title: [Intensity modulated radiation therapy: analysis of patient specific quality control results, experience of René-Gauducheau Centre].
abstract: OBJECTIVE
  Systematic verifications of patient's specific intensity-modulated radiation treatments are usually performed with absolute and relative measurements. The results constitute a database which allows the identification of potential systematic errors.
  
  
  METHODS
  We analyzed 1270 beams distributed in 232 treatment plans. Step-and-shoot intensity-modulated radiation treatments were performed with a Clinac (6 and 23 MV) and sliding window intensity-modulated radiation treatments with a Novalis (6 MV).
  
  
  RESULTS
  The distributions obtained do not show systematic error and all the control meet specified tolerances.
  
  
  CONCLUSIONS
  These results allow us to reduce controls specific patients for treatments performed under identical conditions (location, optimization and segmentation parameters of treatment planning system, etc.).
authors.affiliation: Service de physique médicale, centre René-Gauducheau, CLCC Nantes Atlantique, site hospitalier Nord, boulevard Jacques-Monod, 44805 Nantes Saint-Herblain cedex, France. s-chiavassa@nantes.fnclcc.fr
authors.forename: S
authors.initials: S
authors.lastname: Chiavassa
authors.forename: G
authors.initials: G
authors.lastname: Brunet
authors.forename: S
authors.initials: S
authors.lastname: Gaudaire
authors.forename: C
authors.initials: C
authors.lastname: Munos-Llagostera
authors.forename: G
authors.initials: G
authors.lastname: Delpon
authors.forename: A
authors.initials: A
authors.lastname: Lisbona
mesh_terms: D006801:Humans; D011786:Quality Control; D011879:Radiotherapy Dosage; D050397:Radiotherapy, Intensity-Modulated / Q000592:standards*