Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates at the junction of the SVC and right atrium . The heart size is normal . The mediastinal and hilar contours are unremarkable . There are minimal atherosclerotic calcifications of the aortic arch . The pulmonary vasculature is normal . Lung volumes are low . There is mild bibasilar atelectasis , but no focal consolidation . No pleural effusion or pneumothorax is present . There are moderate multilevel degenerative changes in the thoracic spine . Oral contrast is noted within the colon .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .