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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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To investigate MR artifacts induced by metallic implants, scans were obtained using both the ferromagnetic Drake clip and the nonferromagnetic Yasargil clip. Scans were taken through the area of clips using geometrical phantom. The MRI was performed by spin echo technique and gradient echo technique on both 2.0T and 0.5T MR unit. The authors evaluated the nature and differences of artifacts in each sequence and parameter. Artifacts induced by both clips were noted in the direction of frequency encoding gradient, and consisted of a region of signal loss abutted on one side by a curvilinear region of bright signal. Geometric distortion of image was marked in the Drake clip, but was minimal in the Yasargil clip under both 2.0T and 0.5T. Artifacts were more pronounced in the gradient echo technique than those of the spin echo technique on both 2.0T and 0.5T. Artifacts there were no differences in the nature of artifacts induced by the Drake clip among each parameter in the spin ec o technique under 2.0T, artifacts were slightly more pronounced in T2 weighted image under the 0.5T field, but no differences were found in the nature of artifacts induced by the Yasargil clip in the spin echo technique under both the 2.0T and 0.5T fields. Marked artifacts were induced through the small area of the Drake clip which were included in the scan plane, but induced artifacts were small when a small area of the Yasargil clip was included in the scan plane. It seemed likely that artifacts were slightly more pronounced in the 2.0T than the 0.5T field in both clips, but objective evaluation of the difference was difficult. In conclusion, these results can be an essential basis for the interpretation of MR images of patients with metallic implants.
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