Brachytherapy
Mostrando 25-36 de 82 artigos, teses e dissertações.
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25. Characterization of ceramic seeds with samarium-153 for use in brachytherapy
Ceramic seeds were synthesized by the sol-gel technique with Si:Sm:Ca. One sample was irradiated in the TRIGA nuclear reactor IPR-R1. After irradiation, the seeds were submitted to instrumental neutron activation analysis to determine the 153Sm concentration in weight. The same irradiated seed sample was submitted to gamma spectrometry analysis to determine
Materials Research. Publicado em: 25/02/2011
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26. Qualitay of life after open or robotic prostatectomy, cryoablation or brachytherapy for localized prostate cancer
International braz j urol. Publicado em: 2011-02
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27. Automação do processo de soldagem a laser (Nd:YAG) para confecção das sementes de Iodo-125 utilizadas em braquiterapia / Development of an automation system for iodine-125 brachytherapy seed production by (Nd:YAG) laser welding
The aim of this work is to develop an automation system for iodine-125 radioactive seed production by (Nd:YAG) laser welding, which has been used successfully in Low Dose Rate (LDR) brachytherapy treatment. This small seed consists of a welded titanium capsule, with 0.8mm in diameter and 4.5mm in length, containing iodine-125 adsorbed onto a silver rod. The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/09/2010
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28. Recovery of hormone sensitivity after salvage brachytherapy for hormone refractory localized prostate cancer
PURPOSE: Recent work has demonstrated the return of hormone sensitivity after palliative chemotherapy in androgen independent prostate cancer. We wished to establish whether a similar phenomenon existed in patients with no exposure to chemotherapy. MATERIALS AND METHODS: A review of “hormone resistant” patients who had received salvage brachytherapy for
International braz j urol. Publicado em: 2010-06
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29. Resultados da associação de braquiterapia de alta taxa de dose à teleterapia no câncer da próstata / Results of the association of high dose-rate brachytherapy with external beam irradiation in prostate cancer
INTRODUCTION: high dose-rate brachytherapy (HDR) for prostate cancer may be a nice treatment option for dose escalation as a boost, when associated to external beam irradiation, mainly if 3D conformal or more advanced technology is not available. PURPOSE: this study analyzes the results and toxicities of HDR brachytherapy boost prior to external beam radioth
Publicado em: 2010
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30. Urinary side effects and complications after permanent prostate brachytherapy: the MD Anderson Cancer Center experience
International braz j urol. Publicado em: 2009-12
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31. Radioactive seed migration after prostate brachytherapy with Iodine-125 using loose seeds versus stranded seeds
Objectives: To assess the incidence and clinical parameters that could influence migration of seeds in localized prostate cancer patients treated by stranded versus loose sources by Iodine-125 brachytherapy. Material and Methods: 100 patients were treated from January/1998 until December/2006. Age, PSA, clinical stage, Gleason, prostate volume, number of see
International braz j urol. Publicado em: 2009-10
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32. Challenging non-traumatic posterior urethral strictures treated with urethroplasty: a preliminary report
Introduction: Posterior urethral strictures after prostatic radiotherapy or surgery for benign prostatic hyperplasia (BPH) refractory to minimal invasive procedures (dilation and/or endoscopic urethrotomy) are challenging to treat. Published reports of alternative curative management are extremely rare. This is a preliminary report on the treatment of these
International braz j urol. Publicado em: 2009-08
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33. Avaliação da biodegradação de matrizes porosas à base de hidroxiapatita para aplicação como fontes radioativas em braquiterapia
Porous ceramic materials based on calcium phosphate compounds (CPC) have been studied aiming at different biomedical applications such as implants, drug delivery systems and radioactive sources for brachytherapy. Two kinds of hydroxyapatite (HAp) powders and their ceramic bodies were characterized by a combination of different techniques (XRF, BET method, SE
Química Nova. Publicado em: 2009
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34. Adjuvant radiotherapy for IB endometrial cancer : historic comparison between treatment regimens in a same institution / Radioterapia adjuvante no cancer do endometrio IB : comparação historica entre regimes de tratamento em uma mesma instituição
Objectives: To compare the rates of overall survival, disease-free survival and toxicity in different techniques of postoperative radiotherapy for stage IB, histologic grades 1 and 2 endometrial cancer. Methods: A historical comparison between treatments was made, including 133 women diagnosed with stage IB, histologic grades 1 and 3 endometrial endometrioid
Publicado em: 2009
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35. Metodologia para caracterização dosimétrica e curvas de isodoses de fontes de braquiterapia emissoras gama
This work presents a methodology for the dosimetric characterization of 125I brachytherapy sealed sources. Since the dosimetric characterization of a source is an attribution of both the manufacturer and the user, a calibration certificate needs to be provided by the manufacturer to the user - clinical, hospitals and secondary laboratories. It is an obligati
Publicado em: 2009
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36. Estudo comparativo entre métodos de calibração de aplicadores clínicos de radiação beta / COMPARATIVE STUDY AMONG CALIBRATION METHODS OF CLINICAL APPLICATORS OF BETA RADIATION
90Sr+90Y clinical applicators are instruments used in brachytherapy procedures and they have to be periodically calibrated, according to international standards and recommendations. In this work, four calibration methods of dermatological and ophthalmic applicators were studied, comparing the results with those given by the calibration certificates of the ma
Publicado em: 2009