Nitz Wolfgang R, Brinker Gerd, Diehl Dirk, Frese Georg
Siemens AG, Medical Solutions, MR Division, Erlangen, and the Department of Radiology, University Hospital of Regensburg, Regensburg, Germany.
Invest Radiol. 2005 Dec;40(12):773-6. doi: 10.1097/01.rli.0000185898.59140.91.
Recent publications of the magnetic resonance safety profile of neurostimulators, cardiac pacemakers, and other implanted devices imply that these devices are no longer a contraindication for magnetic resonance imaging. It is very promising that patients who have these implanted devices may in the future no longer be denied an important diagnostic modality. On the other hand, the safety recommendations given in a number of publications included the maximum permissible whole-body specific absorption rate (SAR). This is one factor indicating potential heating, but there are a number of other factors that may have an even higher impact on the potential heating of tissue in the vicinity of leads or implanted devices. Using only the whole-body SAR as a recommendation for a safety profile is potentially dangerous.
近期有关神经刺激器、心脏起搏器及其他植入式设备的磁共振安全性的出版物表明，这些设备不再是磁共振成像的禁忌证。非常有希望的是，植入这些设备的患者未来可能不再被拒绝使用这一重要的诊断方式。另一方面，一些出版物给出的安全建议包括最大允许全身比吸收率（SAR）。这是表明潜在发热的一个因素，但还有许多其他因素可能对导线或植入式设备附近组织的潜在发热产生更大影响。仅将全身SAR用作安全状况的建议可能是危险的。
