“FDG PET/CT is most useful when there is clinical suspicion or other evidence for disease recurrence or metastases,” study coauthor Rathan M. Subramaniam, of the department of radiology at the University of Texas Southwestern Medical Center in Dallas, said in a statement, advising that “using FDG PET/CT for routine surveillance without any clinical suspicion should be discouraged until its value for patient survival outcomes is fully established.”  {read more here}