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Abstract #1620

Peripheral Fresh Blood Imaging with High Spatial Resolution Using Compressed Sensing

Hao Li1, Martin John Graves1,2, Nadeem Shaida2, Akash Prashar2, David John Lomas1,2, and Andrew Nicholas Priest1,2
1Department of Radiology, University of Cambridge, Cambridge, United Kingdom, 2Department of Radiology, Addenbrooke’s Hospital, Cambridge, United Kingdom

A time-efficient high-resolution 3D fresh-blood imaging technique is proposed. The acquisition matrix size was increased from 256 to 512 in both readout and in-plane phase-encoding dimensions. Imaging efficiency was improved using compressed sensing together with k-space subtraction, so that the acquisition time is not prolonged compared to standard-resolution protocols. To avoid flow-related arterial signal voids, velocity-compensation gradients were used instead of velocity-spoiling gradients, and the spoiler gradients in the slice-encoding direction were increased. By decreasing the pixel size, the overall vessel sharpness and depiction of small vessels were significantly improved, at the cost of reducing the contrast-to-noise ratio.

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