Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes bilaterally . Asymmetrical perihilar opacities are re-demonstrated , but is significantly worse on the left side compared to ___ . No large pleural effusions or pneumothorax . The mediastinum and heart are within normal limits . The left PICC line is unchanged in position , with the tip terminating in the low SVC . No acute osseous abnormalities .
    OUTPUT:
    
Asymmetrical perihilar opacities , significantly worse on the left side compared to prior CXR . This most likely represents pulmonary edema , but can not exclude pneumonia in the appropriate clinical setting .