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Sensitivity of T2-weighted FSE sequences towards physiological iron depositions in normal brains at 1.5 and 3.0 T

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Abstract

To evaluate the sensitivity of T2-weighted fast spin-echo (FSE) sequences to physiological iron depositions in normal brains at MR imaging field strengths of 1.5 and 3.0 T. T2-weighted FSE sequences acquired at 1.5 and 3.0 T clinical imaging systems (Gyroscan Intera, Philips Medical Systems, Best, The Netherlands) were compared by means of MRI in phantoms (n=6) and healthy volunteers (n=10). Contrast-to-noise ratios (CNRs) of tubes doped with iron oxides at different concentrations and of brain areas with physiological iron depositions (nucleus ruber, substantia nigra, globus pallidus) were calculated for either field strength. Apparent susceptibility effects of iron-containing brain structures were qualitatively analyzed by comparing the degree of visible hypointensity by a score system at either field strength. The mean CNR of iron oxide tubes and iron-containing brain areas was significantly decreased at 3.0 T. Qualitative analysis confirmed these measurements. Detection and diagnosis of brain disorders with altered iron content such as neurodegenerative parkinsonian disorders (NPD) or intracerebral hemorrhage should benefit from the increased sensitivity of T2-weighted FSE sequences to susceptibility effects at 3.0 T.

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Authors and Affiliations

  1. Department of Clinical Radiology, University of Muenster, Albert-Schweitzer-Strasse 33, 48149, Münster, Germany

    T. Allkemper, W. Schwindt, D. Maintz, W. Heindel & B. Tombach

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  1. T. Allkemper
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  2. W. Schwindt
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  3. D. Maintz
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  4. W. Heindel
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  5. B. Tombach
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Correspondence to T. Allkemper.

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Allkemper, T., Schwindt, W., Maintz, D. et al. Sensitivity of T2-weighted FSE sequences towards physiological iron depositions in normal brains at 1.5 and 3.0 T. Eur Radiol 14, 1000–1004 (2004). https://doi.org/10.1007/s00330-004-2241-4

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  • DOI: https://doi.org/10.1007/s00330-004-2241-4

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