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Calibration of GafChromic XR-RV3 radiochromic film for skin dose measurement using standardized x-ray spectra and a commercial flatbed scanner
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10.1118/1.3560422
/content/aapm/journal/medphys/38/4/10.1118/1.3560422
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/4/10.1118/1.3560422

Figures

Image of FIG. 1.
FIG. 1.

Free-in-air exposed XR-RV3 film calibration setup.

Image of FIG. 2.
FIG. 2.

GafChromic XR-RV3 film layers (Ref. 31). Note: The “yellow” polyester layer side of the film actually looks orange.

Image of FIG. 3.
FIG. 3.

Reflective density versus air kerma for UW80-M beam quality. Red, green, and blue channels isolated and analyzed separately.

Image of FIG. 4.
FIG. 4.

Air kerma versus reflective density of the calibration films exposed free-in-air to the four beam qualities. (a) Orange side of the film facing the x-ray source. (b) White side of the film facing the x-ray source.

Image of FIG. 5.
FIG. 5.

Energy dependence of XR-RV3 film versus air kerma. Normalized to UW120-M beam quality film response.

Image of FIG. 6.
FIG. 6.

Comparison of the primary GSF 80 (120 kVp) spectrum to the primary plus scatter spectrum incident upon the simulated air at and the active layer of the simulated film (the orange side facing the x-ray source) for the on-phantom geometry.

Image of FIG. 7.
FIG. 7.

Air kerma versus reflective density of the calibration films exposed free-in-air, plotted together with uncorrected free-in-air air kerma versus on-phantom RD and corrected on-phantom air kerma versus on-phantom RD. (The orange side facing the x-ray source; UW120-M beam.)

Image of FIG. 8.
FIG. 8.

Energy deposited in the film layers under free-in-air conditions, sampled in thick segments (GSF 80 primary spectra). Primary x rays enter the film from left side of the plot and exit on the right side of the plot .

Image of FIG. 9.
FIG. 9.

Contour plot of the pixel values of the uncorrected stitched image of the calibration film exposed free-in-air to 570 cGy air kerma, positioned and scanned separately at 42 different scanner bed locations on the Epson 10000XL scanner.

Image of FIG. 10.
FIG. 10.

Measured scanner profiles for each of the ten film darkness levels. The polynomial best-fit curves, excluding the outliers, are plotted as the dashed lines through the data points.

Image of FIG. 11.
FIG. 11.

Contour plot of the pixel values of the corrected stitched image of the calibration film exposed free-in-air to 570 cGy air kerma, positioned and scanned separately at 42 different scanner bed locations on the Epson 10000XL scanner.

Tables

Generic image for table
TABLE I.

Tungsten anode x-ray beam qualities for NIST, UW-ADCL, and Monte Carlo GSF beam codes, including the first HVL and homogeneity coefficients (HC).

Generic image for table
TABLE II.

Monte Carlo simulated beam characteristics of GSF spectra incident upon air at under free-in-air conditions and under PMMA phantom backscatter conditions.

Generic image for table
TABLE III.

Example uncertainty analysis for measured film data from UW80-M data, expressed as percent.

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/content/aapm/journal/medphys/38/4/10.1118/1.3560422
2011-03-15
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Calibration of GafChromic XR-RV3 radiochromic film for skin dose measurement using standardized x-ray spectra and a commercial flatbed scanner
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/4/10.1118/1.3560422
10.1118/1.3560422
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