A New Perspective on the 4-point Balanced Velocity-encoding
Yu Ding 1 , Rizwan Ahmad 1 , Ning Jin 2 , and Orlando Simonetti 1
The Ohio State University, Columbus, OH,
Healthcare, Chicago, IL, United States
This study provides a new perspective on the 4-point
balanced velocity-encoding technique from the Fourier
transform/frequency domain point of view. We show that,
from a Fourier encoding point of view, each of the
velocity directions is encoded into a sub-band centered
on a different frequency by amplitude modulation.
Velocity reconstruction is shown to be equivalent to a
traditional filter design problem in the Fourier domain.
A straight-forward velocity reconstruction algorithm
based on a simple Fourier domain filter is described and
tested in a volunteer. Comparing to the traditional
sliding window reconstruction, the proposed method
eliminates artifactual oscillations in the velocity
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