Fig. 8
Top: experimental and simulated projection images for the NEMA phantom of \(^{99\text {m}}\)Tc for projection slice 38 is shown. The images have been cropped to 100\(\times\)100 pixels. Bottom: the vertically averaged counts along a rectangular profile (shown in white on the inset) of the simulated and experimental image. The percentage residuals are shown with the \(\pm 3\upsigma\) uncertainty of the sensitivity ratio shown as dashed lines