In first part of this thesis, aspects of limited angular view 2-D image reconstruction using the characteristic of analytic continuity in Fourier domain of object is studied. In 2nd and 3rd part, optimum R.F. pulse shape construction and a new X-Y gradient coil design in NMR imaging are studied and their performances are analyzed.
Reconstruction algorithm of first part is based on the Inouye's Fourier Coefficient Estimation (FCE) technique for limited angular view image reconstruction. FCE technique is further extended and studied to improve the image quality.
In 2nd and 3rd part of this thesis, R.F. pulse and linear field gradient necessary for the spatially resolved Fourier transform NMR are studied. Selective 90˚ R.F. pulse shape is optimized to obtain better slice selection and X-Y gradient coil is designed to improve the linearity.
Computer simulation studies of limited angular view image reconstruction, R.F. pulse shape and field gradient coil design were carried out and results are presented in this thesis.
Object 함수가 주파수 영역에서 analytic continuity성질을 갖는 것을 이용하여 제한된 각에서 얻은 projection data 를 이용해 2차원 영상을 재구성하는 방법과, NMR 단층촬영시스템의 R.F.pulse파형 및 gradient coil의 기하학적 구조와 그의 직선성에 관해 연구하였다.
제한된 각의 data를 이용한 영상재구성에서는 object 영역과 주파수 영역에서의 windowing을 함으로써 FCE 기법만을 사용하는 경우보다 영상의 질을 더욱 개선하였다.
NMR 영상재구성 방법에서는 원자핵의 spin을 excite하기위해 R.F. pulse가 필요하며 또 물체를 공간적으로 구분하기 위해 선형 gradient자계가 필요하다. 여기서는 Selective 90˚ R.F.pulse의 최적파형을 구했으며 적은 전력과 동선을 이용해 넓은 영역의 선형 gradient를 갖기위한 X-Y gradient coil 에 관한 Computer simulation을 하였다.
