Simple method to measure gamma camera energy resolution Nasser Ballani, Geoff Dougherty  Radiography  Volume 21, Issue 2, Pages 172-175 (May 2015) DOI: 10.1016/j.radi.2014.10.007 Copyright © 2014 The College of Radiographers Terms and Conditions

Figure 1 Average counts acquired at one detector versus energy window (black), and fitted to a Gaussian (red). (For 99Tcm point source). Radiography 2015 21, 172-175DOI: (10.1016/j.radi.2014.10.007) Copyright © 2014 The College of Radiographers Terms and Conditions

Figure 2 Gaussian fitting of the counts acquired at the two detectors (detector #1 in black; detector #2 in red) of a dual-head imaging system versus energy window. (For 99Tcm point source). Radiography 2015 21, 172-175DOI: (10.1016/j.radi.2014.10.007) Copyright © 2014 The College of Radiographers Terms and Conditions

Figure 3 Counts acquired at one detector versus energy window (black), and fitted to a Gaussian (red). (For 131I point source). Radiography 2015 21, 172-175DOI: (10.1016/j.radi.2014.10.007) Copyright © 2014 The College of Radiographers Terms and Conditions