title: [Craniospinal irradiation -- patient positioning and verification with portal films].
abstract: BACKGROUND
  Implementation of an important step for quality assurance in irradiation of the craniospinal axis was made through changes in the irradiation technique. Crucial improvements in patient positioning and the possibility of taking portal films of the field junctions are described.
  
  
  METHODS
  A box for the positioning of the head of the patient in has been developed. In combination with vacuum cushions, it is a cheap method for the individual and secure positioning of the patient in prone position. Furthermore, a method for taking portal films of the field junctions between the lateral cranial and the upper dorsal spinal field as well as between the two dorsal spinal fields is described.
  
  
  CONCLUSIONS
  The use of the "Bonner Box" improves the patient positioning with respect to reproducibility, setup time and comfort. The documentation of the field junctions in craniospinal irradiation, which is described for the first time, is an important tool for quality assurance.
authors.affiliation: Abteilung für Strahlentherapie der Radiologischen Universitätsklinik Homburg/Saar. rawisser@uniklinik-saarland.de
authors.forename: Lothar
authors.initials: L
authors.lastname: Wisser
authors.forename: Tan Phu
authors.initials: TP
authors.lastname: Nguyen
authors.forename: Peter
authors.initials: P
authors.lastname: Barwig
authors.forename: Anja
authors.initials: A
authors.lastname: Stolz
authors.forename: Markus
authors.initials: M
authors.lastname: Niewald
authors.forename: Heinrich
authors.initials: H
authors.lastname: Schüller
mesh_terms: D001932:Brain Neoplasms / Q000532:radiotherapy*; D016371:Cranial Irradiation / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D007103:Immobilization; D008279:Magnetic Resonance Imaging; D016684:Prone Position; D011785:Quality Assurance, Health Care; D011880:Radiotherapy Planning, Computer-Assisted / Q000295:instrumentation*; D013125:Spinal Neoplasms / Q000532:radiotherapy*; D014057:Tomography, X-Ray Computed