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Evaluation of a new commercial Monte Carlo dose calculation algorithm for electron beams
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10.1118/1.4853375
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    Affiliations:
    1 Department of Medical Physics, The Ottawa Hospital Cancer Centre, The University of Ottawa, Ottawa, Ontario K1H 8L6, Canada; The Faculty of Medicine, The University of Ottawa, Ottawa, Ontario K1H 8M5, Canada; and Department of Physics, Carleton University, Ottawa, Ontario K1S 5B6, Canada
    2 Department of Medical Physics, The Ottawa Hospital Cancer Centre, The University of Ottawa, Ottawa, Ontario K1H 8L6, Canada; Department of Medical Biophysics, University of Toronto, Ontario M5G 2M9, Canada; and Heart and Stroke Foundation Centre for Stroke Recovery, Sunnybrook Research Institute, University of Toronto, Ontario M4N 3M5, Canada
    3 Department of Medical Physics, The Ottawa Hospital Cancer Centre, The University of Ottawa, Ottawa, Ontario K1H 8L6, Canada and The Faculty of Medicine, The University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
    4 Department of Medical Physics, The Ottawa Hospital Cancer Centre, The University of Ottawa, Ottawa, Ontario K1H 8L6, Canada; The Faculty of Medicine, The University of Ottawa, Ottawa, Ontario K1H 8M5, Canada; and Department of Physics, Carleton University, Ottawa, Ontario K1S 5B6, Canada
    a) Author to whom correspondence should be addressed. Electronic mail: evandervoort@toh.on.ca
    Med. Phys. 41, 021711 (2014); http://dx.doi.org/10.1118/1.4853375
/content/aapm/journal/medphys/41/2/10.1118/1.4853375
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/41/2/10.1118/1.4853375

Figures

Image of FIG. 1.
FIG. 1.

Comparison of XiO EMC calculated and measured applicator outputs for 9 and 17 MeV electron beams from a Siemens Primus unit.

Image of FIG. 2.
FIG. 2.

Comparison of measured and XiO EMC calculated outputs for different Cerrobend® cutouts in a 10 × 10 cm2 applicator for the 9 MeV electron beam, and two SSDs.

Image of FIG. 3.
FIG. 3.

Comparison of measured and XiO EMC calculated outputs for different Cerrobend® cutouts in a 10 × 10 cm2 applicator for the 17 MeV electron beam, and two SSDs.

Image of FIG. 4.
FIG. 4.

Comparison of measured and XiO EMC calculated dose profiles and depth dose curves for the 9 MeV electron beam, SSD = 100 cm, and a 10 × 10 cm2 applicator showing a profile at a depth of 22 mm.

Image of FIG. 5.
FIG. 5.

Comparison of measured and XiO EMC calculated dose profiles and depth dose curves for the 17 MeV electron beam, SSD = 100 cm, and a 10 × 10 cm2 applicator showing a dose profile at a depth of 23 mm.

Image of FIG. 6.
FIG. 6.

The top left of the shows isodose plots of the calculated and measured dose in the trachea and spine phantom data for the 9 MeV electron beam (200 MU) at a position 0 cm below the spine. The top right figure shows the 3D γ index (3%/2 mm) for these data. The lower plot shows the average crossline (horizontal) dose profiles averaged over all pixels between the blue dashed lines, and the XiO EMC calculated dose profile data corresponding to a depth of ±2 mm above the approximate position of the film estimated from the CT images.

Image of FIG. 7.
FIG. 7.

Same as Fig. 6 except data shown are for the 17 MeV electron beam (200 MU) for the film positioned 0 cm below the trachea/spine phantom.

Tables

Generic image for table
TABLE I.

Comparison of measured and XiO EMC calculated dose profiles and depth doses for the scanning water tank data collected as part of beam commissioning. Percentage of measured data points that, when compared to XiO EMC calculated dose planes a , pass a two-dimensional γ index criteria. The criteria used was a distance to agreement of 2 mm and a dose difference of 2% of the maximum for the measured percent depth dose curve. Measured data points were excluded from evaluation if the measured dose was ⩽5% of the maximum dose.

Generic image for table
TABLE II.

Percentage of pixels meeting the 2D and 3D γ index criteria for measured and calculated a data for the trachea and spine phantom experiment. The criteria used for the γ index was a distance to agreement of 2 mm and a dose difference of 3% of the maximum calculated dose (within a volume 5 mm thick in the depth direction centered on the film plane).

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/content/aapm/journal/medphys/41/2/10.1118/1.4853375
2014-01-14
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evaluation of a new commercial Monte Carlo dose calculation algorithm for electron beams
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/41/2/10.1118/1.4853375
10.1118/1.4853375
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