Browsing by Subject "Tomography"
Now showing items 1-20 of 64
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100 GHz MST retina for real time near field imaging
(Universitat Politècnica de Catalunya, 2012-06-26)
Master thesis
Open Access[ANGLÈS] For an imaging system, a good compromise is needed between the resolution of the image and the penetration ability of the electromagnetic wave. In order to obtain a good resolution, a high frequency system is ... -
3D UWB tomography for medical imaging applications
(2010)
Conference report
Open AccessIn this paper, a novel 3D UWB tomographic algorithm has been presented for brain hemorrhagic stroke detection. While 2D reconstructions are unable to distinguish between features at different heights, 3D reconstructions ... -
A cylindrical array for fast microwave tomography
(Unión Científica Internacional de Radio (URSI), 1987)
Conference report
Open Access -
A fuzzy approach for feature extraction of brain tissues in Non-Contrast CT
(2018)
Article
Open Access -
A new method for ionospheric tomography and its assessment by ionosonde electron density, GPS TEC, and single-frequency PPP
(Institute of Electrical and Electronics Engineers (IEEE), 2019-01-05)
Article
Open AccessA new tomographic method was developed with the main goal of mapping the ionosphere in the region of Brazil. The ionospheric background was estimated based on ionosonde and radio-occultation measurements to overcome the ... -
Active microwave sensing of highly contrasted dielectric bodies
(1993-11)
Article
Restricted access - publisher's policyIn this work the active tomographic imaging of biological bodies which exhibits a high dielectric contrast is studied. Two approaches based on the Born approximation are presented: a differential reconstruction method which ... -
Algoritmos de tomografía de microondas para objetos de alto contrastre
(Universidad Politécnica de Madrid (UPM), 1988)
Conference report
Open AccessConventional first order algorithms used in microwave tomography often fail to reconstruct biological bodies due to their high contrast in permittivity. The paper presents several methods to improve the applicability of ... -
Analysis of bone cement distribution around fenestrated pedicle screws in low bone quality lumbosacral vertebrae
(2018-01-01)
Article
Open Access -
Anàlisis simplificat de la mecànica d’impacte de blocs i de la seva influència en la fragmentació
(Universitat Politècnica de Catalunya, 2019-09-30)
Bachelor thesis
Open AccessEls despreniments rocosos són un gran problema per les infraestructures, els béns i la pròpia vida de les persones. Aquest fenomen ha sigut estudiat en gran mesura, però les seves particularitats el fan ser una de les ... -
Cat scanner as a tool for geotechnical sample inspection
(Universitat Politècnica de Catalunya, 2013-11-22)
Master thesis
Open AccessX-ray computed tomography (CT) provides nondestructive three-dimensional visualization and characterization, creating images that map the variation of X-ray attenuation within objects, which relates closely to bulk ... -
Characterization of pharmaceuticals using Terahertz Time Domain spectral-tomography
(IEEE, 2013)
Conference report
Restricted access - publisher's policyIn this paper a Terahertz T ime-Domain measurement system has been used to perform Tomographic imaging of pharmaceutical compounds with coating. Measurements on paracetamol and ibuprofene samples are done both in ... -
Correlació entre el camp visual i la tomografia de coherència òptica en pacients amb glaucoma crònic de angle obert.
(Universitat Politècnica de Catalunya, 2015-06-30)
Bachelor thesis
Open AccessEl objetivo del presente trabajo es estudiar si existe congruencia entre la afectación estructural y funcional en pacientes con glaucoma crónico de ángulo abierto. En nuestro trabajo, se estudia la correlación entre la ... -
Detección de anomalías 2D por un método de inversión tomográfica por mínima dispersión
(Universitat Politècnica de Catalunya, 2007)
Article
Open AccessExisten numerosos métodos de inversión por la técnica de tomografía en tiempo de viaje. En este trabajo se desarrolló un procedimiento original para la determinación de anomalías convexas, homogéneas e isotrópicas en un ... -
Detección mediante la Tomografía de Coherencia Óptica de los cambios en las capas de la retina en pacientes con neuropatía óptica isquémica
(Universitat Politècnica de Catalunya, 2016-10-13)
Master thesis
Open AccessIntroducció. La tomografia de coherència òptica (OCT) s'ha transformat en un pilar molt important per a l'avaluació de la integritat axonal/neuronal en el diagnòstic, així com l'estudi de la progressió de diferents ... -
Determination of shape and sphericity of silicon quantum dots imaged by EFTEM-tomography
(2017-11-06)
Article
Open AccessThe shape of size-controlled silicon nanocrystals (Si NCs) embedded in SiO2 is investigated by tomographic energy-filtered transmission electron microscopy (EFTEM). The sphericity of the quantum dots is determined by ... -
Development of a tool for a 2-phase flow Electrical Resistance Tomography image reconstruction and analysis
(Universitat Politècnica de Catalunya, 2018-06-15)
Master thesis
Open Access
Covenantee: České vysoké učení technické v PrazeThe work is based on the research on two-phase flows in pressurized pipes with non-Newtonian fluids. Experiments are carried out in a pipe loop at the Water Engineering Laboratory (WEL) of the Czech Technical University ... -
Disseny d'un sistema de tomografia d'impedància elèctrica basat en l'AFE4300
(Universitat Politècnica de Catalunya, 2017-06)
Bachelor thesis
Open AccessA prototype of a minimal electrical impedance tomography system is designed and manufactured to allow independent measurements of impedance with autonomous battery power and remotely controlled with Bluetooth from another ... -
Disseny i implementació d’un equip de tomografia d’impedància elèctrica
(Universitat Politècnica de Catalunya, 2010-02)
Master thesis
Open Access -
Effect of high-flow nasal cannula and body position on end-expiratory lung volume: A cohort study using electrical impedance tomography
(2013-04-01)
Article
Open Access: Electrical impedance tomography measures changes in lung impedance, which are mainly related to changes in lung volume. We used electrical impedance tomography to inves- tigate the effects of high-flow nasal cannula ... -
Effect of oblique X-ray incidence in flat-panel computed tomography of the Breast
(2009)
Article
Open AccessWe quantify the variation in resolution due to anisotropy caused by oblique X-ray incidence in indirect flat-panel detectors for computed tomography breast imaging systems. We consider a geometry and detector type ...
