• Magn Reson Med · Jun 2009

    Modified PROPELLER approach for T2-mapping of the abdomen.

    • Jie Deng and Andrew C Larson.
    • Department of Radiology, Northwestern University, Chicago, Illinois 60611, USA.
    • Magn Reson Med. 2009 Jun 1; 61 (6): 1269-78.

    AbstractQuantitative abdominal T(2) measurements may be useful for lesion differentiation and functional tissue characterization. However, T(2) mapping of the abdomen with conventional spin-echo (SE) and turbo-spin-echo (TSE) approaches can be challenging due to physiologic motion artifacts. Multishot TSE-based PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction) can provide superior image quality due to reduced sensitivity to motion artifacts. With echo-reordering to accurately estimate effective echo times and an extended slice thickness ratio to reduce stimulated echo effects, a modified PROPELLER approach may permit accurate, robust abdominal T(2) measurements. We validated the accuracy of our modified PROPELLER T(2)-mapping approach by comparison to conventional SE measurements in a phantom model and demonstrated the feasibility of acquiring accurate, high-quality abdominal T(2) maps in normal volunteers.

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