Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation , effusion , or edema . Retrocardiac linear opacity is likely due to scar given persistence since ___ . Moderate enlargement of cardiac silhouette appears to have progressed since ___ . There is persistent tortuosity descending thoracic aorta . No acute osseous abnormalities .
    OUTPUT:
    
Cardiomegaly likely progressed since ___ . No acute cardiopulmonary process .