Quantification of 4D-flow MRI relies on signal magnitude and phase of blood but can be affected by high signal intensities from surrounding tissues. By acquiring imaging volume in multiple overlapping slabs, together with MT preparation further to saturate tissue, 3D-TOF inflow enhancement can be used to improve vessel signal in the 4D-flow magnitude image. The scan-time penalty associated with acquiring multiple slabs was avoided by accelerating the scan with undersampled distributed-spiral acquisition. The proposed method greatly increased vessel contrast and improved depiction of blood vessels, which for 4D-flow MRI translate to more reliable flow quantification and vessel segmentations.
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