(A) study on fast NMR imaging by spiral scanning method = 나선형 주사 방법에 의한 고속 핵자기 공명 단층 촬영에 관한 연구

In this thesis, a new fast NMR imaging method using Spiral Scanning Imaging (SSI) technique is proposed and experimented with KAIS 1.5 KGauss resistive magnet system. By SSI technique whole spatial frequency domain data is obtained by scanning along the Archimedes spiral curve with time varying oscillating gradients. No abrupt changes in gradient waveforms make it advantageous for the transient effect because of the gradient coils inductance. The proposed new method is compared to the other fast NMR imaging algorithms. No serious one-directional degradation by $T_2^\star$ decay is observed and found to be a characteristic for the proposed method. Transient responses of oscillating gradient waveforms for given gradient coils is analyzed and its compensation schemes are proposed. As a suggested method, an improved version of SSI, which is named "Butterfly pulse sequence" was tested in an attempt to eliminate $T_2^\star$ decay effect during data aquisition.
Advisors
Cho, Zang-Heeresearcher조장희researcher
Publisher
한국과학기술원
Issue Date
1985
Identifier
64649/325007 / 000831131
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과, 1985.2, [ iii, 44 p. ]

URI
http://hdl.handle.net/10203/39708
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=64649&flag=t
Appears in Collection
EE-Theses_Master(석사논문)
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