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The Swiss IMRT dosimetry intercomparison using a thorax phantom
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10.1118/1.3460795
/content/aapm/journal/medphys/37/8/10.1118/1.3460795
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/37/8/10.1118/1.3460795

Figures

Image of FIG. 1.
FIG. 1.

Schematic view of the CIRS thorax phantom. Right: Ionization chamber measurements are performed in the 15 cm slice. Left: Standard slice. Sketch provided with courtesy by CIRS Inc.

Image of FIG. 2.
FIG. 2.

TLD and ionization chamber (Pos1–Pos4) measurement points.

Image of FIG. 3.
FIG. 3.

Graphical representation of the dose difference values for an IMRT case, planned with seven fields (gantry angles of 40°, 90°, 125°, 180°, 235°, 285°, and 345°). Deviations larger than 5% are highlighted in dark gray. Deviations within 1% are represented in white. Left: Type a algorithm (Eclipse PBC); right: Type b algorithm (Eclipse AAA), for the same treatment unit and measurement set.

Image of FIG. 4.
FIG. 4.

Mean absolute values (error bars for 1 SD) grouped according to the irradiation technique and the applied algorithm type. The number of comparisons is quoted in parentheses.

Image of FIG. 5.
FIG. 5.

Graded values for PTV lung and normal tissue. Black symbols: Type a algorithms; white symbols: Type b algorithms. Irradiation techniques are indicated with different symbols.

Tables

Generic image for table
TABLE II.

Results of the absolute dosimetry measurements (28 evaluations).

Generic image for table
TABLE I.

Applied TPS, calculation algorithms, and irradiation techniques.

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TABLE III.

Ion chamber and TLD measurements in the soft tissue and lung region within the PTV: Mean values and associated uncertainties in %. The number of cases per algorithm is added in parentheses. For the Tomotherapy machine, the ionization chamber measurements are missing.

Generic image for table
TABLE IV.

Mean percentage values in the regions outside the PTV.

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/content/aapm/journal/medphys/37/8/10.1118/1.3460795
2010-07-29
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The Swiss IMRT dosimetry intercomparison using a thorax phantom
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/37/8/10.1118/1.3460795
10.1118/1.3460795
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