title: [Head and neck adaptive radiotherapy].
abstract: Onboard volumetric imaging systems can provide accurate data of the patient's anatomy during a course of head and neck radiotherapy making it possible to assess the actual delivered dose and to evaluate the dosimetric impact of complex daily positioning variations and gradual anatomic changes such as geometric variations of tumors and normal tissues or shrinkage of external contours. Adaptive radiotherapy is defined as the correction of a patient's treatment planning to adapt for individual variations observed during treatment. Strategies are developed to selectively identify patients that require replanning because of an intolerable dosimetric drift. Automated tools are designed to limit time consumption. Deformable image registration algorithms are the cornerstones of these strategies, but a better understanding of their limits of validity is required before adaptive radiotherapy can be safely introduced to daily practice. Moreover, strict evaluation of the clinical benefits is yet to be proven.
authors: Service de radiothérapie, institut de cancérologie de Lorraine, 6, avenue de Bourgogne, 54519 Vandœuvre-lès-Nancy, France. Electronic address: p.graff@nancy.unicancer.fr.
authors: P
authors: P
authors: Graff
authors: S
authors: S
authors: Huger
authors: N
authors: N
authors: Kirby
authors: J
authors: J
authors: Pouliot
mesh_terms: D000465:Algorithms; D054893:Cone-Beam Computed Tomography; D004305:Dose-Response Relationship, Drug; D006258:Head and Neck Neoplasms / Q000532:radiotherapy*; D006801:Humans; D056888:Patient Positioning; D011874:Radiometry; D061089:Radiotherapy, Image-Guided; D050397:Radiotherapy, Intensity-Modulated / Q000379:methods*
keywords: Adaptive radiotherapy; Cancers ORL; Cumulative dose; Deformable image registration; Dose cumulée; Head and neck cancers; Image-guided radiotherapy; Radiothérapie adaptative; Radiothérapie guidée par l’image; Recalage déformable