A liver-spleen study SPECT and 3D SPECT. (a) Transverse slices, prefiltered only by Ramp filter could emerge a small piece of the ruptured spleen. (b) 3D SPECT reconstruction by ramp-Hanning filters (Hanning cut-off frequency equal to 0.8 cycles/cm), a threshold 25% and 15% gradient, could show the liver and a short fracture in the middle of right lobe of the liver but misses any residual spleen fragment. (Study has been offered by Radiation Physics Unit, Department of Radiology, University of Athens).
