Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was obtained . Lungs are somewhat low in volume with resultant bronchovascular crowding . Within this limitation , there may be mild pulmonary edema . Cardiac size remains stably enlarged . No pneumothorax or pleural effusion is identified .
    OUTPUT:
    
Perhaps mild pulmonary edema with assessment limited by low lung volumes .