Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media
Advances of radiation delivery devices have increased the complexity of the radiation oncology treatments. Herewith, outcome of the treatment, as well as patient safety, strongly depend on the consistency of absorbed dose delivery. Both can be ensured by comprehensive system of verification...
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| Format: | Article |
| Language: | English |
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VINCA Institute of Nuclear Sciences
2022-01-01
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| Series: | Nuclear Technology and Radiation Protection |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-3994/2022/1451-39942202138O.pdf |
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| author | Obajdin Nevena Smilović-Radojčić Djeni Rajlić David Švabić-Kolacio Manda Jurković Slaven |
| author_facet | Obajdin Nevena Smilović-Radojčić Djeni Rajlić David Švabić-Kolacio Manda Jurković Slaven |
| author_sort | Obajdin Nevena |
| collection | DOAJ |
| description | Advances of radiation delivery devices have increased the complexity of the
radiation oncology treatments. Herewith, outcome of the treatment, as well
as patient safety, strongly depend on the consistency of absorbed dose
delivery. Both can be ensured by comprehensive system of verification of
calculated absorbed dose distributions. Standard method is evaluation of
calculated absorbed dose distribution according to gamma method, using a 2-D
detector and a homogeneous phantom, to obtain measured dose distribution.
Purpose of this research was to investigate the influence of tolerance
criteria on gamma passing rate. Additionally, the agreement in heterogeneous
phantom was analysed. Absorbed dose calculations were performed using systems Monaco and XiO. Detector with 1020 ionization chambers in homogeneous
phantom and semi-anthropomorphic phantom was used for measurements. Absorbed
dose distributions of around 3500 patients were analysed using gamma method.
In homogeneous phantom, average gamma passing rates were within tolerance
for 3 %/2 mm. For measurements in heterogeneous media, the highest average
gamma passing rate was obtained for small volumes of medium treatment
complexity (γ¯=93.84%), while large volumes of treatment with low
complexity yielded the lowest gamma passing rates (γ¯= 83.22%). |
| first_indexed | 2024-04-11T13:44:35Z |
| format | Article |
| id | doaj.art-e29de57a5b0742cb8f3d9f22a07599cc |
| institution | Directory Open Access Journal |
| issn | 1451-3994 1452-8185 |
| language | English |
| last_indexed | 2024-04-11T13:44:35Z |
| publishDate | 2022-01-01 |
| publisher | VINCA Institute of Nuclear Sciences |
| record_format | Article |
| series | Nuclear Technology and Radiation Protection |
| spelling | doaj.art-e29de57a5b0742cb8f3d9f22a07599cc2022-12-22T04:21:08ZengVINCA Institute of Nuclear SciencesNuclear Technology and Radiation Protection1451-39941452-81852022-01-0137213814410.2298/NTRP2202138O1451-39942202138OImpact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous mediaObajdin Nevena0Smilović-Radojčić Djeni1Rajlić David2Švabić-Kolacio Manda3Jurković Slaven4Medical Physics Department, University Hospital Rijeka, Rijeka, CroatiaMedical Physics Department, University Hospital Rijeka, Rijeka, Croatia + Department of Medical Physics and Biophysics, Faculty of Medicine, University of Rijeka, Rijeka, CroatiaMedical Physics Department, University Hospital Rijeka, Rijeka, CroatiaMedical Physics Department, University Hospital Rijeka, Rijeka, CroatiaMedical Physics Department, University Hospital Rijeka, Rijeka, Croatia + Department of Medical Physics and Biophysics, Faculty of Medicine, University of Rijeka, Rijeka, CroatiaAdvances of radiation delivery devices have increased the complexity of the radiation oncology treatments. Herewith, outcome of the treatment, as well as patient safety, strongly depend on the consistency of absorbed dose delivery. Both can be ensured by comprehensive system of verification of calculated absorbed dose distributions. Standard method is evaluation of calculated absorbed dose distribution according to gamma method, using a 2-D detector and a homogeneous phantom, to obtain measured dose distribution. Purpose of this research was to investigate the influence of tolerance criteria on gamma passing rate. Additionally, the agreement in heterogeneous phantom was analysed. Absorbed dose calculations were performed using systems Monaco and XiO. Detector with 1020 ionization chambers in homogeneous phantom and semi-anthropomorphic phantom was used for measurements. Absorbed dose distributions of around 3500 patients were analysed using gamma method. In homogeneous phantom, average gamma passing rates were within tolerance for 3 %/2 mm. For measurements in heterogeneous media, the highest average gamma passing rate was obtained for small volumes of medium treatment complexity (γ¯=93.84%), while large volumes of treatment with low complexity yielded the lowest gamma passing rates (γ¯= 83.22%).http://www.doiserbia.nb.rs/img/doi/1451-3994/2022/1451-39942202138O.pdfpre-treatment absorbed dose verificationtolerance criteriainhomogeneous mediacalculation algorithmpatient safety |
| spellingShingle | Obajdin Nevena Smilović-Radojčić Djeni Rajlić David Švabić-Kolacio Manda Jurković Slaven Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media Nuclear Technology and Radiation Protection pre-treatment absorbed dose verification tolerance criteria inhomogeneous media calculation algorithm patient safety |
| title | Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media |
| title_full | Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media |
| title_fullStr | Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media |
| title_full_unstemmed | Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media |
| title_short | Impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media |
| title_sort | impact of stringent tolerance criteria on verification of absorbed dose distributions and evaluation through inhomogeneous media |
| topic | pre-treatment absorbed dose verification tolerance criteria inhomogeneous media calculation algorithm patient safety |
| url | http://www.doiserbia.nb.rs/img/doi/1451-3994/2022/1451-39942202138O.pdf |
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