Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild - to - moderately enlarged . Upper mediastinal contours are stable . Lung volumes are low and there is bibasilar atelectasis , but no focal consolidation , pleural effusion , or pneumothorax . Compression deformity in the mid thoracic spine is similar to prior . Pneumobilia in the right upper quadrant is incidentally noted .
    OUTPUT:
    
Stable cardiomegaly . Low lung volumes with bibasilar atelectasis .