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Use of a two-dimensional ionization chamber array for proton therapy beam quality assurance
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10.1118/1.2963990
/content/aapm/journal/medphys/35/9/10.1118/1.2963990
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/35/9/10.1118/1.2963990

Figures

Image of FIG. 1.
FIG. 1.

Comparison of proton beam depth dose curve in water obtained using a Markus chamber in water tank with that obtained using MatriXX in plastic water phantom without and with buildup material thickness correction.

Image of FIG. 2.
FIG. 2.

Linearity test for the response of MatriXX central detectors ( arrays) to delivered dose.

Image of FIG. 3.
FIG. 3.

Comparison of proton beam profiles measured simultaneously at depths of 23.1 and using film dosimetry and MatriXX, respectively.

Tables

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TABLE I.

Measured dose per for different proton energy using MatriXX central chamber arrays. The measured doses are scaled by dividing the relative output factors (ROF) that were measured using a Farmer chamber as part of a clinical commissioning process.

Generic image for table
TABLE II.

Comparison of proton beam flatness and symmetry measured using a PTW Pinpoint ionization chamber in a water tank and the MatriXX ion chamber array.

Generic image for table
TABLE III.

A typical set of measured flatness and symmetry values obtained using MatriXX for seven proton beams at four gantry angles

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/content/aapm/journal/medphys/35/9/10.1118/1.2963990
2008-08-07
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Use of a two-dimensional ionization chamber array for proton therapy beam quality assurance
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/35/9/10.1118/1.2963990
10.1118/1.2963990
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