Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lobe opacity has nearly resolved with only a small residual linear opacity remaining adjacent to the periphery of the left hemidiaphragm . Minimal area of linear atelectasis versus scarring is also present at the medial aspect of the right lung base with a similar appearance on older radiograph of ___ . The heart is normal in size , and the aorta is mildly tortuous without change . No pleural effusion or concerning skeletal findings .
    OUTPUT:
    
Near resolution of left lower lobe opacity which may reflect response of clinically diagnosed pneumonia to antibiotic therapy . Small residual focus of atelectasis or scar .