title: Practical 3-D radiotherapy planning of brain tumors.
abstract: In postoperative radiotherapy of brain tumors it is usually the case that preoperative imaging studies, either CT or MRI, were performed outside of the purview of the radiation therapy department. Thus the target volume is defined in an imaging study that does not lend itself readily for entry to a 3-D treatment planning system. A method is described that adjusts the patient structure defined by scan data to an appropriate position for radiotherapy. Software tools that are simple to use have been incorporated in a 3-D treatment planning program that allows oblique treatment planes to be defined. The program provides beam's-eye-view plots of the fields that are used to overlay simulation films and will automatically describe a field blocking outline that provides a prescribed margin on the target volume or other structures that have been defined. Finally, dose calculations in arbitrary planes through the head are made and isodose plots produced.
authors.affiliation: Northwest Medical Physics Center, Lynnwood, WA 98036-7306.
authors.forename: D
authors.initials: D
authors.lastname: Jones
authors.forename: D A
authors.initials: DA
authors.lastname: Christopherson
authors.forename: J T
authors.initials: JT
authors.lastname: Washington
authors.forename: M D
authors.initials: MD
authors.lastname: Hafermann
authors.forename: J J
authors.initials: JJ
authors.lastname: Rieke
authors.forename: S
authors.initials: S
authors.lastname: Vermeulen
authors.forename: J
authors.initials: J
authors.lastname: Travaglini
authors.forename: E
authors.initials: E
authors.lastname: Taylor
authors.forename: W
authors.initials: W
authors.lastname: Taylor
mesh_terms: D001932:Brain Neoplasms / Q000532:radiotherapy*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D011880:Radiotherapy Planning, Computer-Assisted