Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
권호 표지

Intra-Motion Compensation Using CSRS method in MRI

  • Ro, Y.M. (Dept. of Computer Science, Taejon University, Dept. of Information & Communication Engineering, KAIST) ;
  • Yi, J.H. (Dept. of Information & Communication Engineering, KAIST) ;
  • Cho, Z.H. (Dept. of Information & Communication Engineering, KAIST)
  • Published : 1994.12.01
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Abstract

In the conventional Fourier imaging method in MRI (Magnetic Resonance Imaging), intramotion such as pulsatile flow makes zipper-like artifact along the phase encoding direction. On the other hand, line-integral projection reconstruction (LPR) method has advantages such as imaging of short T2, object and reduction of the flow artifact by elimination of the flow-induced phase fluctuation. The LPR, however, necessarily requires time consuming filtering and back-projection processes, so that the reconstruction takes long time. To overcome the long reconstruction time of the LPR and to obtain the flow artifact reduction effect, we adopted phase corrected concentric square raster sampling (CSRS) method and improved its imaging performance. The CSRS is a fast reconstruction method which has the same properties with the LPR. In this paper, we proposed a new method of flow artifact reduction using the CSRS method. Through computer simulations and experiments, we verified that the proposed method can eliminate phase fluctuations, thereby reducing the flow artifact and re- markably shorten the reconstruction time which required long time in the LPR.

Keywords

References

  1. J. Magn. Reson. v.18 NMR Fourier Zeugmatography A.Kumar;D.Welti;R.R.Ernst
  2. Proc. IEEE v.70 Fourier transform nuclear magnetic resonance tomographic imaging Z.H.Cho;H.S.Kim;H.B.Song;J.Cimming
  3. IEEE Trans. NS v.21 The Fourier reconstruction of a head section L.A.Shepp;B.F.Logan
  4. Fourier transform NMR spectroscopy D.Shaw
  5. Multidimensional Digital Signal Processing D.E.Dudgeon;R.M.Mersereau
  6. IEEE Proc. v.62 Digital reconstruction of multidimensional signals from their projections R.M.Merserea;A.V.Oppenheim
  7. Magn. Reson. in Med. v.29 A Novel Flow-Suppression Technique Using Tailored RF Pulses Y.M.Ro;Z.H.Cho
  8. Magn. Reson. Med. v.19 Reduction of Flow Artifact in NMR Diffusion Imaging Using View-Angle Tilted Line-Integral Projection Reconstruction K.J.Jung;Z.H.Cho
  9. Selected Topics in Imaging Science Direct Fourier Reconstruction Technique in NMR tomography Z.H.Cho;O.Nalcioglu;J.C.Jung;H.B.Song;O.Nalcioglu(ed.);Z.H.Cho(ed.)