Assessment of Quality Control of Gamma Camera in El-Nelein Medical Center

Abstract

This study was preformed to estimate the performance of gamma camera (quality control) system in EL-NILEEN Medical Diagnostic Center in Khartoum (NMDC),department of nuclear medicine, single photon emission computed tomography system (SPECT). to check the performance of gamma camera ,to ensure if the system still working by the same rate of performance by checking the COR and uniformity of gamma camera and System sensitivity .using quality control tests with enhancement of gamma camera system Orbiter 37 gamma camera single head [37PMTs /FOV 387 mm], generator and dose calibrator, has been carried out by reading includes 54 (readings), uniformity 46 readings, sensitivity 6 reading and COR 2 readings and the data was collected from quality control procedure.

The study shows that: from 140 KeV The sensitivity of the camera ranged from 79.9 to 92.1cps/MBq and the acceptable limits is designed according to the conditions of the test.So the sensitivity of the camera remain within NEMA levels, the COR is within the acceptable limit (+ or – 2%) and the uniformity At 15% Tc-99m window the Integral uniformity and Differential uniformity were as following , respectively the integraland differentials uniformity Before correction 3.09, 1.72%After correction 2.3% , 1.84% which at the acceptable limits before and after the correction.