Progress in Medical Physics

Table. 2.

Table. 2.

Differences between the measured and calculated Sc values for jaw-defined field sizes

Field Jaw-defined field size (X×Y cm2) Mean (%) Maximum (%)
Square field 4×4 to 40×40 0.050 0.114
Rectangular field 10×4 to 10×40 0.036 0.099
4×10 to 40×10 0.025 0.075
4×4 to 4×40 0.130 0.212
4×4 to 40×4 0.116 0.164
40×4 to 40×40 0.065 0.112
4×40 to 40×40 0.055 0.154

Sc, head scatter factor.

Progress in Medical Physics 2021;32:137-44 https://doi.org/10.14316/pmp.2021.32.4.137
© 2021 Progress in Medical Physics