Development and evaluation of a monoxide-based flexible skin dosimeter for radiotherapy at photon energies

Abstract

Radiation therapy uses high-energy radiation that can cause various side effects depending on the patient's exposure. In particular, side effects occur in the skin due to its radiation exposure to reach the target volume. Therefore, side effects are reduced by clinical trials using various skin dosimeters such as lms and glass detectors to determine the dose exposed to the skin. However, accurately measuring the doses using these dosimeters is challenging due to human curvature. In this study, a exible skin dosimeter was produced using the photoconductor materials mercury oxide (HgO) and lead oxide (PbO).The performance of the proposed dosimeter was evaluated by measuring reproducibility, linearity, dose rate independency according to dose, and percent depth dose (PDD) at photon energy beam. The results showed that the exible skin dosimeter using HgO material has high applicability as a skin dosimeter due to its stability compared to PbO. The results provide useful insights for the radiation therapy eld, particularly in areas where radiation measurement is di cult, depending on the human curvature. The proposed exible skin dosimeter could serve in various radiation detection areas as a exible, functional material

An investigation on quantitative detector characteristics of novel flexible skin dosimeter using Monte Carlo simulation method

“…This simulation study was carried out via open source pyPENELOPE Monte Carlo code. As reported in [8] and relevant works in [24,25], the first layer was a 1 micrometre (µm) thick gold electrode, the second layer was a 10 μm-thick passive layer of C-type perylene, the third layer was 50 μm-thick irradiation sensing layers of PbO, the fourth layer was 0.5 μm-thick indium tin oxide, and the last base layer was 100 μm-thick polyester substrates. These structures were designed by using the user-friendly interface of the pyPENELOPE software.…”

Laser-Etched Array-Patterned Lead Oxide Polycrystalline Thin Film for Direct Conversion Flexible X-ray Detector Application

“…O. Semeniuk also showed the X-ray photoelectric conversion and response characteristics of polycrystalline and amorphous PbO films in detail. , Sanghee Nam reported a kind of flexible X-ray detector based on PbO photoconductive layers using the particle in binder method and screen printing method, which showed mechanically uncrushable and stable properties as well as yielded results close to a commercialized silicon diode . Moreover, Jin-Young Kim also reported a flexible skin dosimeter based on lead oxide silicone binder by using the particle in binder method for radiation therapy and evaluated the performance at 6 and 10 MV photon energy . As far as we know, a flexible X-ray detector based on a pure PbO thin film (polycrystalline or amorphous) has not yet been reported.…”

“…26 Moreover, Jin-Young Kim also reported a flexible skin dosimeter based on lead oxide silicone binder by using the particle in binder method for radiation therapy and evaluated the performance at 6 and 10 MV photon energy. 27 As far as we know, a flexible X-ray detector based on a pure PbO thin film (polycrystalline or amorphous) has not yet been reported.…”