Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is rotated to the left . There is a right basilar opacity . Blunting of the lateral left costophrenic angle could be projectional with rotation . Elsewhere , the lungs are clear . Mild cardiac enlargement is likely accentuated by technique and positioning . Tortuosity of the descending thoracic aorta is noted . No acute osseous abnormalities .
    OUTPUT:
    
Right basilar opacity which could be either infection or atelectasis , to be correlated clinically .