Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded , without focal parenchymal opacity to suggest pneumonia . Healed fractures of the anterior left third and fifth ribs are redemonstrated . A focal opacity projecting over the left mid lung anteriorly is compatible with radiation changes seen on prior chest CT . The cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .