메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색

초록· 키워드

오류제보하기
In-vivo conductivity reconstruction using transmit field (B1+) information of MRI was proposed. We assessed theaccuracy of conductivity reconstruction in the presence of statistical noise in complex B1+ map and provided a parametricmodel of the conductivity-to-noise ratio value. Materials and Methods: The B1+ distribution was simulated for a cylindrical phantom model. By adding complex Gaussiannoise to the simulated B1+ map, quantitative conductivity estimation error was evaluated. The quantitative evaluationprocess was repeated over several different parameters such as Larmor frequency, object radius and SNR of B1+ map. Aparametric model for the conductivity-to-noise ratio was developed according to these various parameters. Results: According to the simulation results, conductivity estimation is more sensitive to statistical noise in B1+ phase thanto noise in B1+ magnitude. The conductivity estimate of the object of interest does not depend on the external object surroundingit. The conductivity-to-noise ratio is proportional to the signal-to-noise ratio of the B1+ map, Larmor frequency,the conductivity value itself and the number of averaged pixels. To estimate accurate conductivity value of the targetedtissue, SNR of B1+ map and adequate filtering size have to be taken into account for conductivity reconstruction process. In addition, the simulation result was verified at 3T conventional MRI scanner. Conclusion: Through all these relationships, quantitative conductivity estimation error due to statistical noise in B1+ map ismodeled. By using this model, further issues regarding filtering and reconstruction algorithms can be investigated for MREPT.

목차

등록된 정보가 없습니다.

참고문헌 (24)

참고문헌 신청

이 논문의 저자 정보

최근 본 자료

전체보기

댓글(0)

0