Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the right infrahilar region , there is a opacity which is concerning for infectious process . Bibasilar platelike atelectasis is noted . Lungs are otherwise clear . Heart size , hilar and mediastinal contours are normal . No pleural abnormality is seen . The aortic arch is dilated and non emergent CT to evaluate for thoracic aortic aneurysm could be considered .
    OUTPUT:
    
Right infrahilar opacity is concerning for an infectious process or aspiration .