Fig. 3

Example improvement in lesion delineation using a respiratory compensated reconstruction. Four PET data sets were reconstructed. The first was the PET data acquired during the whole body acquisition (WB PET, a and e), which demonstrates mild ghosting and blurring (e, black arrows). The non-respiratory compensated full data set from the liver bed position (liver PET, b and f) demonstrates respiratory ghosting of multiple avid liver lesions (solid black box) as well as the spleen (dotted black box). Reconstructions using respiratory compensation (RC-liver PET, c and g) remove the respiratory ghosting of both the liver lesions and spleen. Reconstructing the liver bed position using non-respiratory compensated PET data using the same amount of time as the RC-liver PET acquisition (shortened PET, d and h) demonstrates blurring associated with respirations (h, black arrowhead)