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Proceedings Paper

Image quality and signal distribution in 1.5-T and 3-T MRI in mild traumatic brain injury patients
Author(s): Maija E. Rossi; Prasun Dastidar; Pertti Ryymin; Aarne Ylinen; Juha Öhman; Seppo Soimakallio; Hannu Eskola
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Paper Abstract

Clear standards are lacking in the imaging modalities of the deficit in mild traumatic brain injury (MTBI) patients. The purpose of this study is to compare the image quality by signal distribution between 1.5 Tesla and 3 Tesla MRI in turbo spin echo (TSE) and gradient echo (GRE) images in normal hospital settings and to find preferences for which field to use in MTBI patients. We studied 40 MTBI patients with TSE and GRE; 20 patients were imaged at 1.5 T and 20 at 3 T. The imaging parameters were optimized separately for the two scanners. Histograms of the signal distribution in 22 ROIs were fitted to a 1-peak Gaussian model and the resulting peak positions were scaled in respect to the peak positions of genu of the corpus callosum and the caudate nuclei. Correlation of the contrast of the ROIs in reference to genu of the corpus callosum between both the two scanners and the two imaging sequences was good. Image contrast was similar at both in the TSE images; in the GRE images contrast improved from 1.5 T to 3 T. However, based on peak positions and widths, a slight drawback in the separability between the ROIs was observed when 1.5 T MRI was replaced by 3 T. No clear improvement in tissue contrast or separability of 3 T was found compared to 1.5 T. Imaging of MTBI with 3 T should therefore be based on other advantages of high-field imaging, such as improved SNR and spatial resolution.

Paper Details

Date Published: 14 March 2009
PDF: 9 pages
Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72584M (14 March 2009); doi: 10.1117/12.812224
Show Author Affiliations
Maija E. Rossi, Tampere Univ. Hospital (Finland)
Prasun Dastidar, Tampere Univ. Hospital (Finland)
Tampere Medical School (Finland)
Pertti Ryymin, Tampere Univ. Hospital (Finland)
Aarne Ylinen, Tampere Univ. Hospital (Finland)
Juha Öhman, Tampere Univ. Hospital (Finland)
Seppo Soimakallio, Tampere Univ. Hospital (Finland)
Tampere Medical School (Finland)
Hannu Eskola, Tampere Univ. Hospital (Finland)
Tampere Univ. of Technology (Finland)


Published in SPIE Proceedings Vol. 7258:
Medical Imaging 2009: Physics of Medical Imaging
Ehsan Samei; Jiang Hsieh, Editor(s)

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