PATIENT DOSE IN IMAGE GUIDED RADIOTHERAPY: MONTE CARLO STUDY OF THE CBCT DOSE CONTRIBUTION

被引：1

作者：

Leotta, Salvatore ^{[1
]}

Amato, Ernesto ^{[2
,3
]}

Settineri, Nicola ^{[4
]}

Basile, Emilia ^{[4
]}

Italiano, Antonio ^{[3
]}

Auditore, Lucrezia ^{[3
,5
]}

Santacaterina, Anna ^{[4
]}

Pergolizzi, Stefano ^{[2
,5
]}

机构：

[1] Radiosurg Ctr, Agropoli, Italy

[2] Univ Messina, Dipartimento Sci Biomed Odontoiatr & Immagini Mor, Messina, Italy

[3] Ist Nazl Fis Nucl, Sez Catania, Catania, Italy

[4] Azienda Osped Papardo, Messina, Italy

[5] Azienda Osped Univ Policlin G Martino, Messina, Italy

来源：

ATTI ACCADEMIA PELORITANA DEI PERICOLANTI-CLASSE DI SCIENZE FISICHE MATEMATICHE E NATURALI | 2018年 / 96卷 / 01期

关键词：

D O I：

10.1478/AAPP.961A3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Image Guided RadioTherapy (IGRT) is a technique whose diffusion is growing thanks to the well-recognized gain in accuracy of dose delivery. However, multiple Cone Beam Computed Tomography (CBCT) scans add dose to patients, and its contribution has to be assessed and minimized. Aim of our work was to evaluate, through Monte Carlo simulations, organ doses in IGRT due to CBCT and therapeutic MV irradiation in head-neck, thorax and pelvis districts. We developed a Monte Carlo simulation in GAMOS (Geant4-based Architecture for Medicine-Oriented Simulations), reproducing an Elekta Synergy medical linac operating at 6 and 10 MV photon energy, and we set up a scalable anthropomorphic model. After a validation by comparison with the experimental quality indexes, we evaluated the average doses to all organs and tissues belonging to the model for the three cases of irradiated district. Scattered radiation in therapy is larger than that diffused by CBCT by one to two orders of magnitude.

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页数：12

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