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Dosimetric impact of Acuros XB deterministic radiation transport algorithm for heterogeneous dose calculation in lung cancer
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10.1118/1.4802216
/content/aapm/journal/medphys/40/5/10.1118/1.4802216
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/5/10.1118/1.4802216

Figures

Image of FIG. 1.
FIG. 1.

Photograph of the RPC phantom (a), screen capture from the Eclipse TPS depicting the RPC thorax phantom, structure contours (heart, lungs, spinal cord, PTV, and film inserts) (b), and one CT slice depicting the locations of the TLDs (c).

Image of FIG. 2.
FIG. 2.

IMRT (left) and VMAT (right) plan geometries (a) and (d) and dose distributions in [the axial (b) and (e) and sagittal (c) and (f)] planes that contain films. The red dashed lines (lateral and inferior–superior) are the position of dose profiles in Fig. 3 .

Image of FIG. 3.
FIG. 3.

Dose profiles for AAA and AXB calculations and film measurements in the IMRT (a) and (b) and VMAT (c) and (d) plans. The profiles are for the lateral and inferior–superior lines marked in Fig. 2 . The dips in the middle of film inferior–superior profiles are because the gaps of sagittal film (see Fig. 4 ).

Image of FIG. 4.
FIG. 4.

The distribution of gamma index with ±3%/3 mm criteria for the first IMRT plan delivery (axial on the top, sagittal on the bottom). The results from the dose calculated by (from left to right) AAA, AXB_ , and AXB_ . The shadows inside the film region are the gaps of coronal and sagittal films. Bar plot represents gamma-index levels.

Image of FIG. 5.
FIG. 5.

The distribution of gamma index with ±3%/3 mm criteria for the first VAMT plan delivery (axial on the top, sagittal on the bottom). The results from the dose calculated by (from left to right) AAA, AXB_ , and AXB_ . The shadows inside the film region are the gaps of coronal and sagittal films. Bar plot represents gamma-index levels.

Image of FIG. 6.
FIG. 6.

Percentage of voxels passing gamma analysis with various criteria.

Image of FIG. 7.
FIG. 7.

DVHs calculated by AAA, AXB_ , and AXB_ for IMRT (a) and VMAT (b) plans.

Image of FIG. 8.
FIG. 8.

Central-axis dose profiles for three individual field plans. Each field corresponds to one of the IMRT fields. The total differences in the PTV between AAA and AXB are the summary of all nine fields.

Tables

Generic image for table
TABLE I.

Comparison of TLD measurements and the dose calculations from AAA and AXB ( and ).

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TABLE II.

Percentages of points meeting gamma criteria of ±3%/3 mm criteria.

Generic image for table
TABLE III.

DVH comparison between AAA and AXB.

Generic image for table
TABLE IV.

Computation times (in minutes) of AAA and AXB for IMRT and VMAT plans.

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/content/aapm/journal/medphys/40/5/10.1118/1.4802216
2013-04-22
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dosimetric impact of Acuros XB deterministic radiation transport algorithm for heterogeneous dose calculation in lung cancer
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/5/10.1118/1.4802216
10.1118/1.4802216
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