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
Department of Diagnostic and Interventional
Radiology and Neuroradiology, University Hospital Essen,
L. Hahn Institute for MRI, University Duisburg-Essen,
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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