Intrinsic uniformity and relative sensitivity quality control tests for single-head gamma cameras.

Autor:	Elkamhawy AA; Nuclear Medicine Department, Cuero Community Hospital, Texas 77954, USA. abdel@dewittec.net, Rothenbach JR, Damaraju S, Badruddin SM
Jazyk:	angličtina
Zdroj:	Journal of nuclear medicine technology [J Nucl Med Technol] 2000 Dec; Vol. 28 (4), pp. 252-6.
Abstrakt:	Objective: We sought to determine the best parameters for rapid performance of daily quality control testing of intrinsic uniformity and relative sensitivity for the single-head gamma-camera system in our nuclear medicine department. Methods: The effects of the following parameters on intrinsic uniformity were studied: gamma source activity, number of acquired counts for the flood image, source-to-camera distance, image matrix size, and source volume. The dead time of the system was determined experimentally using the two-source method for accurate calculation of relative sensitivity. Results: A set of parameters for rapid performance of daily gamma-camera intrinsic uniformity and relative sensitivity was determined. The dead time of our gamma-camera system was found to be 4.5 +/- 0.2 micros. Conclusion: With our recommended parameters, the intrinsic uniformity and relative sensitivity quality control testing can be performed in 5-6 min. The dead time of each gamma-camera system must be determined experimentally in each nuclear medicine department.
Databáze:	MEDLINE
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