Figure 3.

Imaging and pathology from case 2. A, Representative axial computed tomography image of the lungs demonstrating no significant abnormalities near the bases. Mild upper lobe emphysema was noted on other images (not shown). B, ¹²⁹Xe magnetic resonance imaging of ventilation demonstrating mild peripheral ventilation defects and mild upper lobe emphysema. C, ¹²⁹Xe spectroscopy exhibiting a moderate decrease in xenon signal in red blood cells (RBCs) relative to barrier tissue (left) and single-breath gas exchange images demonstrating homogeneous gas and barrier signal while xenon uptake in RBCs contained severe focal abnormalities (right). D, Pathology demonstrating pulmonary hypertensive arteriopathy.