Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is borderline enlarged . Aortic knob calcifications are demonstrated . The mediastinal and hilar contours are within normal limits . Crowding of bronchovascular structures is demonstrated without overt pulmonary edema . Streaky bibasilar atelectasis is noted without focal consolidation . No pleural effusion or pneumothorax is present . Mild degenerative changes are noted in the thoracic spine . Fixation hardware within the left proximal humerus is incompletely imaged . Osseous structures are diffusely demineralized .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .