Production of three-dimensional physical compensator using section cutting method to realize physical compensation radiotherapy

An intensity modulator and three-dimensional technology, which is applied in the direction of X-ray/γ-ray/particle irradiation therapy, can solve the problems of large blade field radius, high price, and acceptance by small and medium hospitals, and achieve low irradiation time, easy operation, and positioning accurate effect

Inactive Publication Date: 2004-06-16
陈超敏 +2
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Problems solved by technology

The disadvantage is that the treatment time is long, and the negative influence of organ movement must be overcome; at the same time, due to the error of the stepping movement of the bed, the adjacent areas of the thin layer may be over- or under-dose irradiated
Moreover, the collimator has high processing precision and is expensive (about 300,000 US dollars), and the leakage between the blades cannot be ignored, and the radiation field radius of the blades is large
The latter adopts narrow-beam scanning (Scanning Beam) technology, uses computer to control the size of electromagnetic scanning current, generates electrons or X-rays with different directions and sizes, and forms the required dose intensity distribution. It has high radiation utilization rate and short treatment time. advantages, but it is expensive (about 8 million US dollars), so far only about ten radiotherapy centers in the world have

Method used

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  • Production of three-dimensional physical compensator using section cutting method to realize physical compensation radiotherapy
  • Production of three-dimensional physical compensator using section cutting method to realize physical compensation radiotherapy

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Embodiment Construction

[0020] It can be seen from the flowchart in Fig. 1 that the main innovation of the present invention is to convert the model of the three-dimensional dose distribution of target area irradiation obtained by the treatment planning system into a model that can be made by an easier and more convenient method through the "slicing method". Several plane models of the model, and then use the superposition method to obtain a three-dimensional model of molten lead or a three-dimensional block made of lead plate. This achieves a three-dimensional dose distribution which was previously difficult to obtain.

[0021] The present invention will be described in further detail below.

[0022] 1. Determination of the three-dimensional dose model: The key to realizing intensity-modulated radiation therapy (IMRT) lies in the determination of the three-dimensional irradiation dose of the target area, which is an important part of the IMRT treatment plan. Designing a reasonable and applicable th...

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Abstract

The invention relates to a process for making three-dimensional physical compensation apparatus belonging to the field of radiation therapy, and suitable for the intensity modulation technique of X-ray (linear accelerator), gamma-ray and electronic rays. By applying a cross sectioning technique, the invention realizes the transformation from complex three-dimensional dosage model into a plurality of 2-D plane models that can be made, then the multiple two-dimensional models are superposed. The system can be applied to various linear accelerators with easiness in operation.

Description

technical field [0001] The invention relates to a manufacturing method of a three-dimensional intensity modulator (also known as a three-dimensional lead melting block, a three-dimensional physical compensator), which is suitable for intensity-modulated radiation of X-rays (linear accelerators), gamma rays and electron rays in the field of radiotherapy Intensity modulation techniques of radiation in therapy. Background technique [0002] IMRT-Intensity Modulation Radiotherapy (IMRT-Intensity Modulation Radiotherapy) is an advanced external three-dimensional radiation technology newly developed on the basis of conformal radiation therapy (3D CRT-three Dimension Conformal Radiotherapy). The shape is consistent with the shape of the tumor in the three-dimensional direction, and the output dose rate of each point within the irradiation field can be adjusted according to the requirements, and the weight of each beam in the irradiation field can be optimized, so that the tumor dos...

Claims

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Application Information

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IPC IPC(8): A61N5/10
Inventor 陈超敏周凌宏吕庆文
Owner 陈超敏
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