Andrea Rueda

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Resolution in Magnetic Resonance (MR) is limited by diverse physical, technological and economical considerations. In conventional medical practice, resolution enhancement is usually performed with bicubic or B-spline interpolations, strongly affecting the accuracy of subsequent processing steps such as segmentation or registration. This paper presents a(More)
In magnetic resonance imaging (MRI), accuracy and precision with which brain structures may be quantified are frequently affected by the partial volume (PV) effect. PV is due to the limited spatial resolution of MRI compared to the size of anatomical structures. Accurate classification of mixed voxels and correct estimation of the proportion of each pure(More)
Magnetic resonance (MR) provides a non-invasive way to investigate changes in the brain resulting from aging or neurodegenerative disorders such as Alzheimer's disease (AD). Performing accurate analysis for population studies is challenging because of the interindividual anatomical variability. A large set of tools is found to perform studies of brain(More)
In magnetic resonance imaging (MRI), accuracy of brain structures quantification may be affected by the partial volume (PV) effect. PV is due to the limited spatial resolution of MRI compared to the size of anatomical structures. When considering the cortex, measurements can be even more difficult as it spans only a few voxels. In tight sulci areas, where(More)
Deformable registration of cortical surfaces facilitates longitudinal and intergroup comparisons of cortical structure and function in the study of many neurodegenerative diseases. Non-rigid cortical matching is a challenging task due to the large variability between individuals and the complexity of the cortex. We present a new framework for computing(More)
Neurodegenerative diseases comprise a wide variety of mental symptoms whose evolution is not directly related to the visual analysis made by radiologists, who can hardly quantify systematic differences. Moreover, automatic brain morphometric analyses, that do perform this quantification, contribute very little to the comprehension of the disease, i.e., many(More)
This paper presents a semi-automatic segmentation method to extract the liver volume from CT scans, based on discrete deformable surfaces with both a priori shape and intensity information. A shape model of the liver, represented as a triangular mesh, is built and is manually located in the region of interest, to be iteratively deformed in function of the(More)
Researchers have identified at least twenty-five pathogens that can be transmitted through blood transfusions. Four percent of patients who receive the average amount of blood during a transfusion are at risk of being infected with a contaminated unit, and exposed to the danger of serious adverse reactions, including future debilitating conditions. Victims(More)
TCT-321 Definite and probable stent thrombosis after revascularization with drug-eluting stents with a biodegradable polymer. From the randomized SORT OUT VII Trial Lisette Okkels Jensen, Michael Maeng, Bent Raungaard, Knud Noerregaard Hansen, Johnny Kahlert, Svend Eggert Jensen, Hans Erik Bøtker, Henrik Hansen, Jens Flensted Lassen, Evald Christiansen(More)