(A) multi-contrast imaging method using steady-state free precession with alternating RF flip angles고주파 펄스가 교번하는 정상 상태를 이용한 다중 대조도 자기공명 영상 기법

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To obtain multi-contrast images including fat-suppressed contrast image, a novel multi-contrast imaging method using a steady-state free precession sequence with alternating RF flip angles is proposed. The proposed method uses the balanced steady-state free precession (bSSFP) sequence with two flip angles. In general, the conventional bSSFP sequence has its own unique contrast, which combines both FID signal and echo signal under a steady state condition. By using alternating RF flip angles and RF phase cycling, various image contrasts weighted by PD, T1, and T2 can be obtained. The proposed method offers multi-contrast images with fat suppression by using the combination of two images obtained just after alternating RF pulses, respectively. As demonstrated by simulations, phantom and in-vivo experiments, the proposed method provides multi-contrast knee images including fat-suppressed contrast images. The proposed method can be a useful tool for clinical diagnosis, such as the cartilage segmentation and the fast screening of lesions.
Advisors
Park, Hyun Wookresearcher박현욱researcher
Description
한국과학기술원 :전기및전자공학부,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기및전자공학부, 2018.8,[ix, 68 p. :]

Keywords

balanced steady state free precession (bSSFP)▼acondition number▼afat suppression▼amulti-contrast imaging▼asingular value decomposition (SVD); 정상 상태 펄스 시퀀스▼a다중 대조도▼a교번하는 고주파 신호▼a지방 억제▼a특이값 분해

URI
http://hdl.handle.net/10203/265202
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=827944&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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