APPARATUS FOR PARTICLE THERAPY VERIFICATION COMPRISING A COLLIMATOR WITH MULTIPLE OPENINGS

摘要

The disclosure is related to an apparatus and method for charged hadron therapy verification. The apparatus comprises a collimator comprising a plurality of collimator slabs of a given thickness, spaced apart so as to form an array of mutually slit-shaped openings, configured to be placed at a right angle to the beam line, so as to allow the passage of prompt gammas from the target, the collimator being defined at least by three geometrical parameters being the width and depth of the slit-shaped openings and a fill factor. The disclosure is also related to a method for charged hadron therapy verification with a multi-slit camera.

主权项

1. An apparatus for charged hadron therapy verification by detecting prompt gammas produced when irradiating a target with a charged hadron beam, the beam being directed along a beam line, said apparatus comprising:
a collimator comprising a plurality of collimator slabs of thickness t, spaced apart so as to form an array of slit-shaped openings, configured to be placed at a right angle to the beam line, so as to allow the passage of prompt gamma emission from the target, the collimator being defined at least by three geometrical parameters being: the width (s) and depth (D) of the slit-shaped openings and the fill factor (f), with f equal to t/(t+s), a detection device suitable for detecting said prompt gamma emission, comprising at least a portion of scintillator material aligned with each of said slit-shaped openings,characterized in that the width s of the openings, the depth D of the openings and the fill factor f are chosen such that:
s is 3 mm or higher D is between 50 mm and 200 mm f is lower than 0.5.