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Eur Radiol. 2006 Sep;16(9):2067-73. Epub 2006 Apr 29.

Higher sensitivity in the detection of inflammatory brain lesions in patients with clinically isolated syndromes suggestive of multiple sclerosis using high field MRI: an intraindividual comparison of 1.5 T with 3.0 T.

Author information

1
Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, 53105, Bonn, Germany. mike.wattjes@ukb.uni-bonn.de

Abstract

The purpose of this study was to determine the sensitivities in the detection of inflammatory lesions in patients with clinically isolated syndromes suggestive of multiple sclerosis at 3.0 T and 1.5 T. MR imaging of 40 patients at both field strengths was performed in separate sessions including contiguous axial slices of T2 turbo spin-echo (T2 TSE), fluid-attenuated-inversion-recovery (FLAIR) and pre- and postcontrast T1 spin-echo (T1 SE). Inflammatory lesions > 3 mm in size were counted and categorized according to their anatomic location. Lesion conspicuity was assessed on a five-point scale. At 3.0 T, 13% more white matter lesions could be identified on the FLAIR sequence and on the T2 TSE sequence. Compared to 1.5 T 7.5% more contrast-enhancing lesions were detected at 3.0 T. The higher detection rate at 3.0 T was significant for the infratentorial (p = 0.02) and juxtacortical (p < 0.01) region on the FLAIR as well as for the infratentorial (p = 0.03), juxtacortical (p = 0.02) and periventricular (p = 0.03) region on the T2 TSE sequence. The lesion conspicuity was significantly better at 3.0 T for FLAIR and T2 TSE sequences (p<0.01; p=0.01). In conclusion, high-field MRI at 3.0 T provides a significantly higher detection rate of inflammatory brain lesions especially in the infratentorial, juxtacortical and periventricular anatomic region.

PMID:
16649033
DOI:
10.1007/s00330-006-0195-4
[Indexed for MEDLINE]

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