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

Đeni Smilovic Radojcic

Đeni Smilovic Radojcic

University Hospital Rijeka, Medical Physics DepartmentRijeka, Croatia
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Radojcic, Đeni Smilovic
, 
David Rajlic

David Rajlic

University Hospital Rijeka, Medical Physics DepartmentRijeka, Croatia
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Rajlic, David
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Bozidar Casar

Bozidar Casar

Institute of Oncology LJubljana, Department of Radiation PhysicsLjubljana, Slovenia
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Casar, Bozidar
, 
Manda Svabic Kolacio

Manda Svabic Kolacio

University Hospital Rijeka, Medical Physics DepartmentRijeka, Croatia
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Kolacio, Manda Svabic
, 
Nevena Obajdin

Nevena Obajdin

University Hospital Rijeka, Medical Physics DepartmentRijeka, Croatia
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Obajdin, Nevena
, 
Dario Faj

Dario Faj

  • Faculty of Medicine, University of OsijekOsijek, Croatia
  • Faculty of Dental Medicine and Health, University of OsijekOsijek, Croatia
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Faj, Dario
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Slaven Jurkovic

Slaven Jurkovic

  • University Hospital Rijeka, Medical Physics DepartmentRijeka, Croatia
  • Department of Medical Physics and Biophysics, Faculty of Medicine, University of RijekaRijeka, Croatia
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Jurkovic, Slaven
  
30. Apr. 2018
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Artikel-Kategorie: Research Article
Online veröffentlicht: 30. Apr. 2018
Seitenbereich: 346 - 352
Eingereicht: 05. Dez. 2017
Akzeptiert: 13. Feb. 2018
DOI: https://doi.org/10.2478/raon-2018-0019
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© 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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