采用铸造方法制作牙科合金试样，分别为：普通镍铬合金16个，贵金属合金8个，并对8个镍铬合金试件清洗后行镀金处理。
Dental alloy test pieces were made by casting, among them, 16 test pieces were Ni-Cr alloys and 8 ones were gold alloys.
目的对比钴铬合金、低钛合金及镍铬合金3种贱金属合金铸造冠，在3.0 T及1.5 T磁共振成像检查时，产生金属伪影的最大面积及伪影涉及的扫描层数。
Objective To investigate the influence of three dental alloys casting crowns on the artifacts of MRI imaging during the examination of 3.0T MRI and 1.5T MRI.
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