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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