Verification method for ensuring accurate operation of intensity modulated radiation therapy

A technology for intensity-modulated radiation therapy and verification methods, which is applied in the field of verification to ensure the accuracy of intensity-modulated radiation therapy, can solve problems affecting the accuracy and accuracy of absolute dose verification and relative dose verification, and achieve the effect of improving accuracy and accuracy

Inactive Publication Date: 2015-09-09
倪昕晔
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Problems solved by technology

Verification phantoms are commonly used in solid water. It is difficult for this verification phantom to be completely consistent with the patient in terms of size, physical density, and electron density, which also affects the precision and accuracy of absolute dose verification and relative dose verification.

Method used

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  • Verification method for ensuring accurate operation of intensity modulated radiation therapy
  • Verification method for ensuring accurate operation of intensity modulated radiation therapy
  • Verification method for ensuring accurate operation of intensity modulated radiation therapy

Examples

Experimental program
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Embodiment

[0026] (1) Plan design

[0027] Fix the patient with a thermoplastic mold or a vacuum pad, and make a positioning mark, perform CT simulation positioning, and transmit the CT scan image to the treatment planning system for delineation of the target area and organs at risk, such as figure 1 Show. Set the prescribed dose in the target area and the organ-at-risk limit, and design the plan with TPS, such as figure 2 Show. After the plan is generated, the radiologist and radiotherapy physicist evaluate the plan through the dose distribution and dose volume histogram at each level.

[0028] (2) Phantom plan design

[0029] After the completion of the patient plan, because the dose measurement cannot be directly performed in the patient's body, the plan must be transplanted to a verification phantom, and the absolute dose and relative dose can be verified in the phantom.

[0030] Carry out three-dimensional reconstruction of the scanned CT image, model it through computer modeli...

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Abstract

The invention relates to a verification method for ensuring accurate operation of intensity modulated radiation therapy (IMRT). The method comprises the following steps: designing a plan, printing the model of a patient by using a 3D printing technology, scanning the model under the same positioning condition and scanning condition, transmitting the scanned model to a TPS (Therapy Planning System), calling an IMRT therapy plan to be verified, completely copying relevant therapy data of the plan to the model, placing the model on an accelerator therapy bed, adjusting the measurement points of the model to isocenter positions by means of laser rays, and performing absolute dose verification and relative dose verification. The method has the advantages: the verification model is prepared by adopting the 3D printing technology, and the model is completely consistent with the patient in size, physical density and electronic density, so that the precision and the accuracy of the absolute dose verification and the relative dose verification are improved.

Description

technical field [0001] The invention relates to a verification method for ensuring accurate execution of intensity-modulated radiation therapy. Background technique [0002] Intensity-modulated radiation therapy (IMRT) is to divide each radiation field into multiple small sub-fields under the condition that each radiation field is consistent with the shape of the target area, so that the dose intensity in the radiation field can be adjusted according to certain requirements, and the radiation intensity can be maximized. Concentrate the beam to the target area, so that the surrounding organs or tissues at risk receive less or avoid unnecessary irradiation. IMRT is realized by the movement of the MLC. The movement of the MLC in each radiation field will generate a certain number of subfields, and the shape and number of jumps of each subfield are different. There are complex relationships between them. All of these The dose distribution after sub-field synthesis is unimaginab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/00
Inventor 倪昕晔林涛高留刚
Owner 倪昕晔
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