Weidman Elizabeth K, Dean Kathryn E, Rivera William, Loftus Michael L, Stokes Thomas W, Min Robert J
Department of Radiology, NewYork-Presbyterian Weill Cornell, 525 E. 68th St, New York, NY 10065.
Weill Cornell Imaging at NewYork-Presbyterian, 520 East 70th Street, New York, NY 10021.
Clin Imaging. 2015 Nov-Dec;39(6):935-7. doi: 10.1016/j.clinimag.2015.09.002. Epub 2015 Sep 4.
MRI offers detailed diagnostic images without ionizing radiation; however, there are considerable safety concerns associated with high electromagnetic field strength. With increasing use of high and ultra high (7T) magnetic field strength, adequate patient preparation and screening for ferrous material is increasingly important. We review current safety standards for patient screening and preparation and how they are implemented at our institution. In addition, we describe a novel supplemental screening technique wherein the lights are dimmed in response to detected ferrous metal at the threshold of Zone IV.
磁共振成像（MRI）可提供详细的诊断图像且无需电离辐射；然而，高电磁场强度会带来相当多的安全问题。随着高场强和超高场强（7T）的使用越来越多，对患者进行充分的准备以及筛查含铁物质变得愈发重要。我们回顾了当前患者筛查和准备的安全标准以及这些标准在我们机构的实施情况。此外，我们描述了一种新颖的补充筛查技术，即在检测到处于IV区阈值的含铁金属时调暗灯光。
