Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and pulmonary vasculature are unremarkable . Again noted are diffusely increased interstitial markings , improved since the prior examination . There is no large pleural effusion or pneumothorax . A vague left basilar opacity is noted , which could represent atelectasis or in the appropriate clinical context , pneumonia . There is mild biapical pleural thickening
    OUTPUT:
    
1 . Left basilar opacity , atelectasis or pneumonia in the appropriate clinical context 2 . Minimal interstitial abnormality likely represent interstitial edema