Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated , and no focal opacities are noted . The cardiomediastinal and hilar contours are unremarkable . There is no evidence of pneumothorax . In the lateral view , there is blunting of the left costophrenic angle which is stable since ___ .
    OUTPUT:
    
No evidence of acute intrathoracic process .