title: Border separation for adjacent orthogonal fields.
abstract: Field border separations for adjacent orthogonal fields can be calculated geometrically, given the validity of some important assumptions such as beam alignment and field uniformity. Thermoluminescent dosimetry (TLD) measurements were used to investigate dose uniformity across field junctions as a function of field separation and, in particular, to review the CCSG recommendation for the treatment of medulloblastoma with separate head and spine fields.
authors.affiliation: Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Hospitals, Minneapolis 55455.
authors.forename: B L
authors.initials: BL
authors.lastname: Werner
authors.forename: F M
authors.initials: FM
authors.lastname: Khan
authors.forename: S C
authors.initials: SC
authors.lastname: Sharma
authors.forename: C K
authors.initials: CK
authors.lastname: Lee
authors.forename: T H
authors.initials: TH
authors.lastname: Kim
mesh_terms: D002528:Cerebellar Neoplasms / Q000532:radiotherapy*; D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D006801:Humans; D008527:Medulloblastoma / Q000532:radiotherapy*; D008961:Models, Structural; D011867:Radioisotope Teletherapy; D011880:Radiotherapy Planning, Computer-Assisted; D013679:Technology, Radiologic; D013819:Thermoluminescent Dosimetry
chemical_list: D003037:Cobalt Radioisotopes