Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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DANTE Fast MR imaging Using Frequency Modulation

주파수 변조를 이용한 MR DANTE 고속 영상법

  • Ro, Y.M. (Dept. of Computer Engineering, TaeJeon University) ;
  • Chung, S.T. (Dept. of Information & Communication, KAIST) ;
  • Hong, I.K. (Dept. of Information & Communication, KAIST) ;
  • Cho, Z.H. (Dept. of Information & Communication, KAIST)
  • 노용만 (대전 대학교 컴퓨터공학과) ;
  • 정성택 (한국과학기술원 정보 및 통신공학과) ;
  • 홍인기 (한국과학기술원 정보 및 통신공학과) ;
  • 조장희 (한국과학기술원 정보 및 통신공학과)
  • Published : 1995.05.12
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Abstract

The original DANTE sequence and its variations have limitation in excitation profile (a sinc function-like excitation) due to the finite duration of the DANTE pulsetrain. This sinc function-like selection profile excites only a small fraction of the spins in the pixel thereby results in poor signal to noise ratio (only about ${\sim}1%$ of normal MR imaging sequence). Therefore, this poor signal to noise ratio (SNR) has been the main drawback of the original DANTE sequence. To improve the signal to noise ratio, phases of individual RF pulses in the DANTE pulse train were modulated so that more spins in the object were excited ($1{\sim}3$). We have introduced a new FM (Frequency Modulation) DANTE sequence and analyzed the signal intensity and excitation profiles.

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