title: [High dose rate brachytherapy].
abstract: The high dose rate brachytherapy uses a single source os 192Ir with 10Ci of nominal activity in a remote afterloading machine. This technique allows an outpatient treatment, without the inconveniences of the conventional low dose rate brachytherapy such as use of general anesthesia, rhachianesthesia, prolonged immobilization, and personal exposition to radiation. The radiotherapy department is now studying 5 basic treatment schemes concerning carcinomas of the uterine cervix, endometrium, lung, esophagus and central nervous system tumors. With the Micro Selectron HDR, 257 treatment sessions were done in 90 patients. Mostly were treated with weekly fractions, receiving a total of three to four treatments each. No complications were observed neither during nor after the procedure. Doses, fraction and ideal associations still have to be studied, so that a higher therapeutic ratio can be reached.
authors.affiliation: Servico de Radioterapia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo.
authors.forename: S
authors.initials: S
authors.lastname: Aisen
authors.forename: H A
authors.initials: HA
authors.lastname: Carvalho
authors.forename: M C
authors.initials: MC
authors.lastname: Chavantes
authors.forename: S C
authors.initials: SC
authors.lastname: Esteves
authors.forename: C M
authors.initials: CM
authors.lastname: Haddad
authors.forename: A C
authors.initials: AC
authors.lastname: Permonian
authors.forename: M do C
authors.initials: Mdo C
authors.lastname: Taier
authors.forename: R C
authors.initials: RC
authors.lastname: Marinheiro
authors.forename: C V
authors.initials: CV
authors.lastname: Feriancic
mesh_terms: D001918:Brachytherapy / Q000295:instrumentation / Q000379:methods*; D016543:Central Nervous System Neoplasms / Q000532:radiotherapy; D016889:Endometrial Neoplasms / Q000532:radiotherapy; D004938:Esophageal Neoplasms / Q000532:radiotherapy; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000532:radiotherapy; D008297:Male; D009369:Neoplasms / Q000532:radiotherapy*; D011879:Radiotherapy Dosage; D013997:Time Factors; D002583:Uterine Cervical Neoplasms / Q000532:radiotherapy
vernacular_title: Braquiterapia de alta taxa de dose.