지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.12
- 수록면
- 639 - 643 (5page)
- DOI
- 10.4283/JMAG.2020.25.4.639
이용수
초록· 키워드
오류제보하기
Magnetic resonance imaging (MRI) shows high contrast and resolution on the soft tissues and nervous tissues without radiation hazard, which is used as an essential diagnostic test in the radiology. Cross excitation means to show artifacts upon the signal loss from overlapped radio frequency (RF) in some anatomical locations during the image acquisition process with RF pulse. To lower cross excitation artifacts, their images were analyzed by the changes of flip angle, TR, and TE. Ingenia 3.0T CX MRI by Philips was used for image acquisition. Self-developed water phantom used for quality control of MRI was used. SNR values at 40 degree of flip angle were 1,354 ±7.12 and 214 ± 2.10; those at 70 degree were 1,375 ± 7.31 and 305 ± 2.12; and those at 90 degree were 1,413 ± 7.93 and 357 ± 2.33, for water and artifact, respectively. CNR values were 1,140 ± 7.01, 1,070 ± 7.18, and 1,056 ± 7.12 at 40, 70 and 90 degree of flip angle, respectively (P < 0.05). As f lip angle was lowered more, artifact was decreased more. In case of 90 degree of flip angle, artifact was decreased more as TR was longer. These results are anticipated to be used as the fundamental data to acquire more valued medical images in terms of diagnostics with MRI to diagnose various diseases.
목차
1. Introduction
2. Cross Talk and Cross Excitation Effects
3. Study Subjects and Methods
4. Results and Discussion
5. Conclusions
References
참고문헌 (15)
참고문헌 신청
A. S. Gaspar / 2019 / Magn. Reson. Med 81:477
S. Brandão / 2015 / Radiol. Med 120:705
남광현 / 2018 / Evaluation of Imaging Analysis with the Use of Oral Contrast Media for Abdominal MRI / Journal of Magnetics 23(3):364~369
한용수 / 2016 / Effects of Contrast Agent Concentration on the Signal Intensity and Turbo Factor of TSE and Slice-selective IR in T1-weighted Contrast Imaging / Journal of Magnetics 21(1):115~124
김지원 / 2018 / Analysis of Direction and area of Magnetic Susceptibility Artifact according to Frequency-encoding Changes in 3.0 Tesla MRI / Journal of Magnetics 23(4):570~577
S. Brandão / 2015 / Radiol. Med 120:705
남광현 / 2018 / Evaluation of Imaging Analysis with the Use of Oral Contrast Media for Abdominal MRI / Journal of Magnetics 23(3):364~369
한용수 / 2016 / Effects of Contrast Agent Concentration on the Signal Intensity and Turbo Factor of TSE and Slice-selective IR in T1-weighted Contrast Imaging / Journal of Magnetics 21(1):115~124
김지원 / 2018 / Analysis of Direction and area of Magnetic Susceptibility Artifact according to Frequency-encoding Changes in 3.0 Tesla MRI / Journal of Magnetics 23(4):570~577
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