Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse bilateral opacities , worse at the right lung base . This is likely largely due to pulmonary edema , but underlying pneumonia can not be excluded . There is no pneumothorax . No large pleural effusions . The heart size is within upper limits of normal . No acute osseous abnormalities .
    OUTPUT:
    
Moderate pulmonary edema , but can not exclude right lung base pneumonia .