Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are again noted . Superimposed on atelectasis and bronchovascular crowding are diffuse bilateral parenchymal opacities throughout the lungs which given differences in technique have not significantly changed since yesterday 's exam . The cardiomediastinal silhouette is grossly within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bilateral parenchymal opacities which could be seen in the setting of pneumonia , potentially atypical , versus edema .