Abstract #2744
Effects of Temporal Resolution and Velocity Encoding Strategies on Aortic Flow Measurement with Two-Dimensional Phase-Contrast MRI
Can Wu 1,2 , Susanne Schnell 2 , and Michael Markl 1,2
1
Biomedical Engineering, Northwestern
University, Chicago, Illinois, United States,
2
Radiology,
Northwestern University, Chicago, Illinois, United
States
The purpose of this study was to systematically
investigate the effects of temporal resolution and
different velocity encoding strategies on aortic flow
quantification. 2D phase-contrast MRI was performed in
15 volunteers with three different velocity encoding
schemes (i.e. single-directional through-plane,
interleaved and sequential three-directional velocity
encoding). The results demonstrated that high temporal
resolution (e.g. ~5ms) may be required for accurately
measuring aortic peak velocities and relatively low
temporal resolution (~20ms) can be used for aortic blood
flow quantification. In addition, aortic peak velocities
were underestimated with single-directional velocity
encoding compared with 3-directional velocity encoding.
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