Zhu Zhaohui, Doss Mohan, Tan Huangying, Feigenberg Steven, Yu Jian Q
Department of Nuclear Medicine, Peking Union Medical College Hospital, Beijing, China.
J Nucl Med Technol. 2011 Dec;39(4):249-51. doi: 10.2967/jnmt.111.089011. Epub 2011 Aug 24.
Unintentional intraarterial injection of radiotracers may cause artifacts leading to difficulties in accurately interpreting PET/CT images. We report a case of a 73-y-old man with a history of metastatic colon cancer who underwent a PET/CT scan for restaging. In the PET scan, there was intense and diffuse distribution of (18)F-FDG in his left forearm and hand. This is a classic sign of an accidental intraarterial injection of (18)F-FDG in the antecubital region. Similar phenomena after inadvertent intraarterial injection of other radiotracers are reviewed. The associated risk factors, preventive measures, and radiation dose to the arm are discussed.
放射性示踪剂意外动脉内注射可能会导致伪影，从而难以准确解读PET/CT图像。我们报告一例73岁男性，有转移性结肠癌病史，因再分期接受PET/CT扫描。在PET扫描中，其左前臂和手部出现（18）F-FDG强烈且弥漫性分布。这是在前臂肘前区意外动脉内注射（18）F-FDG的典型征象。本文回顾了其他放射性示踪剂意外动脉内注射后的类似现象。并讨论了相关危险因素、预防措施以及手臂所受辐射剂量。
