公开(公告)号：US20210311212A1

公开(公告)日：2021-10-07

申请号：US17262066

申请日：2019-07-22

Applicant: Ion Beam Applications S.A.

Inventor： David Menichelli ,  Timo Hausbeck ,  Lutz Müller

IPC: G01T1/29 ,  G01T1/203

Abstract: The present disclosure relates to scintillating detector systems for radiation therapy beams. In one implementation, a detector system for evaluating radiation delivered by a radiation beam output from a beam generator may include a phantom enclosing an internal volume and having an outer surface, extending around the internal volume, for exposure to radiation, and an inner surface coated, at least in part, with a scintillating material and facing the internal volume. The system may further include a camera external to the enclosed volume and configured to view at least a portion of the inner surface, through an opening of the hollow phantom, when radiated by the radiation beam. The system may further include at least one processor configured to receive images from the camera and calculate, based on the received images, a spatial dose distribution produced by the radiation delivered by the radiation beam to the hollow phantom.

公开(公告)号：US10702717B2

公开(公告)日：2020-07-07

申请号：US16136374

申请日：2018-09-20

Applicant: Ion Beam Applications S.A.

Inventor： David Menichelli ,  Lutz Müller ,  Jochen Krimmer

IPC: A61N5/10 ,  G01T1/29

Abstract: A sensing device for a radiation therapy apparatus, the apparatus comprising an accelerator and a beam-shaping device the beam shaping device being a multi-leaf collimator (MLC) (2) having a plurality of pairs of leaves, and a rotatable gantry, the sensing device comprising: a transmission electronic detector (1) comprising an array of ionization chambers. The ionization chambers are defined by a bias electrode (11a,11b, 34,42) on the one hand and by a planar array of conductive strips (40) or strip assemblies (30) on the other hand. The strips or strip assemblies are associated to the leaf pairs of the MLC. The strips are the collecting electrodes of the ionization chambers. Each strip assembly or in the case of one particular embodiment, each strip, yields two currents which allow to determine the position of the leaves of a leaf pair associated with the strip or strip assembly, a gantry sensor configured to determine at least one position associated with a gantry angle; and a processor, adapted to determine the position of at least one pair of leaves of the MLC using the currents i1 and i2 obtained from the collecting electrode strips.