Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart size is likely top normal , unchanged . Aorta is tortuous and demonstrates diffuse atherosclerotic calcifications . Mediastinal and hilar contours are otherwise stable . There is no pulmonary edema . Elevation of the left hemidiaphragm is chronic . Left lower lobe atelectasis is re - demonstrated . No large pleural effusion or pneumothorax is present . There are mild to moderate multilevel degenerative changes noted in the imaged thoracolumbar spine with a mild compression deformity of the T12 vertebral body , unchanged from ___ .
    OUTPUT:
    
Low lung volumes with left lower lobe atelectasis . No definite radiographic evidence for pneumonia .