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Naslov:Evaluation of two-dimensional dose distributions for pre-treatment patient-specific IMRT dosimetry
Avtorji:ID Smilović Radojčić, Đeni (Avtor)
ID Rajlić, David (Avtor)
ID Casar, Božidar (Avtor)
ID Švabić Kolacio, Manda (Avtor)
ID Obajdin, Nevena (Avtor)
ID Faj, Dario (Avtor)
ID Jurković, Slaven (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://content.sciendo.com/view/journals/raon/ahead-of-print/article-10.2478-raon-2018-0019.xml
 
.pdf PDF - Predstavitvena datoteka, prenos (786,37 KB)
MD5: 4D2BD9D966525D9211CE6F82D53D9714
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo OI - Onkološki inštitut Ljubljana
Povzetek:The accuracy of dose calculation is crucial for success of the radiotherapy treatment. One of the methods that represent the current standard for patient-specific dosimetry is the evaluation of dose distributions measured with an ionization chamber array inside a homogeneous phantom using gamma method. Nevertheless, this method does not replicate the realistic conditions present when a patient is undergoing therapy. Therefore, to more accurately evaluate the treatment planning system (TPS) capabilities, gamma passing rates were examined for beams of different complexity passing through inhomogeneous phantoms. Materials and methods The research was performed using Siemens Oncor Expression linear accelerator, Siemens Somatom Open CT simulator and Elekta Monaco TPS. A 2D detector array was used to evaluate dose distribution accuracy in homogeneous, semi-anthropomorphic and anthropomorphic phantoms. Validation was based on gamma analysis with 3%/3mm and 2%/2mm criteria, respectively. Results Passing rates of the complex dose distributions degrade depending on the thickness of non-water equivalent material. They also depend on dose reporting mode used. It is observed that the passing rate decreases with plan complexity. Comparison of the data for all set-ups of semi-anthropomorphic and anthropomorphic phantoms shows that passing rates are higher in the anthropomorphic phantom. Conclusions Presented results raise a question of possible limits of dose distribution verification in assessment of plan delivery quality. Consequently, good results obtained using standard patient specific dosimetry methodology do not guarantee the accuracy of delivered dose distribution in real clinical cases
Ključne besede:IMRT, 2D dose verification, gamma method, antropomorphic phantom
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2018
Založnik:Association of Radiology and Oncology
Leto izida:2018
Št. strani:str. 346-352, VIII
Številčenje:Vol. 52, no. 3
Izvor:Ljubljana
PID:20.500.12556/DiRROS-19079 Novo okno
UDK:615.82/.84
ISSN pri članku:1318-2099
DOI:10.2478/raon-2018-0019 Novo okno
COBISS.SI-ID:2986875 Novo okno
Avtorske pravice:by Authors
Datum objave v DiRROS:10.06.2024
Število ogledov:65
Število prenosov:41
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Gradivo je del revije

Naslov:Radiology and oncology
Skrajšan naslov:Radiol. oncol.
Založnik:Slovenian Medical Society - Section of Radiology, Croatian Medical Association - Croatian Society of Radiology
ISSN:1318-2099
COBISS.SI-ID:32649472 Novo okno

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:intenzitetna modulirana terapija, dvodimenzionalna dozna verifikacija, metoda gama, antropomorfni fantom


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