Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are symmetrically well expanded and well aerated without focal consolidation concerning for pneumonia , pleural effusion or pneumothorax . There is no pulmonary vascular congestion or overt pulmonary edema . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits with mild tortuosity of the thoracic aorta . Partial calcification at the aortic knob is noted . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary process .