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- Morphological Dynamic Study of Human Vocal TractPublication . Ventura, Sandra Rua; Freitas, Diamantino RuiMagnetic resonance imaging (MRI) has been successfully used in speech research, with the development of high B-value units and ultra-fast acquisition sequences, to obtain morphological and dynamic data of the vocal tract. This knowledge is useful for the understanding of speech mechanisms and can, in particular be employed for speech synthesis. The aim of our study was a combination of the morphological and dynamical characterizations of speech, resulting in the production of 3D articulatory models of some relevant Portuguese sounds and syllables. A set of static images in stacks and dynamic sequences were collected during the experiments from subjects that were instructed to vocalize during the acquisition, exploring the capabilities of the equipment. Analysis of the image stacks allowed the extraction of the vocal tract contours and a subsequent non-conventional 3D reconstruction by means of combination of orthogonal stacks allowed visualization and partial measurement of the sampled vocal tract shape.
- Principal hazards and health effects of magnetic resonance imagingPublication . Silva, Vitor M. Fonseca; Ventura, Sandra Rua
- Toward Dynamic Magnetic Resonance Imaging of the Vocal Tract During Speech ProductionPublication . Ventura, Sandra Rua; Freitas, Diamantino Rui S.; Tavares, João Manuel R.S.The most recent and significant magnetic resonance imaging (MRI) improvements allow for the visualization of the vocal tract during speech production, which has been revealed to be a powerful tool in dynamic speech research. However, a synchronization technique with enhanced temporal resolution is still required.
- Fundamentos teóricosPublication . Ventura, Sandra RuaA 8 de novembro de 1895, o físico alemão Wilhelm Conrad Roentgen revolucionou a história da Medicina e do mundo, aquando da descoberta acidental da radiação X no seu laboratório, na Universidade de Wurzburg, Alemanha.
- Learner’s perception, knowledge and behaviour assessment within a breast imaging E-Learning course for radiographersPublication . Moreira, Inês C.; Ramos, Isabel; Ventura, Sandra; Pereira Rodrigues, PedroE-learning has been revealed as an a useful tool among continuing education within health professionals, namely for radiographers or radiologic technologists. Therefore like traditional learning, this teaching approach needs continuous evaluation in order to validate its effectiveness and impact. Kirkpatrick's model has been widely used for this purpose by health information management instructors. Our aim was to assess an E-learning Course on Breast Imaging for radiographers based on the first three levels of Kirkpatrick's framework: reaction, learning and behaviour.
- Standards e Guidelines em RadiologiaPublication . Rodrigues, Anabela; Ventura, Sandra RuaPela diversidade da formação dos técnicos de Radiologia, torna-se útil o recurso a ferramentas próprias e específicas para cada estudo em particular, facilitando a sua realização e possibilitando a obtenção de informação com a qualidade diagnóstica esperada/necessária.
- Preoperative localisation techniques in breast conservative surgery: A systematic review and meta-analysisPublication . Moreira, Inês C.; Ventura, Sandra; Ramos, Isabel; Fougo, José Luís; Rodrigues, Pedro PereiraThe preoperative localisation of non-palpable lesions guided by breast imaging is an important and required procedure for breast-conserving surgery. We conducted a systematic review and meta-analysis of the literature on the comparative impact of different techniques for guided surgical excision of non-palpable breast lesions from reports of clinical or patient-reported outcomes and costs.
- Morphological Dynamic Study of Human Vocal TractPublication . Ventura, Sandra Rua; Freitas, Diamantino RuiWith the development of high B-value units and ultra-fast acquisition sequences, magnetic resonance imaging (MRI) has been successfully used in speech research to obtain morphological and dynamic data of the vocal tract
- Estudo do Stress nos Técnicos de RadiologiaPublication . Videira, Sara; Ventura, Sandra RuaO conceito de stress nem sempre foi consensual, no entanto, vários estudos têm documentado a relevância deste no contexto das diferentes profissões. O stress parece ser particularmente importante quando aplicado aos profissionais de saúde, estes estão frequentemente propensos ao burnout, termo que descreve o estado deexaustão prolongada e diminuição de interesse, especialmente em relação ao trabalho.
- The use and relevance of gonal protection shields in children during hips radiographyPublication . Silva, César; Silva, Pedro N.; Ventura, Sandra RuaConsidering 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 in a reference clinical institution, through the retrospective analysis of pelvic radiographic images performed in children. According the image quality assessment, 20 (40%) patients were unprotected and gonads shields were incorrectly placed in 24 (80%) patients.