부분적인 경사자계를 이용한 고속 자기공명 영상촬영기법

Fast MR Imaging Technique by Using Locally-Linear Gradient Field

  • 양윤정 (고려대학교 자연과학대학 전자 및 정보공학부) ;
  • 이종권 (고려대학교 자연과학대학 전자 및 정보공학부, 한국과학기술원 서울분원 정보 및 통신공학과)
  • 발행 : 1996.03.01

초록

The purpose of this paper is to propose a new localized imaging method of reduced imaging time luting a locally-linear gradient. Since most fast MR(Magnetic Resonance) imaging methods need the whole $\kappa$-space(Spatial frequency space) data corresponding to the whole imaging area, there are limitstions in reducing the minimum imaging time. The imaging method proposed in this paper uses a specially-made gradient coil generating a local ramp-shape field and uniform field outside of the imaging areal Conventional imaging sequences can be used without any RF/gradient pulse sequence modifiestions except the change in the number of encoding steps and the field of view.

키워드

참고문헌

  1. J. Phys. C. v.10 Mansfield, P.
  2. Magn. Reson. Med. v.28 Fast spiral coronary artery imgaing Meyer, C.H.;Hu, B.S.;Nishimura;Macovski
  3. Magn. Reson. Med. v.13 Snapshot FLASH MRI. Applications to T₁,T₂and chemical shift imaging Haase, A.
  4. Magn. Res. v.66 Image-selected in vivo spectroscopy (ISIS). A new technique for spatially selsctive NMR spectroscopy Ordidge, R.J.;Connely, A.;Lohman, J.A.B., J.
  5. Magn. Res. Med. v.5 Localized imaging using stimulated echoes Mills, P.;Chew, W.;Litt, A.;Moseley, M.
  6. Proc. SMRM XI. Comparison of minimum inductance and minimum power gradient coil design strategies Turner, R.
  7. Rev. Sci. Instrum. v.62 no.11 Insertable biplanar gradient coils for manetic resonance imagng Martens, M.A.;Petropoulos, L.S.;Brown, R.W.