Vogel H, Rehwinkel M
Rontgenblatter. 1987 May;40(5):150-3.
The hazard involved in MR tomography if there are foreign parts in the body made of metal, is assessed. There are certain hazard-influencing factors. As far as the foreign body is concerned, these are: ability to become magnetized, size, length, elasticity, sharp edges or ends, and sharp surfaces. In the human body itself, risk factors are determined by the position of the foreign body in or near sensitive organs such as cerebrum, nerves, vessels, lungs, eyes, ears and the heart; other factors are the fixation to bones or lack of fixation in hollow organs. One should assume when assessing the risk that the foreign body consists of iron that is capable of complete magnetisation. In that case the attacking forces will not exceed the 25 to 36 fold value of the foreign body's own weight. It is thus possible to predict with some measure of probability whether the position of the foreign body will shift during MR examination and whether the examination can result in injury.
评估了人体存在金属异物时进行磁共振断层扫描所涉及的风险。存在某些影响风险的因素。就异物而言，这些因素包括：被磁化的能力、尺寸、长度、弹性、尖锐边缘或末端以及尖锐表面。在人体自身方面，风险因素取决于异物在诸如大脑、神经、血管、肺、眼睛、耳朵和心脏等敏感器官内或附近的位置；其他因素是异物与骨骼的固定情况或在中空器官内是否固定。在评估风险时应假定异物由能够完全磁化的铁组成。在这种情况下，冲击力不会超过异物自身重量的25至36倍。因此，可以在一定程度上概率性地预测异物在磁共振检查期间的位置是否会移动以及检查是否会导致损伤。
