Bilateral Multiband 4D Flow MRI of the Carotid Arteries at 7T.

ABSTRACT:

Purpose

Simultaneous multislab (SMSb) 4D flow MRI was developed and implemented at 7T for accelerated acquisition of the 3D blood velocity vector field in both carotid bifurcations.

Methods

SMSb was applied to 4D flow to acquire blood velocities in both carotid bifurcations in sagittal orientation using a local transmit/receive coil at 7T. B1+ transmit efficiency was optimized by B1+ shimming. SMSb 4D flow was obtained in 8 healthy subjects in single-band (SB) and multiband (MB) fashion. Additionally, MB data were retrospectively undersampled to simulate GRAPPA R = 2 (MB2_GRAPPA2), and both SB datasets were added to form an artificial MB dataset (SumSB). The band separation performance was quantified by signal leakage. Peak velocity and total flow values were calculated and

SUBMITTER: Schmitter S 

PROVIDER: S-EPMC7652092 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature