Rui M. Duarte

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INTRODUCTION Spinal infection is a rare pathology although a concerning rising incidence has been observed in recent years. This increase might reflect a progressively more susceptible population but also the availability of increased diagnostic accuracy. Yet, even with improved diagnosis tools and procedures, the delay in diagnosis remains an important(More)
Many image-based systems for aiding the surgeon during minimally invasive surgery require the endoscopic camera to be calibrated at all times. This article proposes a method for accomplishing this goal whenever the camera has optical zoom and the focal length changes during the procedure. Our solution for online calibration builds on recent developments in(More)
BACKGROUND Treatment for Freiberg disease has been largely conservative despite availability of various operative options for severe or refractory cases. The aim of this study was to evaluate the long-term results of pediatric patients with symptomatic Freiberg disease treated with intra-articular dorsal wedge osteotomy. METHODS Pediatric patients treated(More)
INTRODUCTION Portugal has had a high rate of forest fires in recent years. Inhaled wood smoke can have short- and long-term effects on the lung function of people exposed to it. STUDY OBJECTIVES To assess the lung function of active wildland (forest) firefighters. METHODS Cross-sectional study. A self-questionnaire on personal and work habits was used(More)
The present research evaluated the influence of a chayotte (Sechium edule) extract (macerated) on the bioavailability of 99TcO4Na as well as in the mass of the organs. In this study, in the biodistribution analysis, the 99mTcO4Na was administrated into female Wistar rats (diabetes and no diabetes induced) which had drunk or not the extract for 7 days. After(More)
Management of degenerative spine pathologies frequently leads to the need for spinal fusion, where bone growth is induced towards stabilization of the interventioned spine. Autologous bone graft (ABG) remains the gold standard inducer, while new bone graft substitutes attempt to achieve effective de novo bone formation and solid fusion. Limited fusion(More)
The use of natural products as medicines has been growing in the entire world. There are concerns that these products may contain potentially toxic ingredients and contaminants such as heavy metals. The labeling of blood constituents with technetium-99m has been influenced by the presence of natural extracts. We evaluated the influence of a chayotte(More)
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