Pulse wave velocity with 4D flow MRI: Systematic differences and age-related regional vascular stiffness
2014 (English)In: Magnetic Resonance Imaging, ISSN 0730-725X, E-ISSN 1873-5894, Vol. 32, no 10, 1266-1271 p.Article in journal (Refereed) Published
Purpose: The objective of this study was to compare multiple methods for estimation of PWV from 4D flow MRI velocity data and to investigate if 4D flow MRI-based PWV estimation with piecewise linear regression modeling of travel-distance vs. travel time is sufficient to discern age-related regional differences in PWV. Methods: 4D flow MRI velocity data were acquired in 8 young and Solder (age: 23 +/- 2 vs. 58 +/- 2 years old) normal volunteers. Travel-time and travel-distance were measured throughout the aorta and piecewise linear regression was used to measure global PWV in the descending aorta and regional PWV in three equally sized segments between the top of the aortic arch and the renal arteries. Six different methods for extracting travel-time were compared. Results: Methods for estimation of travel-time that use information about the whole flow waveform systematically overestimate PWV when compared to methods restricted to the upslope-portion of the waveforms (p less than 0.05). In terms of regional PWV, a significant interaction was found between age and location (p less than 0.05). The age-related differences in regional PWV were greater in the proximal compared to distal descending aorta. Conclusion: Care must be taken as different classes of methods for the estimation of travel-time produce different results. 4D flow MRI-based PWV estimation with piecewise linear regression modeling of travel-distance vs. travel time can discern age-related differences in regional PWV well in line with previously reported data.
Place, publisher, year, edition, pages
Elsevier , 2014. Vol. 32, no 10, 1266-1271 p.
Pulse wave velocity; MR flow imaging; Vascular stiffness; 4D flow MRI; Phase-contrast MRI; Aging
IdentifiersURN: urn:nbn:se:liu:diva-112805DOI: 10.1016/j.mri.2014.08.021ISI: 000344721800014PubMedID: 25171817OAI: oai:DiVA.org:liu-112805DiVA: diva2:777205
Funding Agencies|Swedish Research Council; Swedish Heart-Lung Foundation; Medical Research Council of Southeast Sweden (FORSS)2015-01-082014-12-172015-03-18