Abstract #0497
Single Breath-hold Renal Artery Blood Flow Measurements Using Spiral PCMR With r-r Interval Averaging
Jennifer Anne Steeden 1 , Grzegorz Kowalik 1 , Andrew Taylor 1 , and Vivek Muthurangu 1
1
Centre for Cardiovascular Imaging, UCL
Institute of Cardiovascular Science, London, United
Kingdom
Renal artery blood flow (RABF) can be accurately
measured using phase contrast MR (PCMR), however long
scan times are required. This study proposes averaging
data over an integer number of r-r intervals to measure
RABF with high spatial resolution during a single
breath-hold (~6 seconds). A novel golden-angle spiral
PCMR sequence was tested in-vivo (N=30), and the
limitations of the technique were tested in an in-silico
experiment. In-silico the stroke volumes (SV) measured
were within 6% of the true SV, for all heart rates and
vessel expansibility tested. In-vivo SVs correlated well
with a reference Cartesian PCMR sequence (r=0.9906,
P<0.0001).
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