Frequency and etiology of solitary hot spots in the pelvis at whole-body positron emission tomography/computed tomography imaging.

Purpose: To determine the frequency and etiology of a single hypermetabolic focus within the pelvis with no other areas of increased 18-fluorodeoxyglucose (FDG) uptake in the reminder of the whole body in an oncological population.

Method And Materials: We retrospectively examined the first 700 whole-body PET/CT scans performed at our institution for baseline staging or follow-up of cancer and identified all patients with a solitary focus of increased FDG uptake in the pelvis. All available medical records and imaging findings in these patients were reviewed in order to determine the etiology of increased FDG uptake.

Role of IV iodinated contrast material in 18F-FDG PET/CT of liver metastases.

Objective: The purpose of our study was to investigate the role of IV iodinated contrast material in the evaluation of hepatic metastases at (18)F-FDG PET/CT.

Materials And Methods: We retrospectively identified 39 patients (25 men and 14 women) with suspected isolated hepatic metastases from colorectal cancer who underwent FDG PET/CT. The CT protocol included acquisition of unenhanced and multiphase contrast-enhanced CT images through the liver.

Correcting tumour SUV for enhanced bone marrow uptake: retrospective 18F-FDG PET/CT studies.

Purpose: The concentration of F-FDG in the bone marrow is usually low. One common cause of high uptake is due to bone marrow stimulating drugs administered in conjunction with chemotherapy or radiation therapy. It has been hypothesized that the sequestration of F-FDG to the bone marrow may reduce the standardized uptake value (SUV) of a tumour.