A characteristic evaluation of transparent detector

抄録

In this study, we considered the precision and characteristics of the transparent detector. Bottom of the many non-invasive type instruments detector is covered by a lead, measurements do not include X-ray scattering. Recently, transparent detector have been developed as a non-invasive type instruments Xi（ Raysafes） option, can be performed dose evalutaion that includes X-ray scattering. We used X-ray equipment, conducting in-air, above- Poly methyl methacrylate（ PMMA） phantom, internal-PMMA phantom and Auto Exposure Control（ AEC） receptor internal measurements for transparent detector :TD, ionization chamber（ 9015） and non-invasive type instruments（ R/F）. For air kerma measured by the TD, The TD has an upper dose limit, but error of the TD between the 9015 and the R/F was within ±3％ , showing good correlation with each device.For above-PMMA dose measured by the TD, there was a trend towards larger error for lower tube voltage, but error was within ±5％ when above 70 kV. For internal-PMMA and internal-AEC receptor dose measured by the TD, when compared to dose of the R/F, it was possible to include X-ray scattering in dose evaluation. As the TD is transparent type, there is little effect during AEC operation on dose volume, and entrance surface dose（ ESD） inclusive of X-ray scattering is possible. This should be effective for X-ray equipment quality control.