title: Report of a study on IMRT planning strategies for ethmoid sinus cancer.
abstract: OBJECTIVE
  This communication reviews the planning strategies and dose statistics of nine IMRT plans generated for a complex head and neck case.
  
  
  METHODS
  An ethmoid sinus cancer case was sent as an IMRT planning task to all participants of the ESTRO course on "IMRT and Other Conformal Techniques in Practice", held in Amsterdam in June 2001.
  
  
  RESULTS
  Nine IMRT plans were generated for the case, the majority of the plans generated with commercial planning systems. The number of beam incidences ranged between four and eleven, while five of the nine beam setups were coplanar. The planning target volume dose homogeneity was inversely correlated with the degree of sparing of the surrounding organs at risk.
  
  
  CONCLUSIONS
  IMRT strategies for complex head and neck cases, such as ethmoid sinus cancer, can be strikingly different in various aspects, such as beam setup, total number of segments, PTV dose coverage and dose statistics for organs at risks.
authors.affiliation: Division of Radiotherapy, Ghent University Hospital, Belgium. filip@krtkg1.rug.ac.be
authors.forename: Filip
authors.initials: F
authors.lastname: Claus
authors.forename: Ben
authors.initials: B
authors.lastname: Mijnheer
authors.forename: Coen
authors.initials: C
authors.lastname: Rasch
authors.forename: Thomas
authors.initials: T
authors.lastname: Bortfeld
authors.forename: Benedick
authors.initials: B
authors.lastname: Fraass
authors.forename: Werner
authors.initials: W
authors.lastname: De Gersem
authors.forename: Holger
authors.initials: H
authors.lastname: Wirtz
authors.forename: Cordelia
authors.initials: C
authors.lastname: Hoinkis
authors.forename: Byung Chul
authors.initials: BC
authors.lastname: Cho
authors.forename: Lai Wan Dora
authors.initials: LW
authors.lastname: Kwong
authors.forename: Hoonsik
authors.initials: H
authors.lastname: Bae
authors.forename: Karin
authors.initials: K
authors.lastname: Muller
authors.forename: Wilfried
authors.initials: W
authors.lastname: De Neve
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery; D003131:Combined Modality Therapy; D005005:Ethmoid Sinus / Q000473:pathology / Q000528:radiation effects / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010255:Paranasal Sinus Neoplasms / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery; D011880:Radiotherapy Planning, Computer-Assisted; D018714:Radiotherapy, Adjuvant; D020266:Radiotherapy, Conformal; D015203:Reproducibility of Results