Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Right - sided Port - A - Cath tip terminates at the junction of the SVC and right atrium . Heart size is mildly enlarged , accentuated by low lung volumes . Mediastinal and hilar contours are unremarkable . There is crowding of bronchovascular structures without pulmonary edema . Patchy opacities in the lung bases likely reflect areas of atelectasis . Infection , however , can not be excluded in the correct clinical setting . No pleural effusion or pneumothorax is demonstrated .
    OUTPUT:
    
Low lung volumes with bibasilar airspace opacities , likely atelectasis . Infection , however , can not be excluded in the correct clinical setting .