Department of Clinical Physiology, Nuclear Medicine and PET, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100 Copenhagen, Denmark.
MAGMA. 2013 Feb;26(1):173-81. doi: 10.1007/s10334-012-0345-4. Epub 2012 Sep 21.
Integrated whole-body PET/MRI tomographs have become available. PET/MR imaging has the potential to supplement, or even replace combined PET/CT imaging in selected clinical indications. However, this is true only if methodological pitfalls and image artifacts arising from novel MR-based attenuation correction (MR-AC) are fully understood.
Here we present PET/MR image artifacts following routine MR-AC, as most frequently observed in clinical operations of an integrated whole-body PET/MRI system.
A clinical adoption of integrated PET/MRI should entail the joint image display and interpretation of MR data, MR-based attenuation maps and uncorrected plus attenuation-corrected PET images in order to recognize potential pitfalls from MR-AC and to ensure clinically accurate image interpretation.
集成式全身 PET/MRI 断层扫描仪已经问世。PET/MR 成像有可能在某些特定临床应用中补充甚至取代联合的 PET/CT 成像。然而，只有当基于新型磁共振（MR）衰减校正（MR-AC）的方法学缺陷和图像伪影得到充分理解时，这才是正确的。
在此，我们展示了在常规 MR-AC 后出现的 PET/MR 图像伪影，这些伪影在集成式全身 PET/MRI 系统的临床操作中最为常见。
为了识别 MR-AC 带来的潜在陷阱并确保临床准确的图像解读，在采用集成式 PET/MRI 时，应联合显示和解读 MR 数据、基于 MR 的衰减图以及未经校正和校正后的 PET 图像。
