Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . The visualized heart and mediastinum demonstrate moderate cardiomegaly and tortuosity of the thoracic aorta , stable in appearance when compared to prior radiograph dated ___ . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .