• DocumentCode
    249057
  • Title

    Regularized estimation of Bloch-Siegert |B1+| maps in MRI

  • Author

    Hao Sun ; Grissom, W.A. ; Fessler, J.A.

  • Author_Institution
    Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan-Ann Arbor, Ann Arbor, MI, USA
  • fYear
    2014
  • fDate
    27-30 Oct. 2014
  • Firstpage
    3646
  • Lastpage
    3650
  • Abstract
    The Bloch-Siegert (BS) method is a fast method for finding RF transmit fields (|B1+| maps) in MRI based on the phase shift induced by an off-resonance pulse. The phase calculation can be very noisy in regions with low image magnitude, leading to inaccurate estimations using the conventional method. This paper proposes a penalized likelihood (PL) estimator of the |B1+| map in the image domain, and a fast optimization transfer algorithm for solving the problem. We validated our proposed method with both simulation and experimental data sets.
  • Keywords
    biomedical MRI; medical image processing; optimisation; BS method; Bloch-Siegert |B1+| maps regularized estimation; MRI; PL estimator; RF transmit fields; off-resonance pulse; optimization transfer algorithm; penalized likelihood estimator; phase calculation; phase shift; Algorithm design and analysis; Cost function; Estimation; Magnetic resonance imaging; Method of moments; Noise; Radio frequency;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Image Processing (ICIP), 2014 IEEE International Conference on
  • Conference_Location
    Paris
  • Type

    conf

  • DOI
    10.1109/ICIP.2014.7025740
  • Filename
    7025740
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=249057