Izvorni znanstveni članak
Model of Total Skin Electron Treatment Using the 'Six-Dual–Field' Technique
Dario Faj
Mladen Vrtar
Zdenko Krajina
Slaven Jurković
Damir Margaretić
Sažetak
During implementation of the total skin electron treatment, using six-dual-field technique,
at radiotherapy department a large number of measurements are needed. To assess
depth dose curve required by clinicians and dose uniformity over a whole treatment
plane, combinations of different irradiation parameters are used (electron energy, beam
angle, scatterers). Measurements for each combination must be performed. One possible
way to reduce number of measurements is to model the treatment using the Monte Carlo
simulation of electron transport. We made a simplified multiple-source Monte Carlo
model of electron beam and tested it by comparing calculations and experimental results.
Calculated data differs less than 5 percent from measurements in the treatment
plane. During the treatment patient can be approximated using cylinders with different
diameters and orientations. We tried to model the depth dose variations in the total skin
electron treatment not just around the body cross-section (simplified to cylinders of different
diameters), but also along the body to account for the variations in body curvature
longitudinally. This effect comes down to the problem of modeling distribution in
different cylinders, but varying the longitudinal orientation of those cylinders. We compared
Monte Carlo calculations and film measurements of depth dose curves for two orientations
of the cylindrical phantom, which were the simplest for experimental arrangement.
Comparison of the results proved accuracy of the model and we used it to calculate
depth dose curves for a number of other cylinder orientations.
Ključne riječi
radiotherapy; mycosis fungoides; skin; electron; model
Hrčak ID:
28163
URI
Datum izdavanja:
15.12.2003.
Posjeta: 1.202 *