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Abstract #2067

Highly Accelerated NCE-MRA Using Complex Subtraction with Intensity Correction: Improved Reconstruction Accuracy and Background Tissue Suppression

Hao Li1, Andrew Nicholas Priest2, Martin John Graves2, and David John Lomas1

1Department of Radiology, University of Cambridge, Cambridge, United Kingdom, 2Department of Radiology, Addenbrooke’s Hospital, Cambridge, United Kingdom

We propose a compressed sensing reconstruction method for highly accelerated subtractive non-contrast-enhanced MRA, based on complex subtraction in k-space. This method applies intensity difference correction between bright- and dark-blood image sets before reconstruction and uses a phase correction procedure to remove background artefacts caused by complex subtraction. Experimental results demonstrate improved background tissue suppression. Compared with magnitude subtraction approaches, the proposed method achieved higher reconstruction accuracy at large acceleration factors, permitting the use of higher acceleration factors without unacceptable loss of image quality.

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