Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are unchanged with the heart size within normal limits . Lung volumes are low with crowding of bronchovascular structures and possible mild pulmonary vascular congestion . No overt pulmonary edema is demonstrated . Patchy right basilar opacity likely reflects an area of atelectasis . There is no focal consolidation , pleural effusion or pneumothorax . Please note that the extreme lung apices are somewhat obscured by the patient 's neck and chin obscuring this region . No acute osseous abnormality is demonstrated .
    OUTPUT:
    
Low lung volumes with probable right basilar atelectasis and possible mild pulmonary vascular congestion .