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Updated: Jul 8, 2025

Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury
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Serial Migration of Iatrogenic Microembolus on 18 F-FDG PET/CT Images

Yeon-Hee Han1, Hwan-Jeong Jeong, Seok Tae Lim

  • 1From the Department of Nuclear Medicine, Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Cyclotron Research Center, Molecular Imaging and Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital, Jeonju, Jeonbuk, Republic of Korea.

Clinical Nuclear Medicine
|December 18, 2023
PubMed

A 51-year-old woman who had a history of partial nephrectomy underwent an 18 F-FDG PET/CT image for a routine health checkup. Focal intense FDG avidity without any anatomical correlation on CT was detected in the lung. On the delayed image after 20 minutes, the focal activity migrated to a more peripheral portion. An iatrogenic microembolus is a rare but crucial false-positive finding that nuclear physicians should be aware of. Our case emphasizes the importance of meticulous FDG injection and cautious interpretation. In addition, delayed PET/CT imaging through wet reading can aid in diagnosing and help prevent unnecessary investigations.

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