What type of study is this?

This is a Quantitative Study study.

September 17, 2025

Effect of Saturation on Velocity-Selective Arterial Spin Labeling based Perfusion Quantification: Accounting for the Inflow of Fresh Blood

Key Points

Using a slab-selective saturation with a 2.0s delay improves CBF quantification accuracy while considering inflow effects.
Slab-selective saturation showed a scaling factor of 0.90 enhances CBF estimation compared to simple models.
Velocity-selective arterial spin labeling requires accounting for inflow of fresh spins for optimal quantification.
The study highlights the significance of tSNR efficiency in achieving accurate CBF quantification in imaging.

Abstract

Motivation: For velocity-selective arterial spin labeling (VSASL), a scaling factor (SIB) was recommended to correct the saturation recovery of arterial blood right before labeling. However, the SIB value needs to consider the inflow effect. Goal(s): To account for the inflow of fresh, unsaturated spins due to the limited coverage of the transmit body coil into VSASL-based CBF quantification. Approach: The SIB was measured using none-selective and slab-selective saturation with varied saturation times, respectively. Results: Slab-selective saturation with a 2.0s delay yielded optimal tSNR efficiency and SIB=0.90 provided more accurate CBF estimation than a simple saturation recovery model. Impact: To account for inflow effects, VSASL-based CBF quantification should use a slab-selective saturation with a 2.0s delay for optimal tSNR efficiency, and apply a scaling factor of 0.90 for more accurate CBF estimation than relying on the saturation recovery model.

Demander à l'IA

Bookmark