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Commissioning of the discrete spot scanning proton beam delivery system at the University of Texas M.D. Anderson Cancer Center, Proton Therapy Center, Houston
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10.1118/1.3259742
/content/aapm/journal/medphys/37/1/10.1118/1.3259742
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/37/1/10.1118/1.3259742
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A spot, defined as a burst of monoenergetic protons in a short time segment, deposits dose nonuniformly in a narrow region.

Image of FIG. 2.
FIG. 2.

Data flow for patient treatments using discrete spot scanning proton beam at PTC-H.

Image of FIG. 3.
FIG. 3.

Schematic of the scanning proton beam nozzle of the Hitachi ProBeat machine at PTC-H.

Image of FIG. 4.
FIG. 4.

Selected pristine Bragg peaks measured in water using a point by point approach.

Image of FIG. 5.
FIG. 5.

Integral doses in at the depth of as a function of energy. Circles are measured integral doses; squares are corrected integral doses; and dashed line is the correction factors.

Image of FIG. 6.
FIG. 6.

Linearity of the response of the main dose monitor over the range of MUs permitted by the system for 221.8 and proton beams with range of 30.6 and in water, respectively.

Image of FIG. 7.
FIG. 7.

FWHM of lateral profiles in air of single pencil beams at the isocenter plane as function of proton nominal energy .

Image of FIG. 8.
FIG. 8.

In-plane half lateral profiles of single pencil beams at isocenter plane in air for 72.5, 148.8, and energies. Measurements were performed with a cylindrical ionization chamber (model 31014, PTW-Freiburg, Freiburg, Germany).

Image of FIG. 9.
FIG. 9.

In-plane half lateral profile of single pencil beams measured in water for 72.5, 148.8, and . The surface of the water was placed at the isocenter plane.

Image of FIG. 10.
FIG. 10.

Example of spot position measurements using radiochromic films.

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/content/aapm/journal/medphys/37/1/10.1118/1.3259742
2009-12-04
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Commissioning of the discrete spot scanning proton beam delivery system at the University of Texas M.D. Anderson Cancer Center, Proton Therapy Center, Houston
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/37/1/10.1118/1.3259742
10.1118/1.3259742
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