Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The patient is status post median sternotomy and CABG . Right - sided Port - A - Cath tip terminates in the upper SVC . Heart size is top normal . The mediastinal and hilar contours are unremarkable with mild aortic knob calcifications re - demonstrated . There is crowding of the bronchovascular structures but no overt pulmonary edema is present . Mild bibasilar streaky opacities likely reflect atelectasis . No pleural effusion or pneumothorax is identified . Cholecystectomy clips are noted in the right upper quadrant of the abdomen .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis . No evidence of congestive heart failure .