The Study of Dosimetric Characteristics of the XHA600D Medical Linear Accelerator Based on a Monte Carlo Code

Table 4

Gamma passing rates of off-axis dose curves for different field sizes (cm²) at 10 cm depth in FF mode and FFF mode when the gamma criteria is 1 mm/1% (local dose).

Field size (cm^2)	FF (%)	FFF (%)
4 × 4	100	100
6 × 6	100	100
8 × 8	100	100
10 × 10	100	100
15 × 15	100	100
20 × 20	99.3	100
25 × 25	99.6	97.0
30 × 30	99.4	97.3