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Characteristics of Gafchromic XRQA2 films for kV image dose measurement
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10.1118/1.3675398
/content/aapm/journal/medphys/39/2/10.1118/1.3675398
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/39/2/10.1118/1.3675398
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Percentage change in net reflectance of each film piece from net reflectance of largest film piece analyzed using largest ROI as a function of film size for different ROI.

Image of FIG. 2.
FIG. 2.

Variations of net reflectance with ROI for a film piece of 10 cm × 10 cm.

Image of FIG. 3.
FIG. 3.

Variations of net reflectance with distance from the center of the scanner (left y-axis: 1.3 cGy and right y-axis:9.0 cGy).

Image of FIG. 4.
FIG. 4.

Percentage change in net reflectance at different positions inside the scanner (position1 (left top corner), position 2 (left bottom corner), position 3 (right top corner), position 4 (right bottom corner), and position 5 (center of the scaner).

Image of FIG. 5.
FIG. 5.

Variations of the percentage difference in net reflectance and net optical density of portrait and lanscap scanning orientations with air kerma (left y-axis:transmission mode, and right y-axis: reflection mode).

Image of FIG. 6.
FIG. 6.

Dose calibration curve and uncertainty analysis with reflection mode. (a) Dose calibration curve and (b) uncertainty in dose calibration with 300 DPI scanning spatial resolution.

Image of FIG. 7.
FIG. 7.

Dose calibration curve and uncertainty analysis with transmission mode. (a) Dose calibration curve and (b) uncertainty in dose calibration with 300 DPI scanning spatial resolution.

Image of FIG. 8.
FIG. 8.

Variations of Percentage difference in net optical densities with air kerma when films scanned on alternate faces using transmission mode.

Image of FIG. 9.
FIG. 9.

Calibration uncertainty at measurement dose of 4.32 cGy with different scanning spatial resolution.

Image of FIG. 10.
FIG. 10.

Dose response curves of the film at 100 and 120 kVp.

Image of FIG. 11.
FIG. 11.

Postirradiation growth of net reflectance with time (left y-axis: 1.92 cGy and right y-axis: 4.32 and 6.08 cGy).

Image of FIG. 12.
FIG. 12.

Variation of normalized net reflectance with irradiation angle.

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/content/aapm/journal/medphys/39/2/10.1118/1.3675398
2012-01-24
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Characteristics of Gafchromic XRQA2 films for kV image dose measurement
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/39/2/10.1118/1.3675398
10.1118/1.3675398
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