Fig 1.
Diagram of the geometric experimental setup for percentage depth ionization.
(a) Water phantom and (b) water-equivalent plastic phantom.
Table 1.
Measurement conditions.
Fig 2.
Experimental setup for radiochromic film calibration.
Table 2.
Measurement conditions.
Fig 3.
Diagram of the geometric experimental setup for percentage depth dose.
Fig 4.
Percentage depth ionization as a function of density thickness.
The plastic density (ρpl) is calibrated to the physical thickness of the SP34 slab phantom to determine the density thickness.
Fig 5.
Percentage depth ionization as a function of water-equivalent thickness.
The depth scaling factor (cpl) is calibrated to the density thickness of the SP34 slab phantom to determine the water-equivalent thickness.
Table 3.
Parameters related to cpl in PDI curves measured at various electron energies.
Fig 6.
Calculated fluence scaling factor from ionometric measurement at the reference depth.
Table 4.
Measurement depth for determining the fluence scaling factor.
Fig 7.
Percentage depth dose as a function of water-equivalent thickness using the ionization chamber.
Table 5.
Parameters associated with electron beam characteristics in PDD curves measured at various electron energies.
Fig 8.
Percentage depth dose as a function of water-equivalent thickness using film dosimetry.
Table 6.
Parameters related to electron beam characteristics in the PDD curves measured at various electron energies.