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Aortic 4D flow: Quantification of signal-to-noise ratio as a function of field strength and contrast enhancement for 1.5T, 3T, and 7T
Magnetic resonance in medicine, 2015-05, Vol.73 (5), p.1864-1871
Hess, Aaron T.
Bissell, Malenka M.
Ntusi, Ntobeko A.B.
Lewis, Andrew J.M.
Tunnicliffe, Elizabeth M.
Greiser, Andreas
Stalder, Aurelien F.
Francis, Jane M.
Myerson, Saul G.
Neubauer, Stefan
Robson, Matthew D.
2015
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Hess, Aaron T.
Bissell, Malenka M.
Ntusi, Ntobeko A.B.
Lewis, Andrew J.M.
Tunnicliffe, Elizabeth M.
Greiser, Andreas
Stalder, Aurelien F.
Francis, Jane M.
Myerson, Saul G.
Neubauer, Stefan
Robson, Matthew D.
Titel
Aortic 4D flow: Quantification of signal-to-noise ratio as a function of field strength and contrast enhancement for 1.5T, 3T, and 7T
Ist Teil von
Magnetic resonance in medicine, 2015-05, Vol.73 (5), p.1864-1871
Ort / Verlag
United States: Blackwell Publishing Ltd
Erscheinungsjahr
2015
Quelle
Wiley-Blackwell Journals
Beschreibungen/Notizen
Purpose To investigate for the first time the feasibility of aortic four‐dimensional (4D) flow at 7T, both contrast enhanced (CE) and non‐CE. To quantify the signal‐to‐noise ratio (SNR) in aortic 4D flow as a function of field strength and CE with gadobenate dimeglumine (MultiHance). Methods Six healthy male volunteers were scanned at 1.5T, 3T, and 7T with both non‐CE and CE acquisitions. Temporal SNR was calculated. Flip angle optimization for CE 4D flow was carried out using Bloch simulations that were validated against in vivo measurements. Results The 7T provided 2.2 times the SNR of 3T while 3T provided 1.7 times the SNR of 1.5T in non‐CE acquisitions in the descending aorta. The SNR gains achieved by CE were 1.8‐fold at 1.5T, 1.7‐fold at 3T, and 1.4‐fold at 7T, respectively. Conclusion The 7T provides a new tool to explore aortic 4D flow, yielding higher SNR that can be used to push the boundaries of acceleration and resolution. Field strength and contrast enhancement at all fields provide significant improvements in SNR. Magn Reson Med 73:1864–1871, 2015. © 2014 Wiley Periodicals, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0740-3194
eISSN: 1522-2594
DOI: 10.1002/mrm.25317
Titel-ID: cdi_proquest_miscellaneous_1680456263
Format
–
Schlagworte
4D flow
,
Adult
,
aorta
,
Aorta - physiology
,
Aortography - methods
,
blood flow
,
Blood Flow Velocity - physiology
,
Contrast Media
,
Feasibility Studies
,
Humans
,
Image Enhancement - methods
,
Image Processing, Computer-Assisted - methods
,
Imaging, Three-Dimensional - methods
,
Magnetic Resonance Angiography - methods
,
Male
,
Meglumine - analogs & derivatives
,
Middle Aged
,
Organometallic Compounds
,
Reference Values
,
Signal-To-Noise Ratio
,
ultrahigh field
,
Young Adult
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