Improved Method for the Translational Technique to Treatment of Whole Skin in Cancer Patients

There are several techniques for the treatment of whole skins in the standing position of patient, in spite of some patients can not able to stand. In addition, most of these techniques require a large treatment rooms, but there is no problem in translational technique. In this study we try to design transfer technique for treating skin on the linear accelerator in Ahvaz Golestan hospital. Subjects and Measurements were made at radiation oncology department of Ahvaz Golestan hospital by Varian linear accelerator with 10×10 cm2 applicator, using a parallel plate dosimeter and water phantom with dimensions 20 × 30 × 30 cm3 at 4 and 6 Mev energies. Water phantom moves in front of electron sources to get a steady dose by all points at Zref depth. We could obtain a couch rate of displacement under the applicator. Dosimetry results showed that if the couch moves symmetricallyas mach as equal to twice the length of the applicator plus the length of the phantom, all the points at any depth will get nearly a uniform dose. The results revealed that the technique a good one to deliver a uniform dose to all points of the phantom at Zref.