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Abstract #0922

An optimised subtraction approach for subtractive NCE-MRA techniques based on principal component analysis

Hao Li1, Shuo Wang1, Andrew Nicholas Priest1, Martin John Graves1, and David John Lomas1

1Department of Radiology, University of Cambridge, Cambridge, United Kingdom

An optimised subtraction approach is developed to improve the background signal suppression in subtractive Non-Contrast-Enhanced MR Angiography (NCE-MRA) and Venography (NCE-MRV) techniques. Principal component analysis (PCA) is used to correct the intensity difference of background tissue in dark-blood images (DBIs) and bright-blood images (BBIs). Compared with the direct subtraction operation, the proposed approach significantly improved the background signal suppression in all the evaluated cases including femoral Fresh Blood Imaging (FBI)-MRA, iliac Flow-Sensitive Dephasing (FSD)-MRV and FSD-MRA for the thoracic central veins.

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