Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates mild linear atelectasis and associated volume loss in the left lower lung base . No focal opacifications concerning for pneumonia identified . Stable blunting noted of the left costophrenic angle is likely due to pleural thickening and scarring . No definite pleural effusions evident . Interval development of a fracture of the most inferior sternotomy suture .
    OUTPUT:
    
No acute process . Interval development sternotomy suture fracture without evidence of dehiscence .