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Robust kidney perfusion mapping in pediatric chronic kidney disease using single‐shot 3D‐GRASE ASL with optimized retrospective motion correction
Author(s) -
Nery Fabio,
De Vita Enrico,
Clark Chris A.,
Gordon Isky,
Thomas David L.
Publication year - 2019
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.27614
Subject(s) - kidney disease , medicine , retrospective cohort study , nuclear medicine , repeatability , radiology , mathematics , statistics
Purpose To develop a robust renal arterial spin labeling (ASL) acquisition and processing strategy for mapping renal blood flow (RBF) in a pediatric cohort with severe kidney disease. Methods A single‐shot background‐suppressed 3D gradient and spin‐echo (GRASE) flow‐sensitive alternating inversion recovery (FAIR) ASL acquisition method was used to perform 2 studies. First, an evaluation of the feasibility of single‐shot 3D‐GRASE and retrospective noise reduction methods was performed in healthy volunteers. Second, a pediatric cohort with severe chronic kidney disease underwent single‐shot 3D‐GRASE FAIR ASL and RBF was quantified following several retrospective motion correction pipelines, including image registration and threshold‐free weighted averaging. The effect of motion correction on the fit errors of saturation recovery (SR) images (required for RBF quantification) and on the perfusion‐weighted image (PWI) temporal signal‐to‐noise ratio (tSNR) was evaluated, as well as the intra‐ and inter‐session repeatability of renal longitudinal relaxation time (T 1 ) and RBF. Results The mean cortical and/or functional renal parenchyma RBF in healthy volunteers and CKD patients was 295 ± 97 and 95 ± 47 mL/100 g/min, respectively. Motion‐correction reduced image artefacts in both T 1 and RBF maps, significantly reduced SR fit errors, significantly increased the PWI tSNR and improved the improved the repeatability of T 1 and RBF in the pediatric patient cohort. Conclusion Single‐shot 3D‐GRASE ASL combined with retrospective motion correction enabled repeatable non‐invasive RBF mapping in the first pediatric cohort with severe kidney disease undergoing ASL scans.