Gamma-camera linearity and resolution assessed using coarsely sampled line spread functions

Autor:	C J Gibson
Rok vydání:	1992
Předmět:	Optics Quality (physics) Radiological and Ultrasound Technology law business.industry Computer science Resolution (electron density) Linearity Radiology Nuclear Medicine and imaging Line spread business Gamma camera law.invention
Zdroj:	Physics in Medicine and Biology. 37:371-377
ISSN:	1361-6560 0031-9155
DOI:	10.1088/0031-9155/37/2/005
Popis:	The measurement of gamma-camera linearity and resolution forms an important part of acceptance testing and routine quality control. Conventional techniques for measuring locations and widths of line spread functions require high precision digitization, usually via external analogue to digital converters. A technique is described for accurate measurement of peak location and width using coarsely sampled line spread functions. Results obtained for both simulated and actual gamma-camera data demonstrate that the method is capable of measuring peak deviations as small as 0.2 mm when the sampling interval is 1.5 mm or more. The precision of the method was found to be at least as good as conventional techniques. It is suggested that using the method accurate measurements of linearity can be made from a conventional 256*256 nuclear medicine image of a slit mask, and this enables routine evaluation of an important parameter of camera performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56a5ab675c256781bdfb93024be501c9 https://doi.org/10.1088/0031-9155/37/2/005 Zobrazit plný text záznamu