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 |
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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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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 < 0.05). UV-A ray irradiation is an effective method for treating RTQA2; the accuracy in the extremely low-dose range of RTQA2 was improved.</description><identifier>ISSN: 0144-8420</identifier><identifier>EISSN: 1742-3406</identifier><identifier>DOI: 10.1093/rpd/ncab115</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Radiation protection dosimetry, 2021-06, Vol.195 (1), p.61-68</ispartof><rights>The Author(s) 2021. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><orcidid>0000-0003-0841-2627 ; 0000-0001-6633-6218</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,1578,27901,27902</link.rule.ids></links><search><creatorcontrib>Katsuda, Toshizo</creatorcontrib><creatorcontrib>Gotanda, Rumi</creatorcontrib><creatorcontrib>Gotanda, Tatsuhiro</creatorcontrib><creatorcontrib>Tanki, Nobuyoshi</creatorcontrib><creatorcontrib>Kuwano, Tadao</creatorcontrib><creatorcontrib>Yabunaka, Kouichi</creatorcontrib><title>USE OF ULTRAVIOLET RAY PRE-IRRADIATION TO IMPROVE THE ACCURACY OF LOW-DOSE MEASUREMENTS OF THE CT USING A GAFCHROMIC RTQA2 FILM</title><title>Radiation protection dosimetry</title><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 < 0.05). UV-A ray irradiation is an effective method for treating RTQA2; the accuracy in the extremely low-dose range of RTQA2 was improved.</description><issn>0144-8420</issn><issn>1742-3406</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNotkD1vwjAURa2qlUppp_4BT1WXFNuJCR4t44ClBFPHoWKK8ilRAUkTGDr1rzcIpjfcc6_0DgCvGH1gxNxJ15aTY5HlGNM7MMK-RxzXQ9N7MELY85yZR9AjeOr7b4SIz6g3An9JLKEOYBJawzdKh9JCw7dwbaSjjOFzxa3SK2g1VNHa6I2EdikhFyIxXGwv1VB_OXM9zESSx4mRkVzZ-BJcQGFhEqvVAnK44IFYGh0pAY395AQGKoyewUOd7fvq5XbHIAmkFUsn1AsleOg0BLOTU9e4Lqe4yAnL6rLCM9erSsbcvES4Kv26xNnwICb5kCGa-7QYkGzKaI5YjgrmjsH7dbftmp9z1Z_Sw64vqv0-O1bNuU8JpT71ZgT5A_p2RZtzm7bd7pB1vylG6cVwOhhOb4bdf7axZUc</recordid><startdate>20210601</startdate><enddate>20210601</enddate><creator>Katsuda, Toshizo</creator><creator>Gotanda, Rumi</creator><creator>Gotanda, Tatsuhiro</creator><creator>Tanki, Nobuyoshi</creator><creator>Kuwano, Tadao</creator><creator>Yabunaka, Kouichi</creator><general>Oxford University Press</general><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-0841-2627</orcidid><orcidid>https://orcid.org/0000-0001-6633-6218</orcidid></search><sort><creationdate>20210601</creationdate><title>USE OF ULTRAVIOLET RAY PRE-IRRADIATION TO IMPROVE THE ACCURACY OF LOW-DOSE MEASUREMENTS OF THE CT USING A GAFCHROMIC RTQA2 FILM</title><author>Katsuda, Toshizo ; Gotanda, Rumi ; Gotanda, Tatsuhiro ; Tanki, Nobuyoshi ; Kuwano, Tadao ; Yabunaka, Kouichi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o219t-ff1fd61cb29afde1834ed993bd01ed7fd1a14412bde105b75c183a695b09b0c93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Katsuda, Toshizo</creatorcontrib><creatorcontrib>Gotanda, Rumi</creatorcontrib><creatorcontrib>Gotanda, Tatsuhiro</creatorcontrib><creatorcontrib>Tanki, Nobuyoshi</creatorcontrib><creatorcontrib>Kuwano, Tadao</creatorcontrib><creatorcontrib>Yabunaka, Kouichi</creatorcontrib><collection>MEDLINE - Academic</collection><jtitle>Radiation protection dosimetry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Katsuda, Toshizo</au><au>Gotanda, Rumi</au><au>Gotanda, Tatsuhiro</au><au>Tanki, Nobuyoshi</au><au>Kuwano, Tadao</au><au>Yabunaka, Kouichi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>USE OF ULTRAVIOLET RAY PRE-IRRADIATION TO IMPROVE THE ACCURACY OF LOW-DOSE MEASUREMENTS OF THE CT USING A GAFCHROMIC RTQA2 FILM</atitle><jtitle>Radiation protection dosimetry</jtitle><date>2021-06-01</date><risdate>2021</risdate><volume>195</volume><issue>1</issue><spage>61</spage><epage>68</epage><pages>61-68</pages><issn>0144-8420</issn><eissn>1742-3406</eissn><abstract>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 < 0.05). UV-A ray irradiation is an effective method for treating RTQA2; the accuracy in the extremely low-dose range of RTQA2 was improved.</abstract><pub>Oxford University Press</pub><doi>10.1093/rpd/ncab115</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-0841-2627</orcidid><orcidid>https://orcid.org/0000-0001-6633-6218</orcidid></addata></record> |
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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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