Neeta Pandit-taskar, MD

Positron-emission tomography(PET)–computed tomography(CT) has added a new dimensionto the imaging of cancers andcombination PET-CT scanners are becomingincreasingly universal. Theuse of combination scanners has increasedrapidly over the past 2 years-industry estimates are that the majorityof PET units sold throughout the worldwill be combination PET-CT scanners-and the authors have providedtheir own clinical experience and areview of the literature. While there issubstantial literature on the clinicalutility of PET alone, the use of PETCTis relatively new. The authors suggestthere is incremental benefit tothe addition of structural information(ie, CT) obtained at the same time asthe functional PET imaging.