Encontrados 35 documentos, a visualizar página 1 de 4
Automated image analysis of lung branching morphogenesis from microscopic image...
Rodrigues, Pedro L.; Rodrigues, Nuno F.; Duque, Duarte; Granja, Sara; Correia-Pinto, Jorge; Vilaça, João L.Background: Regulating mechanisms of branching morphogenesis of fetal lung rat explants have been an essential tool for molecular research. This work presents a new methodology to accurately quantify the epithelial, outer contour and peripheral airway buds of lung explants during cellular development from microscopic images. Methods: The outer contour was defined using an adaptive and multi-scale threshold algo...
Automatic modeling of pectus excavatum corrective prosthesis using artificial n...
Rodrigues, Pedro L.; Rodrigues, Nuno F.; Pinho, ACM; Fonseca, Jaime C.; Correia-Pinto, Jorge; Vilaça, João L.Pectus excavatum is the most common deformity of the thorax. Pre-operative diagnosis usually includes Computed Tomography (CT) to successfully employ a thoracic prosthesis for anterior chest wall remodeling. Aiming at the elimination of radiation exposure, this paper presents a novel methodology for the replacement of CT by a 3D laser scanner (radiation-free) for prosthesis modeling. The complete elimination of...
Automatic prebent customized prosthesis for pectus excavatum minimally invasive...
Vilaça, João L.; Rodrigues, Pedro L.; Soares, Tony R.; Fonseca, Jaime; Pinho, ACM; Henriques-Coelho, Tiago; Correia-Pinto, JorgePectus excavatum is the most common deformity of the thorax. A minimally invasive surgical correction is commonly carried out to remodel the anterior chest wall by using an intrathoracic convex prosthesis in the substernal position. The process of prosthesis modeling and bending still remains an area of improvement. The authors developed a new system, i3DExcavatum, which can automatically model and bend the bar...
Application to quantify fetal lung branching on rat explants
Rodrigues, Pedro L.; Granja, Sara; Moreira, António; F. Rodrigues, Nuno; Vilaça, João L.Recently, regulating mechanisms of branching morphogenesis of fetal lung rat explants have been an essential tool for molecular research. The development of accurate and reliable segmentation techniques may be essential to improve research outcomes. This work presents an image processing method to measure the perimeter and area of lung branches on fetal rat explants. The algorithm starts by reducing the noise c...
Assessment of 3D scanners for modeling Pectus Carinatum corrective bar
Moreira, António H. J.; Fonseca, João Gomes; Rodrigues, Pedro L.; Fonseca, Jaime C.; Pinho, A.C.M.; Correia-Pinto, Jorge; F. Rodrigues, NunoPectus Carinatum (PC) is a chest deformity consisting on the anterior protrusion of the sternum and adjacent costal cartilages. Non-operative corrections, such as the orthotic compression brace, require previous information of the patient chest surface, to improve the overall brace fit. This paper focuses on the validation of the Kinect scanner for the modelling of an orthotic compression brace for the correcti...
Variations of the soft tissue thicknesses external to the ribs in Pectus Excava...
Rodrigues, Pedro L.; Direito-Santos, Bruno; Moreira, António H. J.; Fonseca, Jaime C.; Pinho, A.C.M.; F. Rodrigues, Nuno; Henriques-Coelho, TiagoBackground: Surgical repair of pectus excavatum (PE) has become more popular due to improvements in the minimally invasive Nuss procedure. The pre-surgical assessment of PE patients requires Computerized Tomography (CT), as the malformation characteristics vary from patient to patient. Objective: This work aims to characterize soft tissue thickness (STT) external to the ribs among PE patients. It also presents ...
Kidney targeting and puncturing during percutaneous nephrolithotomy: recent adv...
Rodrigues, Pedro L.; F. Rodrigues, Nuno; Fonseca, Jaime; Lima, Estevão; Vilaça, João L.Background and Purpose: Precise needle puncture of the kidney is a challenging and essential step for successful percutaneous nephrolithotomy (PCNL). Many devices and surgical techniques have been developed to easily achieve suitable renal access. This article presents a critical review to address the methodologies and techniques for conducting kidney targeting and the puncture step during PCNL. Based on this s...
Collecting system percutaneous access using real-time tracking sensors: first p...
Rodrigues, Pedro L.; Vilaça, João L.; Oliveira, Carlos; António, Cicione; Rassweiler, Jens; Fonseca, Jaime; F. Rodrigues, Nuno; Correia-Pinto, JorgePurpose: Precise needle puncture of the renal collecting system is an essential but challenging step for successful percutaneous nephrolithotomy. We evaluated the efficiency of a new real-time electromagnetic tracking system for in vivo kidney puncture. Materials and Methods: Six anesthetized female pigs underwent ureterorenoscopy to place a catheter with an electromagnetic tracking sensor into the desired punc...
Automatic prebent customized prosthesis for pectus excavatum minimally invasive...
Vilaça, João L.; Rodrigues, Pedro L.; Soares, Tony R.; Fonseca, Jaime C.; Pinho, António C.M.; Henriques-Coelho, Tiago; Correia-Pinto, JorgePectus excavatum is the most common deformity of the thorax. A minimally invasive surgical correction is commonly carried out to remodel the anterior chest wall by using an intrathoracic convex prosthesis in the substernal position. The process of prosthesis modeling and bending still remains an area of improvement. The authors developed a new system, i3DExcavatum, which can automatically model and bend the bar...
Finite element analysis of pectus carinatum surgical correction via a minimally...
Neves, Sara C.; Pinho, António C.M.; Fonseca, Jaime C.; F. Rodrigues, Nuno; Henriques-Coelho, Tiago; Correia-Pinto, Jorge; Vilaça, João L.Pectus carinatum (PC) is a chest deformity caused by a disproportionate growth of the costal cartilages compared to the bony thoracic skeleton, pulling the sternum towards, which leads to its protrusion. There has been a growing interest on using the ‘reversed Nuss’ technique as minimally invasive procedure for PC surgical correction. A corrective bar is introduced between the skin and the thoracic cage and pos...
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