Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Of note , in the lateral view , there is blunting of the posterior costophrenic angle , unchanged from prior , likely scarring .
    OUTPUT:
    
No acute intrathoracic process .