Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Lung volumes are slightly low , though accounting for this , there is diffuse interstitial prominence which could reflect known sarcoidosis . An element of superimposed interstitial edema is difficult to exclude . The heart is top normal in size . No pleural effusion or pneumothorax . No focal consolidation . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly , unchanged . Diffuse interstitial opacity which could reflect known sarcoidosis , though a component of superimposed edema difficult to exclude . Please correlate clinically .