Chest DR image of a pediatric participant in the standing PAP group (unit A).The image shown is that of a 43-month-old male with a height of 104 cm, a weight of 15 kg, and a BMI of 13.87 kg/m2. The ESD value was 0.05 mGy, the DAP value was 0.13 dGy•cm2, the VGAS was 30, the right LFA was 76.57 cm2, the left LFA was 65.20 cm2, the total LFA was 141.77 cm2, and the LD was 12.36 cm.