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Abstract #2066

Highly accelerated NCE-MRA: Phase correction to remove background artefacts for complex subtraction

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

For subtractive Non-Contrast-Enhanced MR Angiography (NCE-MRA), complex subtraction of k-space data (prior to reconstruction) can exploit the sparsity of the difference images for under-sampled dataset reconstruction, but it causes background artefacts. This study proposed a phase correction method to restore the polarity of negative signal and null background artefacts.

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