title: A simple method for indirectly verifying noncoplanar treatment fields in radiotherapy.
abstract: The use of a vertex field can be a practical technique for treatment of pituitary and brain tumors. This approach may be underutilized, primarily because of the difficulty in documenting noncoplanar treatment fields. This paper describes a method for documenting vertex treatment fields by inference using portal films. This method is relatively simple to implement, yet yields accurate results.
authors: Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
authors: K Y
authors: KY
authors: Orr
authors: R W
authors: RW
authors: Miller
authors: N
authors: N
authors: Wersto
authors: E
authors: E
authors: Glatstein
mesh_terms: D001932:Brain Neoplasms / Q000532:radiotherapy; D006801:Humans; D010911:Pituitary Neoplasms / Q000532:radiotherapy; D011878:Radiotherapy / Q000379:methods*