Results 41 to 50 of about 2,489 (165)
Exposure computational models with voxel phantoms coupled to EGSnrc Monte Carlo code
Brazilian Journal of Radiation Sciences, 2023 In computational dosimetry of ionizing radiation, the energy deposited in radiosensitive organs and tissues is evaluated when an anthropomorphic simulator (phantom) is irradiated using Exposure Computational Models (ECMs).
José Wilson Vieira +13 more
doaj +1 more source
Detecção de Fraturas Ósseas em Fantomas por Espectroscopia de Impedância
Revista Brasileira de Física Médica, 2021 A maioria das técnicas de diagnóstico por imagem para detecção de fraturas ósseas utiliza equipamentos que emitem radiação, que pode ser prejudicial à saúde humana, mesmo em pequenas doses. Sem dúvida, estudos são necessários e novas técnicas que busquem a redução dessas exposições ao raio-x.
Giovanni Gueler Dalvi +1 more
openaire +2 more sources
Construção de um Fantoma Físico para Controle de Qualidade de Imagens de Radiografia Digital
Brazilian Journal of Radiation Sciences, 2015 RESUMO O avanço da tecnologia nos últimos anos tem proporcionado à produção de aparelhos cada vez mais sofisticados, objetivando com isso obter imagens médicas com alto nível técnico e também facilitar a operacionalidade dos equipamentos.
Tayline Tyene dos Santos
doaj +1 more source
Simulaciones Monte Carlo para el desarrollo de un prototipo de tomógrafo de protones con aplicación en protonterapia [PDF]
, 2019 El objetivo de este trabajo es demostrar la viabilidad de obtener imágenes médicas con protones, utilizando detectores de Silicio multisegmentados y una agrupaci on de 4 detectores de centelleo de alta resolución.
García Távora, Vicente
core
Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
, 2010 We propose a semi-classical model for femtosecond-laser induced demagnetization due to spin-polarized excited electron diffusion in the super-diffusive regime. Our approach treats the finite elapsed time and transport in space between multiple electronic
Battiato, Marco +2 more
core +1 more source
Brazilian Archives of Biology and Technology, 2006 External morphological distinction between young Selene vomer and S. brownii (Carangidae) was studied using multivariate analysis with the purpose to evaluate if other characters than the second dorsal and pelvic fin spines could be used as ...
José de Melo Lima Filho +4 more
doaj +1 more source
Development of anthropomorphic computational phantoms at the UFPE
Brazilian Journal of Radiation Sciences, 2023 To evaluate the amount of energy deposited in radiosensitive organs and tissues of the human body, when an anthropomorphic phantom is irradiated, researchers in numerical dosimetry use the so-called exposure computational models (ECMs).
José Wilson Vieira +10 more
doaj +1 more source
Enhancement of photoacoustic detection of inhomogeneities in polymers [PDF]
, 2013 We report a series of experiments on laser pulsed photoacoustic excitationin turbid polymer samples addressed to evaluate the sound speed in the samples and the presence of inhomogeneities in the bulk.
Bilmes, G. M. +5 more
core +6 more sources
, 2012 By means of density functional theory (DFT) and the generalized gradient approximation (GGA) we present a structural, electronic and magnetic study of FePt, CoPt, FeAu and FePd based L1$_0$ ordered cuboctahedral nanoparticles, with total numbers of atoms,
Chantrell, R. W., Cuadrado, R.
core +1 more source
Izrada fantoma za mamografiju [PDF]
, 2019 Trenutno na tržištu postoji mnogo fantoma, ali je vrlo teško naći jedan koji uistinu mo že predstavljati tijelo pacijenta, koji nije jako skup ili s kojim je jednostavno rukovati. Ovaj rad predstavlja početak projekta čiji je cilj osmisliti realističan fantom grudi koristeći jeftine materijale.
Justić, Mihaela +3 more
openaire +1 more source