Film Dosimetry
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. RADIATION EXPOSURE DURING SPINE SURGERY USING C-ARM FLUOROSCOPY
RESUMO Objetivo: Avaliar a dose de radiação recebida pela equipe cirúrgica em cirurgias de coluna, incluindo entre aqueles que não são considerados trabalhadores com exposição ocupacional. Método: Todas as cirurgias de coluna realizadas num mesmo departamento num período de 12 meses foram avaliadas quanto à exposição dos cirurgiões, enfermeiro
Acta ortop. bras.. Publicado em: 2019-02
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2. Study on patient dosimetry and image quality in digital mammography
Abstract Introduction Digital mammography present many advantages in comparison to conventional mammography, such as high dynamic range and the post-processing of acquired images. One problem is that protocols may not be optimized, resulting in higher absorbed doses to patients. The objective of this work is to evaluate image quality and to estimate mean gl
Res. Biomed. Eng.. Publicado em: 2017-06
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3. Programa de controle da qualidade dosimétrico, validado com auxílio de filme radiocrômico, aplicado à radioterapia estereotáxica / Dosimetric quality assurance with the help of the radiochromic film, applied to stereotactic radiotherapy.
Radiation therapy of brain lesions near critical structures requires a highly accurate location and dose. The accuracy in dose delivery should be accompanied by an accurate quality control in devices involving the practice. The commissioning of the planning system is to ascertain and confirm the calculations performed by the system, but even with all quality
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/03/2012
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4. AplicaÃÃo da citogenÃtica na avaliaÃÃo da radioproteÃÃo de traumatologistas do Recife / Application of cytogenetics for evaluating radioprotection conditions of traumatologists in Recife
Among the activities involving the application of ionizing radiation in medicine, fluoroscopic procedures correspond to the major source of irradiation to doctors. Fluoroscopy consists of X-ray equipment coupled with an image intensifier. This methodology permits a real time visualization of interior of the patientâs body during a surgery. A recent study pe
Publicado em: 2006
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5. FabricaÃÃo e caracterizaÃÃo elÃtrica de heterojunÃÃes de polianilina-silÃcio para aplicaÃÃo em dosimetria de radiaÃÃo gama
In this work a technique has been developed to fabricate high quality polyanilinesilicon heterojunction diodes for use as gas and/or ionizing radiation sensors. Polyaniline thin films (40 nm thick) produced by spin-coating on silicon substrates, were the active part of the junction structure. The devices presented excellent reproducibility of their electrica
Publicado em: 2004
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6. SupressÃo seletiva da luminescÃncia de nanofilmes de complexos de lantanÃdeos induzida por radiaÃÃo UV - n-domo: um dosÃmetro molecular
In this work we have developed a new product, a molecular nanofilm, with photonic properties, from which we have developed a dosimetric device for UV radiation, characterized by its unique behaviour, as well as by its selectivity, sensitivity and compactability. The active part of the dosimeter, so called âMolecular Nanodosimetersâ, is composed of a lumine
Publicado em: 2003
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7. Experimental determination of radiation dose distribution in an heterogeneous medium, irradiated with clinical beams of x and gamma rays / Determinação experimental da distribuição de dose de radiação em meio heterôgenio, irradiado por raios-x e gama radioterápicos
An experimental study of the perturbation caused by a cylindrical inhomogeneity of aluminium on dose distribution in a water phantom, irradiated by high energy photons used in radiation therapy, was performed, employing radiographic film as dosimeter. With these materials we intended to simulate the interface between bone and muscular tissue. The film was pl
Publicado em: 1989
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8. Experimental determination of radiation dose distribution in an heterogeneous medium, irradiated with clinical beams of x and gamma rays. / Estados de impureza em poços quânticos de GaAs-Ga1-xAlxAs
The mass-effective equation is used in order to calculate the intra and inter-subband transition energies in the Quantum Wett structures. The electronic screening of the shallow donor impurity is inclued in the RPR method and the energies are found through variational formalism. The binding energies are calcutated as function of the electronic density and im
Publicado em: 1989
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9. Desenvolvimento de um sistema postal para controle de qualidade de dosimetrias realizadas em feixes de fotons produzidos em aceleradores lineares de uso clinico
There are a great number of parameters involved in the performance of a clinical linear accelerator. These parameters must be verified periodically to eliminate errors in the treatment performed. Such verifications are usually made by clinical physicists with special equipment?s. With the intent of helping and optimizing the physicists work, the organization
Publicado em: 1984
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10. Quantitative megavoltage radiation therapy dosimetry using the storage phosphor KCl:Eu2+
This work, for the first time, reports the use of europium doped potassium chloride (KCl:Eu2+) storage phosphor for quantitative megavoltage radiation therapy dosimetry. In principle, KCl:Eu2+ functions using the same photostimulatated luminescence (PSL) mechanism as commercially available BaFBr0.85I0.15:Eu2+ material that is used for computed radiography (C
American Association of Physicists in Medicine.
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11. Radiation-induced chromosome damage in human lymphocytes
ABSTRACT Analysis for chromosome aberrations in human peripheral blood lymphocytes has been developed as an indicator of dose from ionising radiation. This paper outlines the mechanism of production of aberrations, the technique for their analysis and the dose-effect relationships for various types of radiation. During the past ten years the National Radiolo
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12. Use of a remotely controlled mechanical pump for coronary arteriography: a study of radiation exposure and quality implications.
BACKGROUND--Exposure to radiation is a hazard of invasive cardiology. To minimise the risk it is essential to keep the doses received as low as possible. AIM--To assess the effect on cardiologist radiation exposure and the quality of coronary artery opacification of the use of a remotely controlled mechanical pump for coronary arteriography. A secondary aim