Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Diffusely increased interstitial markings are consistent with mild interstitial edema . Small opacity at the left lung base is likely atelectasis . There is no pneumothorax or pleural effusion . Cardiomediastinal silhouette is normal size . Tortuous aortic contour is noted .
    OUTPUT:
    
Mild interstitial edema . Small opacity at the left lung base is likely atelectasis .