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Table 1 The volume of targets and OARs for fourteen patients. (Unit:cc)

From: Improve the dosimetric outcome in bilateral head and neck cancer (HNC) treatment using spot-scanning proton arc (SPArc) therapy: a feasibility study

NO.CTV highCTV low/medianIpsilateral ParotidContralateral ParotidCordBrain StemOral Cavity
1141.7204.538.839.416.312.974.6
2418.2202.423.912.718.724.681.5
392.8172.119.812.716.029.2190.3
4173.7400.553.157.012.819.8136.3
5234.2240.729.830.533.230.6109.0
6127.9283.443.041.28.97.955.7
7106.7119.320.123.625.97.161.4
8124.3324.043.741.814.220.8127.2
9174.2394.220.227.649.336.752.0
10238.6200.830.235.719.128.044.7
1165.7374.622.426.817.028.995.7
12100.8286.833.831.729.719.459.7
1397.6166.732.239.630.115.349.2
1458.0225.318.918.231.613.835.3
Average153.9256.830.731.323.121.183.7
Standard Deviation94.089.410.712.310.89.043.7