Bragg curve detector for quick measurement in heavy-ion cancer therapy and using method thereof

Abstract

The invention relates to the field of technology of heavy-ion beam cancer therapy, in particular to a Bragg curve detector and a using method thereof. A Bragg curve detector for quick measurement in heavy-ion cancer therapy comprises an outer frame (1) and a plurality of unit ionization chambers (2), and is mainly characterized in that: water equivalent bodies (3) with different thicknesses are arranged in front of the unit ionization chambers (2); an incidence window (1-1) and an emergence window (1-5) are arranged at front and rear ends of the outer frame (1); a supporting plate (1-2) with a groove, a signal lead-out plate (1-3) and a high-voltage input plate (1-4) are arranged between the incidence window (1-1) and the emergence window (1-5); each unit ionization chamber (2) comprises a signal pole (2-1) which is connected with the signal lead-out plate (1-3) and a high-voltage plate (2-2) which is connected with the high-voltage input plate (1-4); and the unit ionization chambers (2) and the water equivalent bodies (3) in front are arranged inside the supporting plate (1-2) with the groove. The detector can realize Bragg curve measurement on incident particles in ms-order time.

Description

Technical field:

[0001] The invention relates to the field of heavy ion beam treatment of tumor technology, in particular to a Bragg curve detector and its application method. Background technique:

[0002] Heavy ion beam therapy for tumors is a new method of cancer treatment. Its use in radiation therapy has both biological advantages and dose distribution advantages Bragg peak (most of the ion energy is deposited at the end of the range), which can achieve high precision (millimeter level), high efficacy and high safety in clinical radiation therapy . In the clinical irradiation process of heavy ion cancer therapy, the tumor is divided into several slices for irradiation, and we change the irradiation depth by changing the energy of the beam to realize the irradiation of each tumor slice. Therefore, to ensure that the beam can reach the tumor accurately and safely, it is necessary to accurately measure the dose depth distribution of irradiated particles before irradiatio...

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