Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The heart size remains mild to moderately enlarged . The aorta is tortuous and calcified . Widening of the superior mediastinum is compatible with known thyroid goiter , as seen on the prior CT . Increased interstitial markings are re- demonstrated , most pronounced at the lung bases , compatible with the patient 's history of chronic interstitial lung disease with superimposed mild interstitial pulmonary edema . More focal opacities within the lung bases could reflect superimposed atelectasis though infection is not completely excluded . No pneumothorax is identified . Is small right pleural effusion may be present . Multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild interstitial pulmonary edema superimposed on a background of chronic interstitial lung disease . More focal patchy opacities in the lung bases likely reflect atelectasis though infection is not completely excluded .