Maschke SK, et al. – Researchers intended to assess the utility of 2D–perfusion angiography (2D–PA) in order to quantify perfusion changes of the lung parenchyma pre– and post–balloon pulmonary angioplasty (BPA). The results of this study showed that quantification of pulmonary perfusion pre– and post–BPA applying 2D–PA is feasible and has the potential to improve monitoring of balloon pulmonary angioplasty.