Esophageal Cancer
Copyright ©The Author(s) 2004.
World J Gastroenterol. Apr 15, 2004; 10(8): 1098-1102
Published online Apr 15, 2004. doi: 10.3748/wjg.v10.i8.1098
Table 1 Beam arrangement of IMRT plans
Number of beamsGantry angles
30o, 120o, 240o
50o, 72 o, 144 o, 216o, 288o
70o, 52 o, 103 o, 154 o, 206 o, 257o, 308o
90o, 40 o, 80 o, 120 o, 160 o, 200 o, 240 o, 280o, 320o
Table 2 Results for CRT and IMRT in five upper esophageal cancer patients(mean±SD)
StuctureParameterCRT3F IMRT5F IMRT7F IMRT9F IMRT
PTV1Mean dose (Gy)73.0 ± 3.074.9 ± 3.874.2 ± 2.373.9 ± 2.074.1 ± 1.5
SD (%)6.3 ± 3.76.7 ± 2.76.0 ± 2.05.7 ± 2.16.0 ± 1.7
D95 (Gy)67.2 ± 0.067.2 ± 0.067.2 ± 0.067.2 ± 0.067.2 ± 0.0
CI0.47 ± 0.160.59 ± 0.180.70 ± 0.040.74 ± 0.060.75 ± 0.07
PTV2Mean dose (Gy)65.3 ± 4.460.0 ± 2.359.3 ± 1.458.4 ± 1.858.4 ± 2.0
SD (%)11.6 ± 3.89.2 ± 1.88.8 ± 1.58.5 ± 1.98.6 ± 1.8
D95 (Gy)52.4 ± 3.351.2 ± 2.850.8 ± 3.450.5 ± 3.351.2 ± 2.9
CI0.52 ± 0.080.46 ± 0.110.64 ± 0.060.67 ± 0.070.68 ± 0.08
LungMean dose (Gy)12.4 ± 1.711.1 ± 1.210.8 ± 1.310.7 ± 1.310.9 ± 1.2
V20 (%)24.7 ± 2.822.1 ± 1.722.4 ± 0.723.2 ± 1.623.8 ± 1.7
V30 (%)18.6 ± 2.915.1 ± 1.615.0 ± 1.913.5 ± 2.213.5 ± 3.2
Spinal cordMaximum dose (Gy)40.9 ± 2.756.9 ± 7.243.9 ± 1.043.3 ± 0.842.0 ± 1.5