Semiautomatic Segmentation of Ventilated Airspaces in Healthy and Asthmatic Subjects Using Hyperpolarized MRI
Segmented lung volumes for a healthy and an asthmatic subject. Panels (a) and (c) show a slice of the HP 3He MRI for a healthy and an asthmatic subject, respectively. The corresponding segmented images are divided into clusters of high, intermediate, and low ventilation as shown in panels (b) and (d). Note the increased predominance in pockets of hypointense areas indicating low ventilation in the asthmatic subject as compared to the healthy subject.