b) correlation with functional MRI outcomes
Functional MRI data were acquired using matrix pencil decomposition MRI as previously described 18. Main outcomes are fractional ventilation defect percentage (VDP) and relative perfusion defect percentage (QDP) expressed as the impaired fraction relative to whole lung volume. VDP and QDP were recalculated due to updated post-processing 19. Correlations between VDP or QDP and LCI were assessed by Spearman’s rank correlation20.