Correction of T2 Distortion in Multi-Excitation Rare Sequence

Koichi Oshio, Manbir Singh

研究成果: Article査読

5 被引用数 (Scopus)


Correction schemes have been implemented to correct for T2 distortions in a multi-excitation RARE (rapid acquisition with relaxation enhancement) sequence where data from multiple echoes and multiple excitations are combined. Computer simulation studies and human imaging studies have been conducted to develop and test the correction procedures. A direct method and an iterative technique have been investigated. The direct technique utilizes Hermitian symmetry of the T2 weighted data and is shown to reduce distortions in T2 weighted images. The iterative scheme begins with an estimation of T2, wherefrom k-space data are computed and compared to the true data to provide error images. The error images are then used to refine iteratively the reconstructed images at a specified echo time. The iterative procedure has been used to improve T1 weighted images acquired through a sequence based on acquisition of two half-plane Fourier samples. These correction techniques should enable a practical implementation of RARE for producing T1 and T2 weighted images comparable to standard spin echo images.

ジャーナルIEEE Transactions on Medical Imaging
出版ステータスPublished - 1992 3月

ASJC Scopus subject areas

  • ソフトウェア
  • 放射線技術および超音波技術
  • コンピュータ サイエンスの応用
  • 電子工学および電気工学


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