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The role of nonelastic reactions in absorbed dose distributions from therapeutic proton beams in different medium
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10.1118/1.1824194
/content/aapm/journal/medphys/32/1/10.1118/1.1824194
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/1/10.1118/1.1824194

Figures

Image of FIG. 1.
FIG. 1.

A schematic representation of the phantom used in the depth dose simulations. A pencil beam of protons is traveling through the phantom and is stopping within the phantom. It is important to note the production of secondaries (photons and neutrons) as a direct result of nonelastic nuclear interactions of proton within the phantom.

Image of FIG. 2.
FIG. 2.

Comparison of simulation data supplied by Paganetti and GEANT4.5.2 simulation utilized in this investigation for a proton beam incident on a water phantom. Data were normalized to the peak dose.

Image of FIG. 3.
FIG. 3.

Comparison of depth dose distributions for a monoenergetic proton beam incident on different phantom materials.

Image of FIG. 4.
FIG. 4.

Comparison of depth dose distributions for a monoenergetic proton beam in different phantom materials.

Image of FIG. 5.
FIG. 5.

pencil proton beam depth dose distribution in a water phantom plotted on a logarithmic graph. The dose in this distribution has been normalized to the peak dose.

Tables

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TABLE I.

Material data for Perspex and water obtained for a proton beam (Ref. 4).

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TABLE II.

The Bragg peak position, ratio of peak to entrance dose, and the difference in this ratio between the simulation that accounts for nonelastic reactions and the one that does not for the depth dose distribution.

Generic image for table
TABLE III.

The Bragg peak position, ratio of peak to entrance dose, and the difference in this ratio between the simulation that accounts for nonelastic reactions and the one that does not for depth dose distribution.

Generic image for table
TABLE IV.

The integral dose and the difference in integral dose between the simulation that accounts for nonelastic reactions and the one that does not for depth dose distribution. Integral dose in cGy per 200 000 protons.

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/content/aapm/journal/medphys/32/1/10.1118/1.1824194
2004-12-14
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The role of nonelastic reactions in absorbed dose distributions from therapeutic proton beams in different medium
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/1/10.1118/1.1824194
10.1118/1.1824194
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