Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion . There is widening of the right acromio-clavicular joint since the prior study from ___ , which may represent old trauma or resoprtion . A left lower zone punctate calcification is unchanged .
    OUTPUT:
    
No acute intrathoracic process .