Abstract #4206

On-scanner sparse sampling for high resolution structural imaging of the human brain at 7T

Matthan W.A. Caan^1,2, Abdallah G. Motaal¹, Bram F. Coolen¹, Wouter V. Potters¹, Kerry Zhang¹, Pieter Buur², and Aart J. Nederveen¹

¹Radiology, Academic Medical Center, Amsterdam, Netherlands, ²Spinoza Centre for Neuroimaging, Amsterdam, Netherlands

We aimed to increase spatial resolution while maintaining scanning time for 3D-T1 weighted imaging by on-scanner undersampling at 7T. A 3DT1-weighted structural scan with a resolution of 0.5 mm³ was acquired with 4 times variable poisson disc compressed sensing (CS) undersampling. For comparison, scans with resolutions of 0.5 and 0.7 mm³ were acquired, with SENSE undersampling adapted to match scanning time.The CS-reconstructed scan showed no streaking artifacts, was less hampered by noise in deep brain regions, had better contrast between gray matter and CSF and less partial voluming effects.

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