Effective energy measurement using radiochromic film: application of a mobile scanner

• Autorzy: Gotanda T. , Katsuda T. , Gotanda R. , Kuwano T. , Akagawa T. , Tanki N. , Tabuchi A. , Shimono T. , Kawaji Y. , Takeda Y.

Identyfikatory

DOI

10.1515/pjmpe-2016-0015

• Języki publikacji: EN

Abstrakty

EN

The effective energy calculated using the half-value layer (HVL) is an important parameter for quality assurance (QA) and quality control (QC). However constant monitoring has not been performed because measurements using an ionization chamber (IC) are time-consuming and complicated. To solve these problems, a method using radiochromic film (GAFCHROMIC EBT2 dosimetry film (GAF-EBT2) with slight energy dependency errors), a mobile scanner and step-shaped aluminum (SSAl) filter is developed. The results of the method using a mobile scanner were compared with those of the recommended method using an IC in order to evaluate its applicability. The difference ratios of the effective energies by each method using a mobile scanner with GAF-EBT2 were less than 5% compared with results of an IC. It is considered that this method offers a simple means of determining HVL for QA and QC consistently and quickly without the need for an IC dosimeter.

Słowa kluczowe

EN

radiochromic film; effective energy; half-value layer; mobile scanner; flat bed scanner

• Wydawca: Polskie Towarzystwo Fizyki Medycznej
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2016
• Tom: Vol. 22, Iss. 4
• Strony: 85--92
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Gotanda T.

• Department of Radiological Science, Faculty of Health Sciences, Junshin Gakuen University, Fukuoka, Japan

autor

Katsuda T.

• Department of Radiological Technology, Faculty of Health Sciences, Butsuryo College of Osaka, Osaka, Japan

autor

Gotanda R.

• Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki, Japan

autor

Kuwano T.

• Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama, Japan

autor

Akagawa T.

• Department of Radiological Technology, Tokushima Red Cross Hospital, Tokushima, Japan

autor

Tanki N.

• Department of Radiological Technology, Faculty of Health Sciences, Butsuryo College of Osaka, Osaka, Japan

autor

Tabuchi A.

• Department of Radiology, Kawasaki Medical School Kawasaki Hospital, Okayama, Japan

autor

Shimono T.

• Department of Radiological Science, Faculty of Health Sciences, Junshin Gakuen University, Fukuoka, Japan

autor

Kawaji Y.

• Department of Radiological Science, Faculty of Health Sciences, Junshin Gakuen University, Fukuoka, Japan

autor

Takeda Y.

• Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama, Japan

Bibliografia

• [1] Shepard SJ, Lin PP, Boone JM, et al. Quality control in diagnostic radiology. Madison, WI: Medical Physics Publishing, AAPM Report No 74; 2002.
• [2] Butson MJ, Yu PKN, Cheung T, et al. Radiochromic film for medical radiation dosimetry. Mat Sci EngR, 2003;41(3): 61-120.
• [3] Cheung T, Butson MJ, Yu PK. Reflection spectrometry analysis of irradiated GAFCHROMIC XR type R radiochromic films. Appl Radiat Isot, 2005;63(1):127-129.
• [4] Gotanda T, Katsuda T, Gotanda R, et al. Evaluation of effective energy for QA and QC: measurement of half-value layer using radiochromic film density. Australas Phys Eng Sci Med. 2009;32(1),26-29.
• [5] Gotanda T, Katsuda T, Gotanda R, et al. Half-value layer measurement: simple process method using radiochromic film. Australas Phys Eng Sci Med. 2009;32(3):150-158.
• [6] Gotanda T, Katsuda T, Gotanda R, et al. Evaluation of effective energy using radiochromic film and a step-shaped aluminum filter. Australas Phys Eng Sci Med. 2011;34(2):213-222.
• [7] International Specialty Products [Internet]. [cited 2016 October 18]. Available from: http://www.veritastk.co.jp/attached/2062/GAFCHROMICEBT2TechnicalBrief-Rev1.pdf
• [8] Sutherland JG, Rogers DW. Monte Carlo calculated absorbed-dose energy dependence of EBT and EBT2 film. Med Phys. 2010;37(3):1110-1116.
• [9] Dini SA, Koona RA, Ashburn JR, et al. Dosimetric evaluation of GAFCHROMIC XR type T and XR type R films. J Appl Clin Med. Phys. 2005;6(1):114-134.
• [10] Butson MJ, Cheung T, Yu PK. XR type-R radiochromic film x-ray energy response. Phys Med Biol. 2005;50(15):N195-N199.
• [11] Fletcher CL, Mills JA. An assessment of GafChromic film for measuring 50 kV and 100 kV percentage depth dose curves. Phys Med. Biol. 2008;53(11):N209-N218.
• [12] Butson MJ, Cheung T, Yu PK. Weak energy dependence of EBT gafchromic film dose response in the 50 kVp-10 MVp X-ray range. Appl Radiat Isot. 2006;64(1):60-62.
• [13] Tomic N, Devic S, DeBlois F, et al. Reference radiochromic film dosimetry in kilovoltage photon beams during CBCT image acquisition. Med Phys. 2010;37(3):1083-1092.
• [14] Butson MJ, Yu PK, Cheung T, et al. Energy response of the new EBT2 radiochromic film to x-ray radiation. Radiat Meas. 2010;45(7):836-839.
• [15] Rink A, VitkinIA, Jaffray DA. Energy dependence (75 kVp to 18 MV) of radiochromic films assessed using a real-time optical dosimeter. Med Phys. 2007;34(2):458-463.
• [16] Gotanda T, Katsuda T, Akagawa T, et al. Evaluation of GAFCHROMIC EBT2 dosimetry for the low dose range using a flat-bed scanner with the reflection mode. Australas Phys Eng Sci Med. 2013;36(1):59-63.
• [17] Butson E, Alnawaf H, Yu PK, et al. Scanner uniformity improvements for radiochromic film analysis with matt reflectance backing. Australas Phys Eng Sci Med. 2011;34(3):401-407.
• [18] Cheung T, Butson MJ, Yu PK. Post-irradiation colouration of Gafchromic EBT radiochromic film. Phys Med Biol. 2005;50(20):N281-N285.
• [19] EPSON [Internet]. [cited 2009 August 15]. Available from: http://www.epson.jp/support/manual/scanner/es2200.htm/
• [20] exemode [Internet]. [cited 2010 November 15]. Available from: http://www.exemode.com/yashica/fs/s40.html/
• [21] Seltzer SM, Hubbell JH. Tables and Graphs of Photon Mass Attenuation Coefficients and Mass Energy-Absorption Coefficients for Photon Energies 1 keV to 20 MeV for Elements Z = 1 to 92 and Some Dosimetric Materials. National Institute of Standards and Technology; 1995.