Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation of pulmonary detail is somewhat limited , particularly on the AP view , by soft tissue attenuation . The lung volumes are low . The heart is mild to moderately enlarged . The mediastinal and hilar contours are unremarkable . The lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes are present along the thoracic spine .
    OUTPUT:
    
Cardiomegaly . No evidence of acute disease .