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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