3D R 2 * mapping of the placenta during early gestation using free-breathing multiecho stack-of-radial MRI at 3T

Journal of Magnetic Resonance Imaging : JMRI
Tess ArmstrongHolden H Wu

Abstract

Multiecho gradient-echo Cartesian MRI characterizes placental oxygenation by quantifying R 2 * . Previous research was performed at 1.5T using breath-held 2D imaging during later gestational age (GA). To evaluate the accuracy and repeatability of a free-breathing (FB) 3D multiecho gradient-echo stack-of-radial technique (radial) for placental R 2 * mapping at 3T and report placental R 2 * during early GA. Prospective. Thirty subjects with normal pregnancies and three subjects with ischemic placental disease (IPD) were scanned twice: between 14-18 and 19-23 weeks GA. 3T. FB radial. Linear correlation (concordance coefficient, ρc ) and Bland-Altman analyses (mean difference, MD) were performed to evaluate radial R 2 * mapping accuracy compared to Cartesian in a phantom. Radial R 2 * mapping repeatability was characterized using the coefficient of repeatability (CR) between back-to-back scans. The mean and spatial coefficient of variation (CV) of R 2 * was determined for all subjects, and separately for anterior and posterior placentas, at each GA range. ρc was tested for significance. Differences in mean R 2 * and CV were tested using Wilcoxon Signed-Rank and Rank-Sum tests. P < 0.05 was ...Continue Reading

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Citations

Oct 9, 2019·Topics in Magnetic Resonance Imaging : TMRI·Esra Abaci TurkP Ellen Grant
Nov 5, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Xiaodong ZhongHolden H Wu
Aug 28, 2019·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A SørensenP Gowland
Apr 18, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Manuel SchneiderKai Tobias Block
Jul 3, 2020·Journal of Magnetic Resonance Imaging : JMRI·Simon M F TriphanMark O Wielpütz
Sep 17, 2020·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Zungho ZunCatherine Limperopoulos
Aug 25, 2018·Journal of Magnetic Resonance Imaging : JMRI·Tess ArmstrongHolden H Wu
Jan 13, 2021·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Youngwook KeeShreyas S Vasanawala

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