5 documents found, page 1 of 1
A multicenter validation of an endoscopic classification with narrow band imagi...
Pimentel-Nunes, P; Dinis-Ribeiro, M; Soares, JB; Marcos-Pinto, R; Santos, C; Rolanda, C; Bastos, RP; Areia, M; Afonso, L; Bergman, J; Sharma, PBACKGROUND AND STUDY AIM: The reliability and external validity of narrow band imaging (NBI) in the stomach have not been described consistently. The aim of the current study was to describe and estimate the accuracy and reliability of a simplified classification system for NBI in the diagnosis of gastric lesions. METHODS: Consecutive patients undergoing NBI endoscopy at two reference centers (n=85, 33% with dy...
Segmentation for Classification of Gastroenterology Images
Coimbra, M; Riaz, F; Areia, M; Baldaque Silva, FB; Dinis Ribeiro, MAutomatic classification of cancer lesions in tissues observed using gastroenterology imaging is a non-trivial pattern recognition task involving filtering, segmentation, feature extraction and classification. In this paper we measure the impact of a variety of segmentation algorithms (mean shift, normalized cuts, level-sets) on the automatic classification performance of gastric tissue into three classes: canc...
Fulminant hepatic failure: a Portuguese experience
Areia, M; Romãozinho, JM; Ferreira, M; Amaro, P; Leitão, MBACKGROUND: Fulminant hepatic failure (FHF) is a rare condition. Several series have been reported either by individual centres or in multicentre studies but, to our knowledge, this is the first report from a Portuguese population and might be a good example of FHF cases in a SouthWestern European population. AIMS: To present the experience in FHF of a Portuguese Hepatogastroenterological Intensive Care Unit. M...
Spontaneous extensive esophageal tear with upper digestive haemorrhage treated ...
Areia, M; Amaro, P; Figueiredo, P; Portela, F; Ferreira, M; Rosa, A; Romãozinho, JM
"Downhill" varices. A rare cause of esophageal hemorrhage
Areia, M; Romãozinho, JM; Ferreira, M; Amaro, P; Freitas, D"Downhill" varices or upper esophageal varices are a rare cause of proximal digestive tract hemorrhage with only 16 cases described in the literature. In our series, hemorrhage due to "downhill" varices represents 0.1% of all acute esophageal variceal bleeding. Their etiology differs from that of the usual "uphill" varices secondary to portal hypertension, and the clinical management should be directed to vascu...