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DOI: 10.1148/rg.254045155
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RadioGraphics 2005;25:1031-1043
© RSNA, 2005

EDUCATION EXHIBIT

Imaging of Pelvic Malignancies with In-Line FDG PET–CT: Case Examples and Common Pitfalls of FDG PET1

Naveen Subhas, MD, Pavni V. Patel, MD, Harpreet K. Pannu, MD, Heather A. Jacene, MD, Elliot K. Fishman, MD and Richard L. Wahl, MD

1 From the Russell H. Morgan Department of Radiology & Radiological Science, Johns Hopkins University, 601 N Caroline St, Rm 3223, Baltimore, MD 21287-0817. Presented as an education exhibit at the 2003 RSNA Annual Meeting. Received August 3, 2004; revision requested October 25; final revision received January 21, 2005; accepted March 7. R.L.W. received honoraria from GE Medical Systems, Philips, Cardinal Health, and GSK; received grant support from GE Medical Systems; is a consultant of NMP and a consultant and stockholder of Threshold Pharmaceuticals; and holds licensed technology and patents from GSK. All other authors have no financial relationships to disclose. Address correspondence to R.L.W. (e-mail: rwahl{at}jhmi.edu).

The role of 2-[fluorine 18]fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) in combination with computed tomography (CT) in the evaluation of pelvic malignancies has been rapidly growing in recent years. FDG PET has proved to be valuable in the evaluation of a variety of pelvic malignancies, including colorectal cancer, uterine cervical cancer, ovarian cancer, endometrial cancer, and non-Hodgkin lymphoma. However, a number of pitfalls are commonly encountered at FDG PET, including normal physiologic activity in bowel, ovaries, endometrium, and blood vessels and focal retained activity in ureters, bladder diverticula, pelvic kidneys, and urinary diversions. The use of an in-line FDG PET–CT system, with special attention given to proper patient preparation and scanning protocol, often provides valuable information to help localize and define disease and avoid potential diagnostic pitfalls.

© RSNA, 2005




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