Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Susceptibility Effects v.s Flow Effects in Functional MRI

뇌의 기능영상에 있어서 자화율효과와 혈류효과 연구

  • Park, J.B. (Dept. of Information and Communication, KAIST) ;
  • Chung, S.C. (Dept. of Information and Communication, KAIST) ;
  • Park, S.H. (Dept. of Information and Communication, KAIST) ;
  • Ro, Y.M. (Dept. of Computer Sciences, Taejon University) ;
  • Cho, Z.H. (Dept. of Information and Communication, KAIST)
  • 박종배 (한국과학기술원 정보 및 통신공학과) ;
  • 정순철 (한국과학기술원 정보 및 통신공학과) ;
  • 박세혁 (한국과학기술원 정보 및 통신공학과) ;
  • 노용만 (대전대학교 전산과) ;
  • 조장희 (한국과학기술원 정보 및 통신공학과)
  • Published : 1993.11.12
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Abstract

In MR functional imaging, it is shown that the signal change during photic activation is composed of two terms, i.e. the inflow effect and the susceptibility effect. Relatively the inflow effect affects the data obtained by CGE on the condition of short $T_E$(15ms) and large $\alpha$(90degree). The susceptibility effect, however, mainly contributes to the data on the condition of large $T_E$(35ms) and small $\alpha$(30degree). In this apper, we will discriminate the susceptibility effect for the intermingled data affected both flow effect and susceptibility effect. Finally susceptibility only functional imaging is proposed by using TRFGE.

Keywords