Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The exam is limited by patient 's rotation . Within limitations , there are persistent streaky opacities in the left mid and lower lung zones , which are stable from the prior chest radiograph and CT . This likely represents chronic atelectasis or scarring . Additionally , there is a linear opacity in the right lower lung zone , which is also stable . No new opacity is identified . There is no pulmonary edema , pleural effusion , or pneumothorax . The aorta is tortuous and calcified . The heart size is normal .
    OUTPUT:
    
Stable bibasilar linear opacities , likely representing atelectasis or scarring . No acute cardiopulmonary process .