Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lungs are clear . Pulmonary vasculature is normal . Heart is mildly enlarged . Descending aorta is mildly tortuous . Hilar contours normal . There are no pleural effusions . Old left - sided rib fractures are again seen .
    OUTPUT:
    
No acute intrathoracic process .