Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Lung volumes are low with chronic interstitial opacities and bronchiectasis at the lung bases and periphery bilaterally , similar to prior . Increased patchy opacities in the lung bases compared to the previous radiograph may reflect superimposed atelectasis . Chronic blunting of the right costophrenic angle suggests chronic pleural thickening . No focal consolidation , pleural effusion or pneumothorax is present . There are moderate degenerative changes in the thoracic spine .
    OUTPUT:
    
Chronic fibrosing interstitial lung disease , similar to the previous study . Patchy opacities in lung bases may reflect superimposed atelectasis .