Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild enlargement of cardiac silhouette which is unchanged . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . Apart from a linear opacity in the right lung base which is compatible with subsegmental atelectasis , the lungs are clear . No pleural effusion , focal consolidation or pneumothorax is visualized . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary process .