Figure 4

Site of dose measurement are hand, foot, thyroid, eyeball and kidney. First, the hand was placed 10 cm from the collimation edge to the center. Second, the foot was placed 60 cm below the table from the collimation edge to the center. Third, the thyroid was placed 50 cm above the table from the collimation edge to the center. Fourth, the eyeball was placed 60 cm from the collimation edge to the center. Fifth, the external scatter ion chamber was placed 40 cm behind the apron from the collimation edge to the center while wearing the apron because the kidney was placed behind the back.