Implementation of a fast gradient-echo SVD encoding technique for dynamic imaging

Magn Reson Med. 1996 Apr;35(4):554-62. doi: 10.1002/mrm.1910350415.


In the paper, the results of a fast gradient-echo implementation of the singular value decomposition (SVD) encoding technique for dynamic imaging are presented. The method used is an adaptation with several critical modifications of a keyholetype approach previously proposed but not implemented. The method was tested by imaging the events following injection of a contrast agent into a phantom, producing a series of dynamic image updates. It is demonstrated that, for this type of application, the SVD encoding technique adequately follows dynamic changes with even a small number of encodes. The result is compared qualitatively to that obtained by standard Fourier-based keyhole imaging and is shown to provide improved spatial resolution of dynamic events when updating with the same number of encodes.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Algorithms*
  • Contrast Media
  • Fourier Analysis
  • Gadolinium DTPA
  • Humans
  • Image Processing, Computer-Assisted
  • Magnetic Resonance Imaging / methods*
  • Organometallic Compounds
  • Pentetic Acid / analogs & derivatives
  • Phantoms, Imaging
  • Signal Processing, Computer-Assisted


  • Contrast Media
  • Organometallic Compounds
  • Pentetic Acid
  • Gadolinium DTPA