학술논문
MicroPET performance in the presence of the third gamma
Document Type
Conference
Author
Source
2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515) Nuclear science symposium Nuclear Science Symposium Conference Record, 2003 IEEE. 3:1797-1799 Vol.3 2003
Subject
Language
ISSN
1082-3654
Abstract
Isotopes in routine use for positron emission tomography (PET) produce only a single pair of 511 keV annihilation photons. "Dirty" positron emitters, e.g. /sup 124/I, that emit additional gammas are increasingly of interest. Performance of the Concorde microPET P4 small animal scanner was experimentally studied. Three phantoms were used to compare the pure positron emitter /sup 18/F to /sup 124/I and the convenient proxies /sup 70/As and /sup 72/As. While the third gamma had only a small impact on images of a contrast/detail phantom, resolution of hot sources on cold background was noticably reduced in a "Derenzo" phantom. A "NEMA" phantom exhibited a 15% background due to the third gamma.