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Comparison of Monte Carlo calculations around a Fletcher Suit Delclos ovoid with radiochromic film and normoxic polymer gel dosimetry
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10.1118/1.1944247
/content/aapm/journal/medphys/32/7/10.1118/1.1944247
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/7/10.1118/1.1944247

Figures

Image of FIG. 1.
FIG. 1.

Simulation geometry of the left FSD ovoid. Component (A) is the anterior shielding segment, which has a thickness of 0.5 cm and width of 0.5 cm and is positioned 0.4 cm laterally from the center of the ovoid. Component (B) is the posterior shielding segment, which has a thickness of 0.5 cm and diameter of 1.8 cm and is positioned at a 45° angle in the ovoid. The anterior and posterior shields were constructed of densimet 17. This is a tungsten alloy of composition 90.5% W, 6.5% Ni, and 3% Fe and density of .

Image of FIG. 2.
FIG. 2.

Comparison of FSD ovoid dose calculations for shielded and unshielded geometries (A). The dashed lines are the unshielded calculations while the solid lines are the shielded calculations. (B) is a plot of the transmission through the shields.

Image of FIG. 3.
FIG. 3.

Optical density to dose curve for the ovoid irradiation. The solid line is a second order polynomial fit to the data .

Image of FIG. 4.
FIG. 4.

Monte Carlo calculation vs radiochromic film comparison for the left ovoid. Isodose lines are in units of Gy. Dashed lines are the film measurements, while the solid lines are the Monte Carlo calculations.

Image of FIG. 5.
FIG. 5.

vs dose curve for the ovoid irradiation. The solid line is a second order polynomial fit to the data . This figure reprinted with permission from K Gifford et al., J. Phys.: Conf. Ser. 3, 217–220 (2004) [Journal of Physics: Conference Series] © 2004 IOP Publishing Ltd.

Image of FIG. 6.
FIG. 6.

Monte Carlo calculation vs normoxic gel comparison for the right ovoid. Solid lines are the Monte Carlo calculations. Dashed lines indicate the gel measurements.

Tables

Generic image for table
TABLE I.

Composition of 1000 g of 5% methacrylic acid gel.

Generic image for table
TABLE II.

Composition and density of materials used in the Monte Carlo calculations.

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/content/aapm/journal/medphys/32/7/10.1118/1.1944247
2005-06-20
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Comparison of Monte Carlo calculations around a Fletcher Suit Delclos ovoid with radiochromic film and normoxic polymer gel dosimetry
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/7/10.1118/1.1944247
10.1118/1.1944247
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