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Dosimetric characterization of CyberKnife radiosurgical photon beams using polymer gels
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10.1118/1.2919099
/content/aapm/journal/medphys/35/6/10.1118/1.2919099
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/35/6/10.1118/1.2919099

Figures

Image of FIG. 1.
FIG. 1.

(a), (b) Photographs showing the experimental setup for polymer gel dosimetry. (c) Photograph of the two irradiated gel vials immediately after their irradiation with the CyberKnife radiosurgical beams.

Image of FIG. 2.
FIG. 2.

(a), (b) The medial maps of the CyberKnife gel irradiated vials corresponding to a plane perpendicular to the beam axis, at 15 mm depth inside the water phantom. The experimentally defined beam center coordinates on these planes are also marked on the used coordinate system. (c) profiles measured in both gel vials along the axis at .

Image of FIG. 3.
FIG. 3.

Dose response data of the VIP gel formulation calculated using the gel vials irradiated with the HDR afterloader as well as using the 60 mm relative off-axis profiles of the two CyberKnife gel vials. The result of a linear fit to the four data sets presented is also presented.

Image of FIG. 4.
FIG. 4.

Polymer gel, diode, PinPoint, and EBT measured OAR values plotted vs off-axis distance, (mm) for the circular, CyberKnife radiosurgical beams of (a) 5 mm; (b) 7.5 mm; and (c) 10 mm diameter.

Tables

Generic image for table
TABLE I.

Output factor measurements for the 5, 7.5, and 10 mm diameter, circular, radiosurgical beams of the CyberKnife system. Corresponding data reported in the literature are also shown for comparison.

Generic image for table
TABLE II.

Experimental results of this work using various dosimeters, for the penumbra and field size of the 5, 7.5, and 10 mm diameter, circular, radiosurgical beams of the CyberKnife system. Uncertainty of presented results is on the order of 0.02.

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/content/aapm/journal/medphys/35/6/10.1118/1.2919099
2008-05-14
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dosimetric characterization of CyberKnife radiosurgical photon beams using polymer gels
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/35/6/10.1118/1.2919099
10.1118/1.2919099
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