Direct fourier transform approach to NMR imaging : improved KWE method with spin echo techniqueFourier 변환을 이용한 핵자기 공명 단층 촬영 : spin-echo 기술을 이용한 개선된 KWE 방법
Direct Fourier transform NMR (Nuclear Magnetic Resonance) tomographic method originally proposed by Kumar-Welti-Ernst (KWE) has been improved by using spin echo technique. This new KWE method provides four quadrant data set in 2-D Fourier space which is essential to correct frequency dependent phase shift. Pulse sequence for the newly proposed method is analyzed and computer simulations have also been carried out in conjunction with expected experimental situations. The experimental results of this new KWE method are presented and compared with the computer simulation results.