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
- 2014.6
- 수록면
- 185 - 191 (7page)
이용수
초록· 키워드
오류제보하기
In this study we evaluated that flow rate changes affect the (time of flight) TOF image and contrast-enhanced (CE) in a three-dimensional TOF angiography. We used a 3.0T MR System, a nonpulsatile flow rate model. Saline was used as a fluid injected at a flow rate of 11.4 cm/sec by auto injector. The fluid signal strength, phantom body signal strength and background signal strength were measured at 1, 5, 10, 15, 20 and 25-th cross-section in the experienced images and then they were used to determine signal-to-noise ratio and contrastto- noise ratio. The inlet, middle and outlet length were measured using coronal images obtained through the maximum intensity projection method. As a result, the length of inner cavity was 2.66 mm with no difference among the inlet, middle and outlet length. We also could know that the magnification rate is 49-55.6% in inlet part, 49-59% in middle part and 49-59% in outlet part, and so the image is generally larger than in the actual measurement. Signal-to-noise ratio and contrast-to-noise ratio were negatively correlated with the fluid velocity and so we could see that signal-to-noise ratio and contrast-to-noise ratio are reduced by faster fluid velocity. Signal-to-noise ratio was 42.2-52.5 in 5-25th section and contrast-to-noise ratio was from 34.0-46.1 also not different, but there was a difference in the 1st section. The smallest 3D TOF MRA measure was 2.51 ± 0.12 mm with a flow velocity of 40 cm/s. Consequently, 3D TOF MRA tests show that the faster fluid velocity decreases the signal-to-noise ratio and contrast-to-noise ratio, and basically it can be determined that 3D TOF MRA and 3D CE MRA are displayed larger than in the actual measurement.
목차
1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusion
References
참고문헌 (31)
참고문헌 신청
1. [학술지(정기간행물)] - H. J. Lee / 1991 / / J. Korean. Med. Assoc 34 : 758 ~
2. [학술지(정기간행물)] - H. J. Myung / 1989 / / Korean J. Neurology 7 : 179 ~
3. [학술지(정기간행물)] - I. H. Song / 1992 / / Korean J. Med 43 : 637 ~
4. [학술지(정기간행물)] - 이병철 / 1999 / 한림 뇌졸중 등록 자료를 통한 1,129명의 급성 뇌졸중 환자의 임상 양상 / 대한뇌졸중학회지 1 (1) : 21 ~ 27
5. [학술지(정기간행물)] - P. Schramm / 2004 / / Stroke 35 : 1652 ~
2. [학술지(정기간행물)] - H. J. Myung / 1989 / / Korean J. Neurology 7 : 179 ~
3. [학술지(정기간행물)] - I. H. Song / 1992 / / Korean J. Med 43 : 637 ~
4. [학술지(정기간행물)] - 이병철 / 1999 / 한림 뇌졸중 등록 자료를 통한 1,129명의 급성 뇌졸중 환자의 임상 양상 / 대한뇌졸중학회지 1 (1) : 21 ~ 27
5. [학술지(정기간행물)] - P. Schramm / 2004 / / Stroke 35 : 1652 ~
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UCI(KEPA) : I410-ECN-0101-2015-420-001709723