公开(公告)号：US09939535B2

公开(公告)日：2018-04-10

申请号：US15027765

申请日：2014-09-26

Applicant: WASEDA UNIVERSITY ,  HAMAMATSU PHOTONICS K.K.

Inventor： Jun Kataoka ,  Toru Nishiyama ,  Shinji Ohsuka ,  Michito Hirayanagi ,  Shunsuke Adachi ,  Tetsuya Uchiyama

IPC: G01T1/24 ,  G01T1/20

CPC classification number: G01T1/244 ,  G01T1/2018 ,  G01T1/2921

Abstract: A Compton camera includes a scattering detection unit, an absorption detection unit, a signal processing unit, a first shield unit, and a second shield unit. The scattering detection unit detects Compton scattering of incident radiation emitted from a radiation source. The absorption detection unit detects absorption of incident radiation that has undergone Compton scattering at the scattering detection unit. The signal processing unit obtains an image of the radiation source based on coincident detection events of Compton scattering of radiation at the scattering detection unit and absorption of radiation at the absorption detection unit. The first and second shield units are provided between the scattering detection unit and the absorption detection unit. The first shield unit selectively allows forward-scattered radiation to pass and selectively blocks back-scattered radiation.