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Real-time monitoring method for particle radiotherapy beam

A radiation therapy and real-time monitoring technology, applied in X-ray/γ-ray/particle irradiation therapy, etc., can solve the problems of not being able to fully ensure the accuracy of beam output, unable to monitor the size and uniformity of beam information in real time, etc.

Active Publication Date: 2019-06-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, this type of quality assurance method still cannot fully ensure the accuracy of the beam output during the treatment process, and cannot perform real-time monitoring of the beam information (energy, irradiation position, size, uniformity, half-height width) irradiated on the patient's body surface

Method used

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  • Real-time monitoring method for particle radiotherapy beam
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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] figure 1 Schematic diagram of Cerenkov light generated and detected by the proton beam at the irradiation position on the patient's body surface. The patient 3 is fixed on the treatment couch 7, and the proton beam 2 emitted from the proton accelerator device 1 irradiates the patient 3 according to the treatment plan. The proton beam 2 generates Cerenkov light 4 in the body of the patient 3, and the Cerenkov light 4 generated near the body surface within the irradiation field passes through the body surface and is detected by the EMCCD detector 5 fixed on the suspension arm 6, Then deduct the ambient light background data and stray radiation background data, and then obtain the two-dimensional distribution of Cerenkov light intensity according to the proportional relationship between the Cerenkov light intensity and the total light intensity, according to the Cerenk...

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Abstract

The invention discloses a real-time monitoring method for a particle radiotherapy beam. The monitoring method comprises the following steps: the irradiation position, size, shape, uniformity and half-height width of a proton beam can be monitored in real time according to two-dimensional distribution of Cherenkov light intensity; actual output energy of the proton beam can be determined on the basis of the quantitative relationship between Cherenkov light intensity and the energy of the proton beam; the dose deviation value can be calculated according to the real-time deviation information ofbeam output. The novel method is simple, practical, stable and reliable and capable of comprehensively monitoring beam information (including energy, irradiation position, size, uniformity and half-height width) in the proton radiotherapy process in real time, and accurate supply of the planned dose can be effectively ensured.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to a method for real-time monitoring of particle radiotherapy beams. Background technique [0002] Proton radiation therapy is one of the most cutting-edge cancer treatment methods at present, and it has unique physical characteristics: there is a peak in the dose deposition of protons at a certain depth, and after the peak, the dose deposition drops very steeply, almost instantly reducing to 0; In practical applications, a high-dose platform can be formed only in the tumor area through the combination of proton beams with different energies. Compared with traditional photon radiation therapy, proton radiation therapy can reduce the dose to normal tissues and organs in the tail as much as possible while ensuring the dose to the target area. But at the same time, it is precisely because of this characteristic of the proton beam that a slight inaccuracy in the output of the proton beam ca...

Claims

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Application Information

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IPC IPC(8): A61N5/10
Inventor 耿长冉舒迪昀汤晓斌
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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