RESUMO
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.
Assuntos
Braquiterapia/métodos , Neoplasias/radioterapia , Braquiterapia/instrumentação , Neoplasias do Sistema Nervoso Central/radioterapia , Neoplasias do Endométrio/radioterapia , Neoplasias Esofágicas/radioterapia , Feminino , Humanos , Neoplasias Pulmonares/radioterapia , Masculino , Dosagem Radioterapêutica , Fatores de Tempo , Neoplasias do Colo do Útero/radioterapiaRESUMO
Since March 1983 we are attempting for the first time in Brazil to develop improvements on stereotactic radiosurgery techniques. We have been using the multifocal irradiation method attaching to this purpose the Barcia IV stereotactic frame to a 4 MV linear accelerator. We show details about the centralisation technique and the security patterns in our system. From October 1983 to November 1986, 25 patients with arteriovenous malformations of the brain were submitted to a radiosurgery treatment in our service. Good results obtained on the follow-up from one to three years are analysed.
