Reticular Pattern

The reticular appearance refers to a collection of innumerable small linear opacities that together produce an appearance resembling a “net”. The pattern can be fine, medium or coarse. Fine and medium patterns are shown here. Reticular patterns represent...

Peribronchial Cuffing

Peribronchial cuffing (arrow) occurs when interstitial fluid accumulates around a bronchus. Peribronchial cuffing is present if the bronchial wall is thicker than the tracing of a well-sharpened pencil. [Courtesy of Dr. N. Jaffer]

Kerley B Lines

Kerley B lines represent thickened connective tissue planes, for example due to edema of the septal lines of secondary lobules. They are most commonly due to pulmonary edema or lymphangitic carcinomatosis. Kerley B lines are horizontal, <2 cm long and 1 mm thick,...

Idiopathic Pulmonary Fibrosis

The left image (a) shows mildly reduced lung volumes, hazy opacifications and reticulation, primarily in the lower lobes. The right image (b), taken about 9 months later, shows progression of the reticulation, volume loss and some nodularity. [Courtesy of Dr. Ted...