Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart remains moderately enlarged with left ventricular predominance . The mediastinal and hilar contours are unchanged , with tortuosity of the thoracic aorta again noted . Diffuse atherosclerotic calcification of the aorta is re - demonstrated . There are low lung volumes . The pulmonary vascularity is not engorged . Large hiatal hernia is again demonstrated . Streaky opacities in the lung bases , including a somewhat more ovoid appearing opacity in the left lung base , likely reflect atelectasis . No pneumothorax is detected . Degenerative changes of both acromioclavicular joints are noted . Compression deformity of the T12 vertebral body is unchanged compared to the prior CT from ___ .
    OUTPUT:
    
Large hiatal hernia with bibasilar atelectasis .