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 new 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.
Kumar-Welti-Ernst( KWE ) 에 의하여 제창한 Fourier 변환을 이용한 핵자기 공명 단층 촬영을 spin-echo 기술을 이용하여 개선하였다. 이 새로운 방법은 주파수 특성의 위상을 교정하기 위하여 필요한 2-D Fourier좌평 상에서 4상환 데이타를 얻는다. 이 방법에서 제안한 pulse 순서를 분석하고, computer simulation을 예상되는 실험결과와 computer simulation 결과들을 비교 분석하여 제시하였다.