NDLI: Evaluation of effective energy for QA and QC: Measurement of half-value layer using radiochromic film density

Content Provider	Springer Nature Link
Author	Gotanda, T. Katsuda, T. Gotanda, R. Tabuchi, A. Yamamoto, K. Kuwano, T. Yatake, H. Takeda, Y.
Copyright Year	2009
Abstract	The effective energy of diagnostic X-rays is important for quality assurance (QA) and quality control (QC). However, the half-value layer (HVL), which is necessary to evaluate the effective energy, is not ubiquitously monitored because ionization-chamber dosimetry is time-consuming and complicated. To verify the applicability of GAFCHROMIC XR type R (GAF-R) film for HVL measurement as an alternative to monitoring with an ionization chamber, a single-strip method for measuring the HVL has been evaluated. Calibration curves of absorbed dose versus film density were generated using this single-strip method with GAF-R film, and the coefficient of determination (r $^{2}$) of the straight-line approximation was evaluated. The HVLs (effective energies) estimated using the GAF-R film and an ionization chamber were compared. The coefficient of determination (r $^{2}$) of the straight-line approximation obtained with the GAF-R film was more than 0.99. The effective energies (HVLs) evaluated using the GAF-R film and the ionization chamber were 43.25 keV (5.10 mm) and 39.86 keV (4.45 mm), respectively. The difference in the effective energies determined by the two methods was thus 8.5%. These results suggest that GAF-R might be used to evaluate the effective energy from the film-density growth without the need for ionization-chamber measurements.
Starting Page	26
Ending Page	29
Page Count	4
File Format	PDF
ISSN	01589938
Journal	Australasian Physics & Engineering Sciences in Medicine
Volume Number	32
Issue Number	1
e-ISSN	18795447
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	half-value layer radiochromic film effective energy quality assurance quality control Biomedicine general Biophysics and Biological Physics Medical and Radiation Physics Biomedical Engineering Theoretical, Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Physics and Astronomy Biophysics Biomedical Engineering

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