Progress in Medical Physics

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