Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bilateral parenchymal opacities with an upper lung distribution . The cardiac silhouette is mildly enlarged , similar compared to prior . Atherosclerotic calcifications noted at the aortic arch . There are trace bilateral effusions . No acute osseous abnormalities identified , hypertrophic changes noted in the spine .
    OUTPUT:
    
Bilateral parenchymal opacities which could be seen in the setting of bilateral infection or potentially edema . Small bilateral effusions .