Strohm O, Kivelitz D, Gross W, Schulz-Menger J, Liu X, Hamm B, Dietz R, Friedrich M G
Universitätsklinikum, Medizinische Fakultät der Humboldt-Universität zu Berlin, Medizinische Klinik mit Schwerpunkt Molekulare und Klinische Kardiologie (Buch), Berlin, Germany.
J Cardiovasc Magn Reson. 1999;1(3):239-45. doi: 10.3109/10976649909088336.
The safety of most available implantable intracoronary stents during magnetic resonance imaging (MRI) has not been sufficiently tested. Minor, but possibly clinically significant, increases in temperature have not been excluded. We measured temperature changes of 14 different stents clinically in use or currently tested for release on the world market. Stents were examined in 1.0- and 1.5-T MR scanners with multiple sequences used in routine cardiac and thoracic MRI examinations ("clinical worst case") and after implantation of the stents into the coronary arteries of excised pig hearts (1.5-T scanner only). We used a highly sensitive infrared camera with a thermal resolution of 10 mK and did not see significant heating of any stent during the examinations. We conclude that MRI is safe in patients with the currently available intracoronary stents.
大多数市售的冠状动脉内植入支架在磁共振成像（MRI）期间的安全性尚未得到充分测试。尚未排除温度有轻微但可能具有临床意义的升高。我们在临床上测量了14种不同的正在使用或目前正在全球市场上进行释放测试的支架的温度变化。在1.0和1.5特斯拉的MR扫描仪中，使用常规心脏和胸部MRI检查中使用的多个序列（“临床最坏情况”）对支架进行检查，并在将支架植入切除的猪心脏的冠状动脉后（仅使用1.5特斯拉扫描仪）进行检查。我们使用了热分辨率为10 mK的高灵敏度红外相机，在检查过程中未发现任何支架有明显发热。我们得出结论，对于目前使用的冠状动脉内支架患者，MRI是安全的。
