engleski

Out-of-field dose measurements for radiotherapy treatments of paediatric brain tumour using different techniques (3d CRT, IMRT and Gamma Knife), Overview of the activity within EURADOS WG9

The goal of EURADOS Working Group 9 (Radiation Dosimetry in Radiotherapy) is to assess unwanted, non-target patient doses and related risks of secondary cancer in different radiotherapy techniques. Paediatric patients are of particular concern due to their possible longer life expectancy and increased organ radiosensitivities compared to adult patients together with higher organ doses because of their smaller body size. A vulnerable group of patients are children with brain tumours. Brain and central nervous system- tumours are the second most common tumours in children and have a high survival rate. The out-of-field doses in these patients therefore raise an important radioprotection concern. A summary will be presented of out-of-field dose measurements in clinical conditions using anthropomorphic paediatric phantoms which received a simulated treatment of a brain tumour with three different techniques (intensity modulated radiotherapy (IMRT), 3D conformal radiotherapy (3D CRT) and Gamma Knife). Dosimetry was performed with 3 different techniques: thermoluminescence (TL), radiophotoluminescence (RPL) and optically stimulated (OSL) dosimetry. Additional information on the performance of these dosimetry systems in measuring out-of-field doses in photon radiotherapy, a topic that is also studied by EURADOS WG9, is summarised.

out-of-field dosimetry ; luminescent dosimetry ; radiotherapy ; gamma knife

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