Fig. 6

Comparison of measured and simulated data for \(^{177}{\mathrm {Lu}}\) with the LEHR and MEGP collimators. Top row: energy spectra. For the simulations, a total spectrum is shown along with the individual contributions of the 55 keV, 113 keV and 208 keV photon emissions of \(^{177}{\mathrm {Lu}}\). Middle row: corresponding images of the phantom for the 113 keV energy window. Red lines indicate columns and rows used to extract profiles. Bottom row: Profiles of measured and simulated images, where the simulated images have been scaled to the same total number of counts as the measured images