Influence of sequence type on the extent of the susceptibility artifact in MRI--a shoulder specimen study after suture anchor repair

RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
T HeroldM Lenhart

Abstract

To compare the extent of susceptibility artifacts after metallic suture anchor implantation by analyzing 14 different MRI sequences. 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. 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 non-saturated sequence. Gradient echo sequences should not be used after...Continue Reading

Citations

Feb 8, 2006·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·T ErnstbergerH M Klinger
May 8, 2007·The Spine Journal : Official Journal of the North American Spine Society·Thorsten ErnstbergerEckhardt Grabbe
May 8, 2007·The Spine Journal : Official Journal of the North American Spine Society·Thorsten ErnstbergerGottfried Buchhorn
Aug 24, 2007·Der Orthopäde·A Hedtmann, G Heers
Apr 7, 2007·Journal of Spinal Disorders & Techniques·Thorsten Ernstberger, Gabert Heidrich
Mar 15, 2006·Magnetic Resonance Imaging Clinics of North America·R Richard Ramnath

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