Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains mildly enlarged . The mediastinal contour is unchanged with mild unfolding of the thoracic aorta noted . There is no pulmonary vascular congestion . Hilar contours are stable . Again demonstrated are predominantly peripheral and basilar linear and interstitial opacities with a more focal opacity in the left lung base . No pleural effusion or pneumothorax is identified . There is no pulmonary vascular congestion . No acute osseous abnormalities are detected .
    OUTPUT:
    
Findings compatible with a chronic interstitial lung disease , not significantly changed from prior .