USE OF ULTRAVIOLET RAY PRE-IRRADIATION TO IMPROVE THE ACCURACY OF LOW-DOSE MEASUREMENTS OF THE CT USING A GAFCHROMIC RTQA2 FILM

Abstract The purpose of this study is to develop a method for use at extremely low-dose ranges and to decrease the uncertainty outside the recommended range of Gafchromic RTQA2 (RTQA2). By this method, the CT dose including the scattered radiation region can be grasped. The base density was increase...

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Veröffentlicht in:Radiation protection dosimetry 2021-06, Vol.195 (1), p.61-68
Hauptverfasser: Katsuda, Toshizo, Gotanda, Rumi, Gotanda, Tatsuhiro, Tanki, Nobuyoshi, Kuwano, Tadao, Yabunaka, Kouichi
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container_issue 1
container_start_page 61
container_title Radiation protection dosimetry
container_volume 195
creator Katsuda, Toshizo
Gotanda, Rumi
Gotanda, Tatsuhiro
Tanki, Nobuyoshi
Kuwano, Tadao
Yabunaka, Kouichi
description Abstract The purpose of this study is to develop a method for use at extremely low-dose ranges and to decrease the uncertainty outside the recommended range of Gafchromic RTQA2 (RTQA2). By this method, the CT dose including the scattered radiation region can be grasped. The base density was increased by ultraviolet (UV)-ray preirradiation. RTQA2 was irradiated with UV-A rays for 26 and 40 h. Subsequently, RTQA2 was exposed to 2, 4, 6, 8, 10, 25, 50, 75, 100, 150, 200 and 250 mGy X-rays using a segmentation method. Calibration curves with and without UV-A irradiation were compared. The calibration curve with 40-h UV-A ray irradiation was the most linear, and a steeper slope area was not observed. The uncertainty in the calibration curve was reduced (p 
doi_str_mv 10.1093/rpd/ncab115
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title USE OF ULTRAVIOLET RAY PRE-IRRADIATION TO IMPROVE THE ACCURACY OF LOW-DOSE MEASUREMENTS OF THE CT USING A GAFCHROMIC RTQA2 FILM
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