Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is stable since the prior exam . There is been prior aortic valve replacement with median sternotomy . The median sternotomy wires are well aligned and intact . There are persistent reticular diffuse opacities . This similar to the prior examination . No definite pleural effusion or pneumothorax is identified . No focal consolidation is seen .
    OUTPUT:
    
Persistent bilateral reticular opacities , in the absence of pleural effusions and cardiomegaly , is less likely to represent edema . Other considerations include an acute viral infection or interstitial lung disease . Follow - up CT on a non-emergent basis is recommended for further evaluation .