Systematic evaluation of velocity-selective arterial spin labeling settings for placental perfusion measurement

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Anita A HarteveldEnrico De Vita

Abstract

Placental function is key for successful human pregnancies. Perfusion may be a sensitive marker for the in vivo assessment of placental function. Arterial spin labeling (ASL) MRI enables noninvasive measurement of tissue perfusion and it was recently suggested that ASL with velocity-selective (VS) labeling could be advantageous in the placenta. We systematically evaluated essential VS-ASL sequence parameters to determine optimal settings for efficient placental perfusion measurements. Eleven pregnant women were scanned at 3T using VS-ASL with 2D multislice echo planar imaging (EPI)-readout. One reference VS-ASL scan was acquired in all subjects; within subgroups the following parameters were systematically varied: cutoff velocity, velocity encoding direction, and inflow time. Visual evaluation and region of interest analyses were performed to compare perfusion signal differences between acquisitions. In all subjects, a perfusion pattern with clear hyperintense focal regions was observed. Perfusion signal decreased with inflow time and cutoff velocity. Subject-specific dependence on velocity encoding direction was observed. High temporal signal-to-noise ratios with high contrast on the perfusion images between the hyperintense r...Continue Reading

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Citations

Feb 5, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Isabell K BonesClemens Bos
Aug 15, 2021·Developmental Cognitive Neuroscience·Vidya RajagopalanMoriah E Thomason
Sep 26, 2021·Experimental Neurology·Nickie Andescavage, Catherine Limperopoulos

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