Parallelized Hybrid TGRAPPA Reconstruction for Real-Time Interactive MRI

  • Haris Saybasili
  • Peter Kellman
  • J. Andrew Derbyshire
  • Elliot R. McVeigh
  • Michael A. Guttman
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5242)


Real-time parallel MRI reconstruction was demonstrated using a hybrid implementation of the TGRAPPA algorithm. The GRAPPA coefficients were calculated in k-space and applied in the image domain after appropriate transformation, thereby achieving improved speed and excellent image quality. Adaptive B1-weighted combining of the per coil images permitted use of pre-calculated composite image domain weights providing significant decrease in computation. The weight calculation was decoupled from the real-time image reconstruction as a parallel processing thread which was updated in an adaptive manner to speed convergence in the event of interactive change in scan plane. The computation was parallelized and implemented on a general purpose multi-core architecture. Reconstruction speeds of 65-70 frames per second were achieved with a matrix of 192x144 with 15 coils.


Block Size Image Domain Acceleration Rate Receiver Coil Acquisition Matrix 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Haris Saybasili
    • 1
    • 2
  • Peter Kellman
    • 1
  • J. Andrew Derbyshire
    • 1
  • Elliot R. McVeigh
    • 3
  • Michael A. Guttman
    • 1
  1. 1.NHLBINational Institutes of Health, DHHSBethesdaUSA
  2. 2.Biomedical Engineering InstituteBogazici UniversityIstanbulTurkey
  3. 3.Dept. of Biomedical EngineeringJohns Hopkins UniversityBaltimoreUSA

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