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

Đeni Smilovic Radojcic
Đeni Smilovic Radojcic
, 
David Rajlic
David Rajlic
, 
Bozidar Casar
Bozidar Casar
, 
Manda Svabic Kolacio
Manda Svabic Kolacio
, 
Nevena Obajdin
Nevena Obajdin
, 
Dario Faj
Dario Faj
 and 
Slaven Jurkovic
Slaven Jurkovic
   | Apr 30, 2018
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Article Category: Research Article
Published Online: Apr 30, 2018
Page range: 346 - 352
Received: Dec 05, 2017
Accepted: Feb 13, 2018
DOI: https://doi.org/10.2478/raon-2018-0019
© 2018 Đeni Smilovic Radojcic, David Rajlic, Bozidar Casar, Manda Svabic Kolacio, Nevena Obajdin, Dario Faj, Slaven Jurkovic, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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.
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).
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).

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.
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.

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.
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).
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).

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

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
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