Influence of routine MV CBCT usage on dose distribution in pelvic radiotherapy (CROSBI ID 631292)
Prilog sa skupa u zborniku | izvorni znanstveni rad | domaća recenzija
Podaci o odgovornosti
Kasabašić, Mladen ; Ivković, Ana ; Tomaš, Ilijan ; Jurković, Slaven ; Faj, Dario
engleski
Influence of routine MV CBCT usage on dose distribution in pelvic radiotherapy
The pelvic radiotherapy is a standard treatment for patients with cervical, uterine and rectal carcinomas. During radiation treatment open tabletop device or bellyboard is used to reduce the side effects of healthy surrounding tissue. Patients are continually adjusting to the bellyboard during the treatment which causes geometrical and dosage uncertainties and influences the results of the treatment. Therefore, to reduce this uncertainties, mega-voltage cone-beam computed tomography (MV CBCT) system is used. The objective of this research was to evaluate the image acquisition dose delivered to patients from MV CBCT. MV CBCT imaging was simulated on 15 patients using 3D treatment planning software XiO (CMS Inc., St. Louis, MO). The influence of the routine MV CBCT usage on treatment plan was investigated by analyzing the changes in dose volume histograms, mean values and maximum doses in the planning volumes. Simulations have shown that daily usage of MV CBCT causes differences in the dose volume histograms. Moreover, for every patient mean value exceeded prescribed tolerance (±1% of the prescribed dose) and maximum value exceeded recommended maximum of 107% of the prescribed dose. The results have shown that MV CBCT dose to the patient should be a part of RT plan.
radiotherapy ; CBCT
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Podaci o prilogu
295-301.
2013.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of the ninth symposium of the CRPA
Knežević, Ž. ; Majer, M. ; Krajcar Bronić, I.
Zagreb: Hrvatsko društvo za zaštitu od zračenja
978-953-96133-8-7
Podaci o skupu
Deveti simpozij Hrvatskog društva za zaštitu od zračenja
predavanje
10.04.2013-12.04.2013
Krk, Hrvatska