Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . The heart is mildly enlarged . There is no pneumothorax or pleural effusion . Coarse interstitial markings are stable from prior . Atherosclerotic calcification along the aortic knob noted . Bony structures appear intact .
    OUTPUT:
    
No acute traumatic injury .