Progress in Medical Physics

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Table. 3.

Table. 3.

The local gamma passing rates of the various passing criteria for various head and neck tumors measured

Treatment site Passing criterion Local gamma passing rates (%) P-value

80 and 140 kVp 120 and 140 kVp
H&N tumor
Across the maxillary sinus 2%/2 mm 98.50±2.21 99.94±0.78 0.022
1%/1 mm 88.69±13.31 98.96±1.56 0.019
0.5%/0.5 mm 65.60±18.28 90.63±9.35 <0.001
Across the mandible 2%/2 mm 97.59±2.48 99.38±1.40 0.018
1%/1 mm 89.15±9.41 97.94±2.06 0.001
0.5%/0.5 mm 69.85±17.69 89.05±7.48 <0.001
Across the C7 spinal segment 2%/2 mm 99.39±1.01 100.00±0.00 0.022
1%/1 mm 92.21±13.38 99.85±0.41 0.030
0.5%/0.5 mm 80.98±23.87 95.50±9.22 0.031

Values are presented as mean±standard deviation.

Progress in Medical Physics 2021;32:59-69 https://doi.org/10.14316/pmp.2021.32.3.59
© 2021 Progress in Medical Physics