View : 35 Download: 0

Velocity-selective magnetization-prepared non-contrast-enhanced cerebral MR angiography at 3 Tesla: Improved immunity to B0/B1 inhomogeneity

Title
Velocity-selective magnetization-prepared non-contrast-enhanced cerebral MR angiography at 3 Tesla: Improved immunity to B0/B1 inhomogeneity
Authors
Qin, QinShin, TaehoonSchaer, MichaelGuo, HuaChen, HanweiQiao, Ye
Ewha Authors
신태훈
Issue Date
2016
Journal Title
MAGNETIC RESONANCE IN MEDICINE
ISSN
0740-3194JCR Link

1522-2594JCR Link
Citation
MAGNETIC RESONANCE IN MEDICINE vol. 75, no. 3, pp. 1232 - 1241
Keywords
non-contrast-enhanced MRAcerebral MRAvelocity-selective pulse train
Publisher
WILEY-BLACKWELL
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
PurposeTo develop a Fourier-transform based velocity-selective (VS) pulse train that offers improved robustness to B0/B1 inhomogeneity for non-contrast-enhanced cerebral MR angiography (MRA) at 3 Tesla (T). MethodsVS pulse train I and II with different saturation bands are proposed to incorporate paired and phase cycled refocusing pulses. Their sensitivity to B0/B1 inhomogeneity was estimated through simulation and compared with a single refocused VS pulse train. The implementation was compared to standard time of flight (TOF) among eight healthy subjects. ResultsIn contrast to single refocused VS pulse train, the simulated VS profiles from proposed pulse trains indicate much improved immunity to field inhomogeneity in the brain at 3T. Successive application of two identical VS pulse trains yields a better suppression of static tissue at the cost of 20 approximate to 30% signal loss within large vessels. Average relative contrast ratios of major cerebral arterial segments applying both pulse train I and II with two preparations are 0.810.06 and 0.81 +/- 0.05, respectively, significantly higher than 0.67 +/- 0.07 of TOF-MRA. VS MRA, in particular, the pulse train II with the narrower saturation band, depicts more small vessels with slower flow. ConclusionVS magnetization-prepared cerebral MRA was demonstrated among normal subjects on a 3T scanner. Magn Reson Med 75:1232-1241, 2016. (c) 2015 Wiley Periodicals, Inc.
DOI
10.1002/mrm.25764
Appears in Collections:
엘텍공과대학 > 휴먼기계바이오공학부 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE