Basic Evaluation of OSEM Algorithm by Assessing Iteration Times and Number of Subsets in a Hot Spot Phantom Study

Autor:	Shigenori Maru, Masamichi Yanagisawa
Rok vydání:	2001
Předmět:	Computer science Physical phenomena Streak Hot spot (veterinary medicine) General Medicine Algorithm Imaging phantom
Zdroj:	Japanese Journal of Radiological Technology. 57:1233-1239
ISSN:	1881-4883 0369-4305
DOI:	10.6009/jjrt.kj00003110968
Popis:	12) is devel‑ oping with advancement of SPECT devices and improve‑ ment of computer performance. Various advantages of the OSEM method that have been reported include the followings: The signal‑to‑noise ratio (S/N) in low count regions is improved no negative value is present in re‑ constructed values streak artifacts are reduced and scatter attenuation and resolution correction can be performed by implementing physical phenomena in prob‑ ability calculations in advance. 3‑7) These days clinical cases applying the characteristics such us reduced streak artifacts or improved S/N in low count regions have been reported in myocardial SPECT and tumor SPECT. 8‑10)
Databáze:	OpenAIRE
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