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Comparison of the exposure doses and volumes in the healthy tissue. VMAT indicates volumetric modulated arc therapy; IMRT, intensity modulated radiation therapy. V5, V10, V15, V20, V25, V30, V35, V40 and V45 represents the volumes of healthy tissue receiving 5 Gy, 10 Gy, 15 Gy, 20 Gy, 25 Gy, 30 Gy, 35 Gy, 40 Gy and 45Gy, respectively. * represents significant differences (p<0.05).
