Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal . Lungs are clear . There are possible very small pleural effusions bilaterally . A large amount of free intraperitoneal air is evident and is likely explained by the patient 's recent surgery one day earlier .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Large amount of free intraperitoneal air , likely due to recent pelvic surgery . Clinical correlation suggested .