Head and neck adaptive radiotherapy: A tool for the detection of patients requiring adaptive radiotherapy

Cancer radiothérapie : journal de la Société française de radiothérapie oncologique
S HugerD Peiffert

Abstract

The purpose of this work was to implement a simple dosimetric alert tool in a retrospective study for six patients suffering from head and neck cancer to detect when a patient might require an adaptive radiotherapy. The dosimetric tool generates a 3D cartography of two dosimetric complementary information: a dose variation tolerance map and a dose differential map. The tolerance map is calculated on the initial scanner (CTinit) using the planned dose distribution. It shows for each voxel of each delineated volume the availability for local dose variations during the course of radiotherapy without exceeding the dose threshold. The differential dose map is generated on the tomographic image CBCT (CBCTtreatment). It shows dose variations between the planned and the actual delivered dose distribution for each voxel. By comparing both maps, when a voxel presents a value superior to the corresponding dose variation tolerance, an alert is generated and the anatomical areas concerned are visually indicated to the physician. The application of the dosimetric tool on six patients with head and neck cancers reveals the ability of the tool to detect cases requiring a new treatment plan. Two patients whose the tumour shrinkage produced an i...Continue Reading

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Citations

Sep 12, 2016·Cancer radiothérapie : journal de la Société française de radiothérapie oncologique·P BoisselierY Pointreau
Apr 16, 2017·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Kuo MenPeng Huang
Nov 29, 2017·Revue de l'infirmière·Michelle GaideSébastien Salas

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