Fig. 4

Pre- and post-interventional CMR pulmonary perfusion imaging for assessment of the treatment effect after stenting of a severe ostial left superior pulmonary vein (LSPV) stenosis. Upper row (pre-intervention): Invasive X-ray angiography (A, anterior–posterior projection) and pre-interventional CMR angiography (inlay of A, posterior–anterior projectional view) revealed a ≥ 70% ostial stenosis of the LSPV (white arrow). CMR pulmonary perfusion imaging depicted a perfusion deficit of the left upper lung lobe (B, still frame of original dynamic pulmonary perfusion; C, still frame of dynamic pulmonary perfusion after background stationary tissue subtraction; D, corresponding pseudo-colored parametric map of quantitative CMR pulmonary perfusion analysis with time-to-peak enhancement as the quantitative measure). Bottom row (post-intervention): Invasive X-ray angiography (E, anterior–posterior projection) and post-interventional CMR angiography (inlay of E, posterior–anterior projectional view) after successful angioplasty/stenting of PV stenosis with stent-related signal void (white arrow). On post-interventional CMR pulmonary perfusion imaging at day 1, homogenous perfusion of all lung lobes was observed (F, still frame of original dynamic pulmonary perfusion; G, still frame of dynamic pulmonary perfusion after background stationary tissue subtraction; H, pseudo-colored parametric map of quantitative CMR pulmonary perfusion analysis with time-to-peak enhancement as the quantitative measure; Additional file 2: video file)