Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly enlarged without vascular congestion or edema . Mediastinal silhouette and hilar contours are unremarkable . Lungs are clear without focal consolidation worrisome for pneumonia . There is no pleural effusion or pneumothorax . A left humeral head replacement is incompletely imaged .
    OUTPUT:
    
No acute cardiopulmonary process .