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Abstract #4912

Comparative magnetic resonance imaging at 3T und 7T for the evaluation of diffuse axonal injuries

Christoph Moenninghoff 1,2 , Oliver Kraff 2 , Stefan Maderwald 2 , Jan Altmeppen 1 , Lale Umutlu 1 , Mark E Ladd 2,3 , Michael Forsting 1 , and Marc Schlamann 1

1 Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany, 2 Erwin L. Hahn Institute for MRI, University Duisburg-Essen, Essen, Germany, 3 Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Germany

Traumatic microbleeds (TMBs) are regarded as a radiological marker for diffuse axonal injury (DAI). This study compares the detection of TMBs on 3T and 7T magnetic resonance images. 8 volunteers with DAI were examined with MR scanners equipped with 32-channel head coils at both field strengths. TMBs were counted on susceptibility weighted images (SWI), with similar and 14-times increased spatial resolution at 7T. 7T SWI depicted 28% and 40% more TMBs compared to 3T with similar and higher spatial resolution, respectively. Hence, 7T SWI may optimize diagnostics of DAI in inconclusive and in medicolegal cases.

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