Fig. 4
From: Respiratory motion correction of PET using MR-constrained PET-PET registration
Coronal views of a small lesion, position 4 for volunteer 2, displayed with a \(4\,\mathrm {mm}\) Gaussian filter. The intensity scale is shown to the right. The lesion (indicated with an arrow) is relatively indistinct in the UC case, but clear in the IC case. In this example, the PET-PET registration (PT) has performed moderately well, whereas the direct correspondence method (DC) has performed poorest of the 3 correction methods. Also notice the blurred appearance of the liver-lung boundary in the UC image