Example of SSTR PET demonstrating higher Krenning score than 111In-pentetreotide in low-volume disease. This patient was graded as having Krenning score of 4 on SSTR PET (A) but 0 on SPECT (B-D) and planar imaging (E). Extent of disease was graded as 1 by 3 readers (e.g., 1-3 lesions smaller than 2 cm). MIP = maximum-intensity projection.
TA Hope, University of California-San Francisco, and C Millo, National Cancer Institute