公开(公告)号：US20200326438A1

公开(公告)日：2020-10-15

申请号：US16090655

申请日：2017-04-04

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Ryosuke OTA ,  Ryoko YAMADA ,  Takahiro MORIYA

IPC: G01T1/29

Abstract: A radiation position detector includes a radiator including a medium that generates Cherenkov light by interacting with an incident radiation, a photodetector including a plurality of two-dimensionally arrayed pixels, the plurality of pixels being disposed to correspond to a predetermined surface of the radiator, and a control unit that acquires position information and time information of the plurality of pixels which have detected the Cherenkov light on the basis of a signal output from the photodetector, and obtains a position of a generation place of the Cherenkov light in the radiator on the basis of the acquired position information and the acquired time information, and a propagation locus of the Cherenkov light in the radiator.

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.