Fig. 5.

Clear separation of ^99mTc and ¹²³I energy peaks on DNM as contrasted with S-SPECT. In addition, the S-SPECT spectra show two fluorescence peaks for Pb at 75 and 85 keV originating at the parallel-hole collimator. Septal penetration and scatter of higher energy photons associated with the ¹²³I dose are also noted on S-SPECT alone