A device for measuring beam dose distribution

A technology for measuring equipment and dose distribution, applied in the field of dose verification equipment, to achieve the effects of reducing dose verification time, improving verification accuracy, and reducing verification costs

Active Publication Date: 2019-06-28
JIANGSU SUPERSENSE TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a beam dose distribution measurement device, which can solve the problem of online dose monitoring verification

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  • A device for measuring beam dose distribution

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Embodiment Construction

[0023] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0024] The device of the present invention belongs to on-line detection, but its principle is different from that of traditional PET. After protons / heavy ions are incident on the human body, when the human body deposits doses, due to the reaction with the atoms in the human body, on the one hand, positron decay nuclides will be generated. ( 11 C, 15 O, 13 N, etc.), on the other hand, it will produce prompt high-energy gamma photons. Of course, in addition to the above two, there are also low-energy X-rays and gamma photons. In terms of time, among the three particles, only the delayed high-energy gamma photons are the closest to the proton / heavy ion pulse time, with almost no delay. X-rays and low-energy gamma rays have a certain delay, but the intensity is the strongest; while positrons have the largest delay and the weakest intensity. The decay o...

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Abstract

The invention discloses a beam dose distribution measurement device, which comprises a first-layer detector, a second-layer detector, a third-layer detector, a collimator and a signal processing module, wherein the first-layer detector, the second-layer detector and the third-layer detector are arranged in an overlapped mode sequentially; the collimator is arranged above the first-layer detector; and the first-layer detector, the second-layer detector, the third-layer detector and the collimator are all electrically connected with the signal processing module. the beam dose distribution measurement device disclosed by the invention has the advantages that the dose verification time can be reduced; the space distribution verification precision can be improved; arrangement of huge and expensive online PET is avoided; a postoperative PET scanning procedure is removed; the dose space distribution verification precision can reach 1 mm; the preoperative verification time is compressed to 15 m; the online monitoring time is completely synchronous with the treatment; no extra verification time is needed; and the verification time can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of dose verification equipment, in particular to a beam dose distribution measurement equipment used in proton / heavy ion therapy. Background technique [0002] The principle of preoperative dose verification is to use a phantom instead of a patient, use a designed treatment plan for irradiation on the proton / heavy ion terminal, actually measure the spatial distribution of the dose of the proton beam / heavy ion beam in the phantom, and compare with the expected Compare the spatial distribution of the accelerator to verify whether there is any deviation, so as to ensure that the accelerator is working in a normal state. [0003] Positron emission tomography (PET) is the basic technical route for intraoperative and postoperative dose verification of proton / heavy ion therapy for cancer. The principle of this technical route is as follows: protons / heavy ions will react with atomic nuclei in the human body to gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/20G01T1/29
CPCG01T1/20G01T1/2985
Inventor 李磊许纹健孙熙杉薛会吕凌俊王敏刘飞
Owner JIANGSU SUPERSENSE TECH CO LTD
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