公开(公告)号：US20190083816A1

公开(公告)日：2019-03-21

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

CPC classification number: A61N5/1075 ,  A61N5/1045 ,  A61N5/1071 ,  A61N5/1081 ,  A61N2005/1087 ,  G01T1/2935

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.

公开(公告)号：US20170003403A1

公开(公告)日：2017-01-05

申请号：US15100006

申请日：2014-11-30

Applicant: ION BEAM APPLICATIONS S.A.

Inventor： David MENICHELLI ,  Friedrich FRIEDL

IPC: G01T1/29 ,  A61N5/10 ,  H01J47/02

CPC classification number: G01T1/2935 ,  A61N5/1075 ,  A61N2005/1087 ,  H01J47/02

Abstract: The present invention relates to a dosimetry device (10) for determining a spatial distribution of a quantity of radiation incident on the dosimetry device. The device comprises a segmented electrode assembly (12) comprising an electrically non-conducting substrate (13) having a plurality of electrode elements (14) provided thereon, surrounded by ground electrodes. The device further comprises an electrically conducting sheet (16) comprising a protrusion (17) arranged such as to define a plurality of ionization chamber cavities (18) between the segmented electrode assembly (12) and the electrically conducting sheet (16). The device also comprises a voltage applying means (28) for applying a voltage difference between the electrically conducting sheet (16) and the plurality of electrode elements (14) and a routing means (25) for routing a plurality of ionization currents corresponding to the plurality of electrode elements (14) to a processing means.

Abstract translation: 本发明涉及一种用于确定入射在剂量测定装置上的辐射量的空间分布的剂量测定装置（10）。 该装置包括分段电极组件（12），其包括具有设置在其上的由接地电极包围的多个电极元件（14）的非导电衬底（13）。 该装置还包括导电片（16），其包括突出部（17），所述突起（17）布置成在分割的电极组件（12）和导电片（16）之间限定多个电离室空腔（18）。 该装置还包括用于在导电片（16）和多个电极元件（14）之间施加电压差的电压施加装置（28）和用于布置对应于多个电极元件（14）的多个电离电流的布线装置（25） 多个电极元件（14）连接到处理装置。