Using compressed sensing-accelerated 4D flow MRI to observe venous sinus hemodynamics：Performance at different acceleration factors

Motivation: Due to the small diameter of intracranial-venous sinus, higher spatial resolution is required when using 4D-flow MRI to observe hemodynamics, which greatly prolongs scan time. Goal(s): Accelerating 4D-flow MRI of intracranial-venous sinus with compressed sensing (CS), and comparing the performance of CS acceleration factors (AFs). Approach: The 4D-flow hemodynamic of straight sinus, superior sagittal sinus and transverse sinus with different AFs (SENSE4, CS4, CS6, CS8, and CS10) were compared in 8 healthy volunteers. Results: Compared to the reference (SENSE4) scan, the hemodynamic for the straight sinus, several parameters were underestimated by CS6-CS10，while for the other sinuses obtained by CS4-CS10 showed no significant difference. Impact: 4D flow MRI with acceleration by compressed sensing can be used as a efficient method to evaluate venous sinus hemodynamics in routine clinical practice.