The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2004
Filed:
May. 10, 2002
Hiroshi Uchida, Hamamatsu, JP;
Takaji Yamashita, Hamamatsu, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
A first detector group and a second detector group , disposed opposite to each other and detecting gamma ray pairs resulting from electron-positron pair annihilation, are each constituted by two two-dimensional radiation detectors , and , and , and arranged so that a prescribed arrangement spacing L is established between the scintillator arrays and . Furthermore, the coincidence counting circuit of the signal processing circuit is constituted so as to carry out coincidence counting for diagonally disposed detectors as well as oppositely disposed detectors. Accordingly, the are a between the ranges of the fields of view resulting from opposite detectors is supplemented by a range of the field of view resulting from diagonally disposed detectors. Consequently, it becomes possible to attain a positron imaging device wherein the range of the field of view is efficiently expanded, and the simplification and cost reduction of the device are realized.