Progress in Medical Physics

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Table. 5.

Table. 5.

The low-dose spillage analysis for supraglottic larynx, hard palate, and tongue cancers using the IMRT and VMAT techniques

Parameter Supraglottic larynx Hard palate Tongue



IMRT VMAT P-value IMRT VMAT P-value IMRT VMAT P-value
D1% (Gy) 40.67±10.24 40.39±11.58 0.807 40.32±12.14 41.30±12.26 0.316 40.62±11.75 39.42±12.62 0.005
D2% (Gy) 27.34±5.07 27.6±6.76 0.760 28.67±6.48 28.71±7.64 0.973 26.33±7.66 24.91±8.11 0.006
D5% (Gy) 19.31±5.38 17.68±5.20 0.062 20.07±6.84 17.35±6.83 0.010 15.68±4.57 13.40±3.99 0.000
V1Gy (cc) 7,993.9±2,173.1 8,046.7±2,177.0 0.212 6,015.3±3,032.3 5,979.8±2,958.5 0.382 6,442.9±1,306.5 6,515.3±1,322.5 0.070
V2Gy (cc) 5,553.7±1,792.1 5,559.5±1,763.0 0.871 4,260.9±2,294.6 4,218.6±2,228.5 0.515 4,369.8±1,065.0 4,349.3±1,058.7 0.515
V3Gy (cc) 4,597.8±1,681.4 4,531.9±1,602.1 0.166 3,552.1±2,016.3 3,453.6±1,907.7 0.168 3,559.2±1,029.5 3,423.7±1,011.1 0.000
V4Gy (cc) 4,013.3±1,615.0 3,925.9±1,514.7 0.091 3,095.2±1,835.6 2,972.5±1,733.1 0.060 3,023.7±1,020.1 2,875.77±994.1 0.000
V5Gy (cc) 3,572.8±1,520.6 3,466.8±1,402.1 0.069 2,761.0±1,673.7 2,629.2±1,622.1 0.027 2,616.1±990.7 2,500.3±969.8 0.001
V10Gy (cc) 2,309.1±1,194.3 2,049.5±1,081.0 0.007 1,822.7±1,230.6 1,482.8±1,058.9 0.003 1,609.47±791.1 1,320.3±595.2 0.000
V15Gy (cc) 1,703.2±981.4 1,205.5±692.7 0.000 1,326.5±904.4 844.7±568.8 0.010 1,082.2±591.2 712.3±304.2 0.000
V20Gy (cc) 975.6±511.3 747.6±414.2 0.002 830.7±547.2 542.2±323.87 0.024 578.58±298.1 452.1±198.5 0.002
V25Gy (cc) 518.8±234.0 498.1±254.7 0.570 450.4±262.3 359.2±179.1 0.085 348.2±148.8 313.4±149.7 0.028
V30Gy (cc) 294.1±90.1 332.36±153.6 0.165 252.28±134.5 243.0±100.1 0.719 245.0±104.2 232.8±123.1 0.225

Values are presented as mean±standard deviation.

IMRT, intensity-modulated radiation therapy; VMAT, volumetric modulated arc therapy.

Progress in Medical Physics 2021;32:70-81 https://doi.org/10.14316/pmp.2021.32.3.70
© 2021 Progress in Medical Physics