Calibration of Gafchromic XR-RV3 film under interventional radiology conditions

• Autorzy: Kidoń Joanna , Polaczek-Grelik Kinga , Gołba Krzysztof , Wojakowski Wojciech , Ochała Andrzej

Identyfikatory

DOI

10.2478/pjmpe-2021-0020

• Języki publikacji: EN

Abstrakty

EN

Introduction: The purpose of the study was the calibration of Gafchromic films in clinical interventional radiology conditions and the assessment of the influence of dose range, the shape of the fitting curve, and its practical application. The aim of the work was to show how practically perform calibration in a wide range of doses. Material and methods: Gafchromic XR–RV3 films were included in the study. The calibration was performed for A and B film series separately. Doses from the range of 0 – 8 Gy were used. Film dosimeters were read out in reflective mode with a commercial flatbed scanner. Results: Among various degrees of a polynomial function, the best fit, which fulfilled the chosen criterion of 95% agreement between measured and reconstructed doses and simple equation criterion, was observed for third-degree polynomial. The fitting curve where the dose is the function of optical density (logMPV) was demonstrated to be more precise than the fitting curve based on MPV only. To minimize the difference between dose absorbed by the film and dose reconstructed from the fitting curve below 5% it is necessary to divide the calibration range of 0 – 8 Gy into two subranges for use in interventional radiology. This difference was set at a maximum level of 3.8% and 1.9% for the lowand high-dose range, respectively. Each series of films may have a slightly different calibration curve, especially for the low dose range. A deviation of up to 36% between two batches of Gafchromic film was observed. Conclusions: For the third-degree polynomial fitting function (one of the recommended in the literature) calibration should be done into low and high dose ranges and for each batch separately. A systematic error higher than 20% could be introduced when the fitting curve from one film batch is applied to the other film batch.

Słowa kluczowe

EN

calibration curve; Gafchromic film; XR-RV3; fluoroscopically guided intervention

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2021
• Tom: Vol. 27, Iss. 2
• Strony: 165--173
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Kidoń Joanna

• Invasive Cardiology and Electrocardiology Department, 3rd Department of Cardiology, Medical University of Silesia, Katowice, Poland

autor

Polaczek-Grelik Kinga

• Prof. K. Gibiński Memorial University Clinical Centre, Medical University of Silesia, Poland

autor

Gołba Krzysztof

• Department of Electrocardiology and Heart Failure, Medical University of Silesia, Poland

autor

Wojakowski Wojciech

• 3rd Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, Poland

autor

Ochała Andrzej

• Invasive Cardiology and Electrocardiology Department, 3rd Department of Cardiology, Medical University of Silesia, Katowice, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).