Fig. 7
From: 3D printed non-uniform anthropomorphic phantoms for quantitative SPECT
SPECT images obtained from measured (top row) and simulated (middle row) projections of the two thyroid phantoms, shown as maximum intensity projections. SPECT image reconstruction was made with (leftmost columns) and without (rightmost columns) resolution recovery. Bottom row shows the volume obtained by thresholding of the SPECT images as a function of the threshold value, expressed in terms of absolute activity concentration. Graphs include results from the measured (blue line), simulated (green line) SPECT images and the true phantom volume (horizontal dashed line), where each graph corresponds to the two images above, respectively. The mean of the Euclidean distance, \(\overline{d}\), between the sample points on the curves are presented in the plots