Fig. 7
From: Monte Carlo-based quantitative pinhole SPECT reconstruction using a ray-tracing back-projector
Twelve consecutive SPECT slices (50 iterations) overlaid on the corresponding CT slices for a cardiac insert in a water-filled torso. The ventricle cavity was filled with water. The MCR and CT results are well registered with good contrast between the myocardium and ventricle. Despite the attenuation in the cavity water, the homogeneity of the activity in the myocardium is well recovered, albeit somewhat nosier than in Fig. 7, due to the modelling of attenuation in the forward-projector