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Evaluation of two-dimensional dose distributions for pre-treatment patient-specific IMRT dosimetry Cover

Evaluation of two-dimensional dose distributions for pre-treatment patient-specific IMRT dosimetry

Radiology and Oncology
Volume 52 (2018): Issue 3 (September 2018)
By: ,  ,  ,  ,  ,   and    
Open Access
|Apr 2018
Figures & tables

Figures & Tables

Figure 1

2D detector in combination with different phantoms: (A) homogeneous phantom; (B) CIRS phantom with long axis parallel to the beam axis; (C) CIRS phantom in patient position; (D) ART phantom-head&neck and (E) ART phantom-thorax.

Figure 2

Calculated dose distributions for IMRT4 plan on homogeneous (A), CIRS phantom with long axis parallel to the beam axis (B) and H&N part of ART phantom (C).

Table 1

Results of gamma analysis for measured and calculated dose distributions in homogeneous and CIRS thorax phantoms for different levels of plan complexity and different reporting modes

15x15IMRT1IMRT2IMRT3IMRT4
phantomgamma criteria% points passing with gamma<1
DwDmDwDmDwDmDwDmDwDm
MultiCube2mm/2%93,1295,6298,6896,7599,5398,6297,3296,0189,5984,68
3mm/3%98,7499,9799,9499,3399,9999,8199,6599,3198,2295,93
5N CIRS2mm/2%90,1391,5196,6394,9499,0398,7293,6888,4978,7470,37
3mm/3%97,5598,7198,2698,4499,9499,9298,6496,1992,0384,99
10N CIRS2mm/2%88,6186,1495,1192,3999,1497,993,2584,5477,5170,52
3mm/3%97,1896,1596,0797,1799,9899,6497,7692,5789,4884,19
15N CIRS2mm/2%85,7386,0696,3594,4598,4297,4289,6784,6672,1664,7
3mm/3%96,4496,4699,3398,1799,9999,3696,9793,3286,6979,06
CIRS2mm/2%85,0581,591,7289,1697,6697,0988,2582,9367,2959,28
3mm/3%9695,9193,9895,5299,8399,2796,4392,3486,7276,6
Figure 3

Gamma analysis with 2%/2mm criteria for dose-to-media (left) and dose-to-water (right) reporting modes related to the complexity of the particular plan, measured over homogeneous phantom and various set-ups of the semianthropomorphic phantom.

Table 2

Results of gamma analysis for measured and calculated dose distributions in the thorax, pelvic and head and neck parts of Alderson phantom for different levels of plan complexity and different reporting modes

15x15IMRT1IMRT2IMRT3IMRT4
phantomgamma criteria% points passing with gamma<1
DwDmDwDmDwDmDwDmDwDm
Thorax Alderson2mm/2%86,3986,1897,696,7995,0294,286,384,5975,4473,62
3mm/3%94,2496,1999,2698,8997,697,0794,0793,1993,5790,8
Pelvic Alderson2mm/2%92,0595,7599,1598,1697,0594,6190,8589,4778,4876,33
3mm/3%99,1999,8299,9999,6599,598,5797,8595,7293,9392,99
H&N Alderson2mm/2%91,5991,8298,1497,6595,9694,8395,4594,183,5179,86
3mm/3%97,298,0199,6599,5399,1298,1498,8298,3494,7393,03
Figure 4

Gamma analysis with 2%/2mm criteria for dose-to-media (left) and dose-to-water (right) reporting modes related to plan complexity, measured over different parts of the anthropomorphic phantom.

Figure 5

Gamma passing rate differences using 2%/2mm criteria between reporting modes related to plan complexity and phantom acquired over homogeneous phantom and different set-ups of the semi-anthropomorphic phantom (left) and different parts of the anthropomorphic phantom (right).

DOI: https://doi.org/10.2478/raon-2018-0019 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099
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Language: English
Page range: 346 - 352
Submitted on: Dec 5, 2017
Accepted on: Feb 13, 2018
Published on: Apr 30, 2018
Published by: Association of Radiology and Oncology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
IMRT,
2D dose verification,
gamma method,
anthropomorphic phantom
Related subjects:
Medicine,
Clinical medicine,
Radiology

© 2018 Đeni Smilovic Radojcic, David Rajlic, Bozidar Casar, Manda Svabic Kolacio, Nevena Obajdin, Dario Faj, Slaven Jurkovic, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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