Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . Lungs are well expanded without focal consolidation concerning for pneumonia . Slight linear opacities in the right mid lung field are again seen and likely represent fibrosis . There is no pulmonary edema . Post surgical changes are again seen in the left thyroid .
    OUTPUT:
    
No acute cardiothoracic process .