Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is streaky left basilar opacity . Blunting of the left lateral costophrenic angle could represent small effusion . The right lung is grossly clear noting that the apex is obscured due to patient 's facial / chin . There is no pulmonary edema . The cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications are noted in the thoracic aorta . No acute osseous abnormalities .
    OUTPUT:
    
Possible small left pleural effusion . Left basilar opacity which could be due to atelectasis although underlying infection is not excluded . No pulmonary edema .