Interfacing a linear diode array to a conventional water scanner for the measurement of dynamic dose distributions and comparison with a linear ion chamber array.
A linear diode array was interfaced to a conventional water scanner for the measurement of dose distribution of dynamically wedged treatment fields. The system was validated by comparing the dose distribution of an open field measured with the system and with a scanning ionization chamber. The system was also compared with a commercial ion chamber array scanner for the measurement of dose distributions of dynamic wedges. The dose distributions of enhanced dynamic wedge fields measured with the two dosimetry systems agree well beyond the depth of maximum dose. However, in the buildup region, the measurements made with the linear diode array system differ by more than 10% from that of the ion chamber array scanner.
Sidhu
N P
NP
Department of Medical Physics, Tom Baker Cancer Center, Calgary, AB, Canada.
D008961:Models, Structural; D011874:Radiometry / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D013679:Technology, Radiologic