公开(公告)号：US20170123078A1

公开(公告)日：2017-05-04

申请号：US15333350

申请日：2016-10-25

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Ryosuke OTA ,  Ryoko YAMADA ,  Tomohide OMURA ,  Mitsuo WATANABE

IPC: G01T1/20 ,  G01T1/29

CPC classification number: G01T1/2006 ,  G01T1/2985

Abstract: A scintillator array including a plurality of scintillators, an optical detector array corresponding to the scintillators, an AD conversion unit configured to convert an analog signal output from each optical detector into digital data, and a position detection processing unit configured to specify a position of the scintillator on which the radiation is incident are provided. If there are two different pieces of digital data at the same time, the position detection processing unit determines that radiation is incident on two scintillators when energy value data of the two pieces of digital data is greater than an energy value of a Compton edge and specifies the address of the scintillator on which the radiation is incident by comparing the energy values of the two pieces of digital data when at least one of the two energy values is less than the energy value of the Compton edge.

公开(公告)号：US20190353808A1

公开(公告)日：2019-11-21

申请号：US16407455

申请日：2019-05-09

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuo WATANABE ,  Takahiro MORIYA ,  Tomohide OMURA

IPC: G01T1/29

Abstract: A PET device includes detectors including detector signal processing units and a data processing circuit configured to acquire a gamma ray generation position. The detector signal processing unit includes a Compton cone estimating unit configured to estimate incidence directions of gamma rays detected by a pair of detectors as a first and second Compton cones. The data processing unit includes: a coincidence acquiring unit; a scattering surface estimating unit; an intersection line determining unit; an intersection point determining unit; and a gamma ray generation position.