Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrates clear lungs with no focal opacity convincing for pneumonia . When compared to prior radiograph dating back through ___ , the cardiomediastinal silhouette appears unchanged . The aorta is tortuous in its course . There is no large pleural effusion . No acute intrathoracic abnormalities identified .
    OUTPUT:
    
No radiographic evidence of acute cardiopulmonary abnormality .