Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were obtained . There is stable mild cardiomegaly . The mediastinal contours are unchanged . No focal consolidation , pleural effusion or pneumothorax . Unchanged appearance of degenerative changes of the right shoulder and thoracic spine .
    OUTPUT:
    
Stable cardiomegaly . Clear lungs .