Naslov
Utjecaj pogreške u položaju bolesnika tijekom zračenja zdjelice na raspodjelu doze
(Influence of daily set-up errors on dose distribution during pelvis radiotherapy)

Autori
Kasabašić, Mladen ; Rajevac, Vedran ; Jurković, Slaven ; Ivković, Ana ; Šobat, Hrvoje ; Faj, Dario

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova 8. simpozija Hrvatskog društva za zaštitu od zračenja / Krajcar Bronić, Ines ; Kopjar, Nevenka ; Milić, Mirta ; Branica, Gina - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 2011, 330-337

ISBN
978-953-96133-7-0

Skup
8. simpozija Hrvatskog društva za zaštitu od zračenja

Mjesto i datum
Krk, Hrvatska, 13.04.2011. - 15.04.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
radioterapija ; kontrola kvalitete ; položaj bolesnika ; raspodjela doze
(radiotherapy ; quality control ; set-up error ; dose distribution)

Sažetak
An external beam radiotherapy (EBRT) using megavoltage beams of linear accelerator is usually treatment of choice for the cancer patients. The goal of EBRT is to deliver prescribed dose to the target volume, with as low as possible dose to the surrounding healthy tissue (1). A large number of procedures and different professions involved in radiotherapy process, uncertainty of equipment and daily patient set-up errors can cause difference between planned and delivered dose (1, 2, 3). We investigated which part of this difference is caused by daily patient set-up errors. Daily set- up errors for 35 patients were measured (1, 2, 3). Those set-up errors were simulated on 5 patients, using 3D treatment planning software XiO (CMS Inc., St. Louis, MO). The differences in dose distributions between planned and shifted ‘geometry’ were investigated. Additionally, errors influence on treatment plan selection was checked analyzing change in dose volume histograms, conformity index (CI) and homogeneity index (HI). Simulations showed that patient daily set-up errors can cause significant differences between planned and actual dose distributions. Moreover, for some patients those errors influenced choice of treatment plan since CI fell under 95%. Surprisingly, HI was not as sensitive on set-up errors. The results showed the need for minimizing daily set-up errors by quality assurance programme

Izvorni jezik
Hrvatski

Znanstvena područja
Fizika, Temeljne medicinske znanosti, Kliničke medicinske znanosti

POVEZANOST RADA