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Learner’s satisfaction within a breast imaging eLearning course for radiographers

Background: An asynchronous eLearning system was developed for radiographers in order to promote a better knowledge about senology and mammography. Objectives: to assess the learners’ satisfaction. Methods: Target population included radiographers and radiogr aphy students, in order to assess eLearning satisfaction according to different experience levels in breast imaging. Satisfaction was measured through a q...

A utilização da ressonância magnética na caracterização funcional da fala

Documento confidencial. Não pode ser disponibilizado para consulta ; Tese de Programa Doutoral. Engenharia Biomédica. Universidade do Porto. Faculdade de Engenharia. 2012

Three-dimensional visualization of teeth by magnetic resonance imaging during s...

Requisitos e condicionantes da imagem por ressonância magnética no estudo da fa...

A produção da fala tem suscitado o interesse crescente da comunidade científica e, em particular, da Engenharia, pela necessidade de obter modelos do tracto vocal para a concepção de sistemas de síntese, reconhecimento e codificação da fala. A obtenção de imagens seccionais da anatomia do tracto vocal é um recurso essencial para a obtenção de modelos físicos morfológico - dinâmicos. O desenvolvimento da imagem ...

Speech articulation assessment using dynamic magnetic resonance imaging techniques

Magnetic Resonance Imaging (MRI) has been successfully applied on real-time analysis of the articulators during speech production along the whole vocal tract, with good signal-to-noise ratio and without ionizing effects. Because speech dynamic events need a minimal sampling rate, an improvement on the temporal resolution of MRI systems is demanded. Our aim is to describe a dynamic MRI technique to acquire and ...

Radiographic outcomes and evaluation of developmental dysplasia of the hip in c...

The Developmental Dysplasia of the Hip (DDH), also know as Congenital Dislocation of the Hip, is common in infants and children and may persist into adulthood. The radiographic interpretation is highly conditioned by appropriate patient positioning and image quality criteria. The main goal of this study is to demonstrate the value of radiographic evaluation of DDH. Through the retrospective analysis of 65 radio...

The use and relevance of gonad protection shields in children during hips radio...

Considering that ionizing radiation effects are cumulative and the gonads are particularly sensitive to these effects, and also the clinical importance of pelvic radiographs in children, the excess of radiation exposure to the gonads must be avoided. The purpose of this study is to demonstrate the relevance of the correct use of gonad protection shields and to evaluate their use on the hip radiographs performed...

Modelling and segmentation of the vocal tract during speech production by using...

The first and second authors would like to thank the support of the PhD grants with references SFRH/BD/28817/2006 and SFRH/PROTEC/49517/2009, respectively, from Fundação para a Ciência e Tecnol ogia (FCT). This work was partially done in the scope of the project “Methodologies to Analyze Organs from Complex Medical Images – Applications to Fema le Pelvic Cavity”, wi th reference PTDC/EEA- CRO/103320/2008, finan...

Magnetic resonance imaging of the vocal tract: techniques and applications

Magnetic resonance (MR) imaging has been used to analyse and evaluate the vocal tract shape through different techniques and with promising results in several fields. Our purpose is to demonstrate the relevance of MR and image processing for the vocal tract study. The extraction of contours of the air cavities allowed the set - up of a number of 3D reconstruction image stacks by means of the combination of orth...

Analysis of tongue shape and motion in speech production using statistical mode...

The mechanisms of speech production are complex and have been raising attention from researchers of both medical and computer vision fields. In the speech production mechanism, the articulator’s study is a complex issue, since they have a high level of freedom along this process, namely the tongue, which instigates a problem in its control and observation. In this work it is automatically characterized the tong...