Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is limited by patient positioning and the patient 's chin and neck obscure evaluation of the medial aspect of the upper lobes . Given these limitations , the heart size remains mildly enlarged . Extensive esophageal varices account for the abnormally widened lower mediastinal contour which appears grossly unchanged . Lung volumes are low . Crowding of bronchovascular structures is demonstrated without overt pulmonary edema . Streaky bibasilar airspace opacities may reflect atelectasis . No focal consolidation , pleural effusion or large pneumothorax is demonstrated . Multiple calcified gallstones are again noted in the right upper quadrant of the abdomen .
    OUTPUT:
    
Limited examination with low lung volumes . Patchy bibasilar airspace opacities may reflect atelectasis .