HRCT features of interstitial pulmonary fibrosis. A. Normal aspect of the lung. B. Mild. C. Moderate. D. Severe. A'. US examination of healthy interlobular septa at lung surface level. Note as the pleura is a linear and regular hyperechoic band (arrow). B'-D'. US examinations showing different scores of fibrotic pulmonary involvement: B'. Mild. C'. Moderate. D'. Severe.
Gutierrez et al. Arthritis Research & Therapy 2011 13:R134 doi:10.1186/ar3446