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Abstract #1524

Effect of T1 & Flip Angle Errors on Hepatic Arterial Fraction Calculation

Daniel Wilson1

1Medical Physics, Leeds Teaching Hospitals, Leeds, West Yorkshire, United Kingdom

Hepatic arterial fraction is often measured from dynamic contrast enhanced MRI data collected using a 3D spoiled gradient echo sequence. Errors in hepatic arterial fraction measurements as a consequence of flip angle and pre contrast T1 measurement errors are minimized if higher flip angles are used. The small errors found suggest that if a flip angle of 30 is prescribed then it is possible to use an assumed T1 rather than measure it.