Matthews Robert, Salerno Michael Joseph, Vaska Paul, Hindman Halley
Department of Radiology, Stony Brook University Hospital, NY, USA.
Department of Biomedical Engineering, Stony Brook University, NY, USA.
World J Nucl Med. 2020 Jan 24;19(1):85-88. doi: 10.4103/wjnm.WJNM_10_19. eCollection 2020 Jan-Mar.
Positron emission tomography-magnetic resonance (PET-MR) hybrid imaging is a relatively new imaging modality combining the superb MR contrast capabilities among different soft-tissue structures with the high sensitivity of PET functional imaging. With the development of any new technology, a variety of limitations will be encountered including the introduction of new types of artifacts. In this case report, we present a restaging PET-MR scan for multiple myeloma that showed severely decreased fluorodeoxyglucose activity in the liver on the PET attenuated corrected images. Careful analysis showed the cause of the decreased activity to be the improper density assignment on the mu map caused by iron deposition within the liver. Follow-up imaging showed reversal of the phenomena following improvement of liver disease.
正电子发射断层扫描-磁共振（PET-MR）混合成像技术是一种相对较新的成像方式，它将不同软组织结构之间出色的磁共振对比能力与PET功能成像的高灵敏度相结合。随着任何新技术的发展，都会遇到各种限制，包括引入新型伪影。在本病例报告中，我们展示了一例针对多发性骨髓瘤的PET-MR重新分期扫描，该扫描在PET衰减校正图像上显示肝脏中氟脱氧葡萄糖活性严重降低。仔细分析表明，活性降低的原因是肝脏内铁沉积导致μ图上密度分配不当。随访成像显示，肝病改善后该现象出现逆转。
