Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Increased interstitial markings bilaterally in areas of the chest most likely relates to underlying chronic lung disease , COPD . No definite new focal consolidation is seen . There is slight blunting of the costophrenic angles likely due to hyperinflated lungs , similar to prior without large pleural effusion seen . There is no evidence of pneumothorax . The cardiac silhouette is top normal . The aorta is calcified and tortuous . Mild prominence in the region of the main pulmonary artery / AP window is similar as compared to ___ .
    OUTPUT:
    
Chronic lung disease . Likely left basilar atelectasis , although an early infectious process is not excluded in the appropriate clinical setting .