Imaging of interstitial lung disease.

This article provides a comprehensive summary of typical imaging features of common interstitial lung diseases with an emphasis on high-resolution computed tomography (HRCT). The classification of interstitial lung disease that is used is in accordance with the consensus statement of the American Thoracic Society. The secondary pulmonary lobule is the basic anatomic unit that is used for standard description of findings on HRCT. Sarcoidosis, Langerhans' cell histiocytosis, lymphangioleiomyomatosis, collagen vascular diseases, and hypersensitivity pneumonitis are some of the common interstitial lung diseases that are addressed.