Herold, Thomas and Caro, W. C. and Heers, G. and Perlick, L. and Grifka, Joachim and Feuerbach, S. and Nitz, W. and Lenhart, M. (2004) Influence of sequence type on the extent of the susceptibility artifact in MRI - a shoulder specimen study after suture anchor repair. ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN, 176 (9). pp. 1296-1301. ISSN 1438-9029,
Full text not available from this repository. (Request a copy)Abstract
Purpose: To compare the extent of susceptibility artifacts after metallic suture anchor implantation by analyzing 14 different MRI sequences. Materials and Methods: A metallic suture anchor was implanted in the central area of three glenoid porcine specimens. The specimens were imaged with a 1.5 T scanner using a protocol of 14 standard sequences including gradient echo, spin echo and turbo spin echo sequences with and without fat-saturation. Artifact size was measured for each specimen and sequence. The resulting mean artifact areas were determined for each type of sequence and the mean values of the three specimens compared. Results: Gradient echo-sequences produced significantly larger artifact areas than the spin echo and turbo spin echo sequences, whereby the artifacts of the 3D-gradient echo sequences were smaller than the artifacts of the 2D-gradient echo sequences. A turbo spin echo sequence with a high readout band width and a short effective echo time showed the best results. For the conventional spin echo sequence, a reduction in the echo time did not significantly decrease the artifact size. Spectral fat-saturation did not affect the area of the susceptibility artifact compared to the nonsaturated sequence. Conclusion: Gradient echo sequences should not be used after metallic suture anchor repair. Turbo spin echo sequences showed a decrease in the artifact size compared to conventional spin echo sequences and should be performed with a short effective echo time and a high band width. Spectral fat-saturation did not increase the artifact size significantly.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MAGNETIC-SUSCEPTIBILITY; GLENOID LABRUM; SPIN-ECHO; FIELD INHOMOGENEITIES; METALLIC ARTIFACTS; BANKART REPAIR; ARTHROGRAPHY; CONTRAST; IMPLANTS; IMAGES; shoulder; magnetic resonance (MR); artifact; susceptibility |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Jun 2021 09:31 |
| Last Modified: | 30 Jun 2021 09:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37302 |
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