Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is borderline enlarged . The central pulmonary vasculature appears mildly congested without pleural effusion or definite septal thickening . No definite focal consolidation is identified . Vague retrocardiac opacity does not have a definite correlate on the lateral image . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No definite acute intrathoracic abnormality .