Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There increased interstitial markings in the lungs bilaterally similar to prior . There is some more confluent left basilar opacity projecting posteriorly on the lateral view . There is no large pleural effusion . Cardiomediastinal silhouette is grossly unchanged . Aortic core valve device and median sternotomy wires are unremarkable .
    OUTPUT:
    
Interstitial edema . Slightly increased opacity at the left lung base which could be superimposed infection versus atelectasis , to be correlated clinically .