Fig. 5From: MRI of the lung (2/3). Why … when … how?Lung MRI of a 37-year-old male patient with cystic fibrosis. Coronal T2-weighted, respiration triggered and transverse breath-hold T1-weighted 3D GRE images show peripheral airways with enhanced signal due to mucus plugging. Note the “tree-in-bud” sign similar to the typical appearance on CT (dashed circles)Back to article page