Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A rounded opacity is again seen at the right lung base , concerning for bronchogenic carcinoma , but better characterized on the prior CT . The lungs are overinflated . There is no pleural effusion or pneumothorax . The aorta is tortuous , otherwise , mediastinal contours are normal . The cardiac silhouette is normal in size . Retained enteric contrast is seen beneath the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .