1. Comparison of 3D UTE free‐breathing lung MRI with hyperpolarized 129Xe MRI in pediatric cystic fibrosis.
- Author
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Munidasa, Samal, Zanette, Brandon, Dumas, Marie‐Pier, Wee, Wallace, Braganza, Sharon, Li, Daniel, Ratjen, Felix, and Santyr, Giles
- Subjects
MULTIVARIATE analysis ,PULMONARY function tests ,CYSTIC fibrosis ,LUNG diseases ,MULTIPLE comparisons (Statistics) - Abstract
Purpose: To compare phase‐resolved functional lung (PREFUL) regional ventilation derived from a free breathing 3D UTE radial MRI acquisition to hyperpolarized 129Xe‐MRI (Xe‐MRI), conventional 2D multi‐slice PREFUL MRI, and pulmonary function tests in pediatric cystic fibrosis (CF) lung disease. Methods: Free‐breathing 3D UTE and 2D multi‐slice 1H MRI as well as Xe‐MRI were acquired in 12 stable pediatric CF patients. Using PREFUL, regional ventilation (RVent) maps were calculated from the free‐breathing data. Ventilation defect percentage (VDP) was determined from 3D and 2D RVent maps (2D VDPRVent and 3D VDPRVent, respectively) and Xe‐MRI ventilation (VDPXe). VDP was calculated for the whole lung and for eight regions based on left/right, anterior/posterior, and superior/inferior divisions of the lung. Global and regional VDP was compared between the three methods using Bland–Altman analysis, linear mixed model‐based correlation, and one‐way analysis of variance and multiple comparisons tests. Results: Global 3D VDPRVent, VDPXe, and 2D VDPRVent were all strongly correlated (all R2 > 0.62, p < 0.0001) and showed minimal, non‐significant bias (all <2%, p > 0.05). Three dimensional and 2D VDPRVent significantly correlated to VDPXe in most of the separate lung regions (R2 = 0.18–0.74, p < 0.04), but showed lower inter‐agreement. The superior/anterior lung regions showed the least agreement between all three methods (all p > 0.12). Conclusion: Absolute VDP assessed by 3D UTE PREFUL MRI showed good global agreement with Xe‐MRI and 2D multi‐slice PREFUL MRI in pediatric CF lung disease. Therefore, 3D UTE PREFUL MRI offers a sensitive and potentially more accessible alternative to Xe‐MRI for regional volumetric evaluation of ventilation. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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