Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , accentuating enlarged cardiac silhouette . The mediastinal and hilar contours are within normal limits . The lungs are clear . There is no pneumothorax , pulmonary edema , or large effusion . Median sternotomy wires are in place and post-CABG changes are noted . There is spondylosis in the mid thoracic spine .
    OUTPUT:
    
No evidence of pneumonia . Stable cardiomegaly .