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Accelerated magnetic resonance fingerprinting using soft-weighted key-hole (MRF-SOHO)

Author

Listed:
  • Gastao Cruz
  • Torben Schneider
  • Tom Bruijnen
  • Andreia S Gaspar
  • René M Botnar
  • Claudia Prieto

Abstract

Object: To develop a novel approach for highly accelerated Magnetic Resonance Fingerprinting (MRF) acquisition. Materials and methods: The proposed method combines parallel imaging, soft-gating and key-hole approaches to highly accelerate MRF acquisition. Slowly varying flip angles (FA), commonly used during MRF acquisition, lead to a smooth change in the signal contrast of consecutive time-point images. This assumption enables sharing of high frequency data between different time-points, similar to what is done in some dynamic MR imaging methods such as key-hole. The proposed approach exploits this information using a SOft-weighted key-HOle (MRF-SOHO) reconstruction to achieve high acceleration factors and/or increased resolution without compromising image quality or increasing scan time. MRF-SOHO was validated on a standard T1/T2 phantom and in in-vivo brain acquisitions reconstructing T1, T2 and proton density parametric maps. Results: Accelerated MRF-SOHO using less data per time-point and less time-point images enabled a considerable reduction in scan time (up to 4.6x), while obtaining similar T1 and T2 accuracy and precision when compared to zero-filled MRF reconstruction. For the same number of spokes and time-points, the proposed method yielded an enhanced performance in quantifying parameters than the zero-filled MRF reconstruction, which was verified with 2, 1 and 0.7 (sub-millimetre) resolutions. Conclusion: The proposed MRF-SOHO enabled a 4.6x scan time reduction for an in-plane spatial resolution of 2x2 mm2 when compared to zero-filled MRF and enabled sub-millimetric (0.7x0.7 mm2) resolution MRF.

Suggested Citation

  • Gastao Cruz & Torben Schneider & Tom Bruijnen & Andreia S Gaspar & René M Botnar & Claudia Prieto, 2018. "Accelerated magnetic resonance fingerprinting using soft-weighted key-hole (MRF-SOHO)," PLOS ONE, Public Library of Science, vol. 13(8), pages 1-18, August.
    • Handle: RePEc:plo:pone00:0201808
    DOI: 10.1371/journal.pone.0201808
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    References listed on IDEAS

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    1. Dan Ma & Vikas Gulani & Nicole Seiberlich & Kecheng Liu & Jeffrey L. Sunshine & Jeffrey L. Duerk & Mark A. Griswold, 2013. "Magnetic resonance fingerprinting," Nature, Nature, vol. 495(7440), pages 187-192, March.
    2. Martijn A. Cloos & Florian Knoll & Tiejun Zhao & Kai T. Block & Mary Bruno & Graham C. Wiggins & Daniel K. Sodickson, 2016. "Multiparametric imaging with heterogeneous radiofrequency fields," Nature Communications, Nature, vol. 7(1), pages 1-10, November.
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