MRIにおける金属アーチファクトの検討 (第一報)

概要

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This report evaluates a variety of dental materials with respect to MR imaging artifacts in vitro. The increasing use of MR imaging as a clinical method necessitates a study of artifacts that may appear on these images. A wide variety of metallic materials are used in the dentistry and some can potentially cause distortion of MR images. MR imaging was performed using a superconductive magnetom of 1. 5 Tesra (Magnetom; Simens). Imaging was obtained with the use of a single 4-mm thick slice two-dimensional Fourier transform rapid technique. Pulse sequence was obtained by Flash method at flip angle=90, echo delay (TE)=10 ms, repetition time (TR)=400 ms. The following results were obtained; 1) Titanium, gold and high nickel content dental materials produced no discernible artifacts. 2) Stainless steel alloys caused major imaging artifacts.
社団法人日本口腔外科学会の論文