Fig. 12
From: Feasibility of 177Lu activity quantification using a small portable CZT-based gamma-camera
Error in estimated depth (left) and relative deviation in estimated activity (right) for the cylindrical source in PMMA, with the 208-keV window excluded. The TEW method has been applied, and deviations are shown as functions of the thickness of the PMMA between the source and collimator. The deviations across all thicknesses are obtained to 22% ± 9.6% (MEGP) and 10% ± 4.5% (LEHR)