Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pleural parenchymal scarring is present at the lung apices . There is patchy bibasilar atelectasis , without focal consolidation . Heart size is normal . The aorta is mildly tortuous . No pleural effusions or pneumothorax . Mild degenerative changes in the bilateral acromioclavicular joints .
    OUTPUT:
    
Bibasilar atelectasis . Otherwise , no acute intrathoracic process .