gantry angle and other treatment parameters are compared with the parameters in the new radiotherapy plan to determine whether the treatment parameters in the verification system are consistent with the parameters in the new radiotherapy plan, if not, check whether the record verification system (R&V) is abnormal , if yes,...
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Abstract
The invention discloses an automatic optimization method for an on-line self-adaption radiotherapy plan and a device. The method comprises the following steps: by reading an original radiotherapy plan and the information, such as acquired present gradation guide image and sketching target section, calculating a beam direction view of each frame angle, thereby acquiring the optimized newly generated sub-view and corresponding dose distribution, machine hop count and the like; finishing the on-line self-adaption automatic optimization of the radiotherapy plan; and meanwhile, performing secondary check on the dose distribution of the automatic radiotherapy plan through the calculation and assessment for a three-dimensional gamma index value; if failing to pass, performing normalization operation and updating the machine hop count of the new sub-view, thereby finishing the quality ensuring work. Furthermore, through the radiotherapy plan parameter transmission process check, the possibly present problem in a parameter transmitting and writing executing system is effectively avoided, and the safety monitoring is performed through real-time dosage detection during a plan executing process. The on-line self-adaption optimization of the radiotherapy plan, the quality ensuring and the full automation of parameter transmission check and real-time dosage detection are realized.
Description
technical field [0001] The invention relates to an optimization method and device for radiotherapy plan, in particular to an automatic optimization method and device for radiotherapy plan. Background technique [0002] At present, the process of tumor radiation therapy (Radiation Therapy) is to first generate a treatment plan based on the patient's positioning CT before treatment, and then keep the treatment plan unchanged during the subsequent treatment process, and implement several fractional treatments for the patient. . This treatment mode does not take into account the changes in the patient's anatomy during treatment. When the patient's anatomy changes greatly, Offline Adaptive Radiation Therapy (Offline ART) is usually used to modify the treatment plan. However, the offline adaptive radiotherapy method currently uses the traditional commercial treatment planning system, which is inefficient, time-consuming and labor-intensive, so it is rarely adopted by hospitals. ...
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