[Obstacles to the routine use of magnetic resonance imaging--results of a multicenter study for evaluating nuclear magnetic resonance tomography].

Within the framework of this study, the factors that impair the value of MR scans were also investigated and analysed. It was found that artifacts occurred in a large number of examinations that exercised a negative effect on the results. Artifacts are particularly seen in the thorax (54%) and upper abdomen (57%), but they have also been reported in 23% of the CNS examinations. The sources of such artifacts were mainly movements in the investigated layer, whereas other causes were negligible. In the 21,633 examined patients no undesirable effects caused by the examination were noted that would have impaired the patient or the course of the study. On an average, 88% of the examinations were performed with normal tolerance of the examination. In the remaining cases there was motor unrest or claustrophobia requiring special measures, thus hampering the course of the examination.