Monte Carlo simulation for imaging dose estimation: application to the Elekta XVI kV-CBCT

H. Chesneau (1) , Delphine Lazaro-Ponthus (1) , Caroline Lafond (2) , O. Henry (2) , Jean-Pierre Manens (2) , Valentin Blideanu (3)

1 LM2S (CEA, LIST) - Laboratoire Modélisation et Simulation de Systèmes (CEA, LIST)
2 CRLCC - CRLCC Eugène Marquis
3 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)

Purpose/Objective: Cone-Beam Computed Tomography (CBCT) is progressively more used in clinical practice to ensure precision in target localization and patient positioning required by new radiotherapy treatment techniques. However, intensive use of image guidance procedures could add a significant extra dose to normal tissues and potentially amplify the risk for patients to develop radiation-induced cancer. Therefore, there is an increasing interest to evaluate the dose delivered by CBCT scans. The most accurate tool to evaluate this imaging dose is the Monte Carlo (MC) method. To this end, this study aims at developing a MC-based dose calculation tool to compute the imaging dose, and to validate it in pre-clinical conditions against dosimetric measurements.

Mots clés: Cone-Beam Computed Tomography (CBCT); patient positioning; image guidance procedures; extra dose; imaging dose; dose measurement; radiation-induced cancer; dosimetry; radiotherapy; Monte Carlo method; PENELOPE code

Domaines: Médecine nucléaire; Physique Médicale [physics.med-ph]; Modélisation et simulation; Applications [stat.AP]

H. Chesneau, Delphine Lazaro-Ponthus, Caroline Lafond, O. Henry, Jean-Pierre Manens, et al.. Monte Carlo simulation for imaging dose estimation: application to the Elekta XVI kV-CBCT. 3rd ESTRO Forum, Apr 2015, Barcelone, Spain. pp.S196-S197, ⟨10.1016/S0167-8140(15)40403-7⟩. ⟨hal-02268617⟩