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.
TLD and ionization chamber (Pos1–Pos4) measurement points.
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.
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.
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.
Results of the absolute dosimetry measurements (28 evaluations).
Applied TPS, calculation algorithms, and irradiation techniques.
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.
Mean percentage values in the regions outside the PTV.
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