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Small field in-air output factors: The role of miniphantom design and dosimeter type
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10.1118/1.4861710
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    Affiliations:
    1 Illawarra Cancer Care Centre, Wollongong Hospital, Wollongong, New South Wales 2521, Australia and Centre for Medical Radiation Physics, University of Wollongong, Wollongong, New South Wales 2522, Australia
    2 School of Physics, University of Western Australia, Crawley, Western Australia 6009, Australia and Department of Radiation Oncology, Sir Charles Gairdner Hospital, Perth, Western Australia 6009, Australia
    3 School of Physics, University of Sydney, Darlington, New South Wales 2008, Australia
    4 Chris O'Brien Lifehouse, Radiation Oncology, Sydney, New South Wales 2050, Australia
    5 School of Physics, University of Western Australia, Crawley, Western Australia 6009, Australia and Department of Radiation Oncology, Sir Charles Gairdner Hospital, Perth, Western Australia 6009, Australia
    6 School of Physics, University of Sydney, Darlington, New South Wales 2008, Australia
    7 School of Physics, University of Sydney, Darlington, New South Wales 2008, Australia and Chris O'Brien Lifehouse, Radiation Oncology, Sydney, New South Wales 2050, Australia
    a) Author to whom correspondence should be addressed. Electronic mail: kirbie.warrener@sesiahs.health.nsw.gov.au; Telephone: 0449252644.
    Med. Phys. 41, 021723 (2014); http://dx.doi.org/10.1118/1.4861710
/content/aapm/journal/medphys/41/2/10.1118/1.4861710
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/41/2/10.1118/1.4861710

Figures

Image of FIG. 1.
FIG. 1.

The brass top and cap miniphantom designs used in this study. (a) and (b) 3, 5, and 7 mm diameter d tops and 11 mm diameter d cap and, (c) and (d) 7 mm diameter d top and 11 mm diameter d cap.

Image of FIG. 2.
FIG. 2.

S for MLCs measured using 60012 diode with 11 mm wide caps and 7 mm wide tops. The equivalent heights of the caps and tops are either d or d. The uncertainty bars are smaller than the symbols used.

Image of FIG. 3.
FIG. 3.

S for (a) MLCs and (b) cone collimation measured using 60012 diode with tops of width 3, 5, and 7 mm and an ionization chamber with 11 mm cap. The equivalent heights of the tops and cap are d. The uncertainty bars are smaller than the symbols used.

Image of FIG. 4.
FIG. 4.

S for cone collimation measured using the 60012 diode, SFD diode, FOD and EBT2 film with 3 mm wide tops with equivalent height d. Monte Carlo calculated S are also shown. The uncertainty bars represent one standard deviation.

Tables

Generic image for table
TABLE I.

The external dimension and sensitive volume dimensions of each detector used in this study.

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/content/aapm/journal/medphys/41/2/10.1118/1.4861710
2014-01-24
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Small field in-air output factors: The role of miniphantom design and dosimeter type
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/41/2/10.1118/1.4861710
10.1118/1.4861710
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