We present the math-aware search engine Tangent-3 and report its results for the NTCIR-12 MathIR task. Tangent uses a federated search over two indices: 1) a TF-IDF textual search engine (Solr), and 2) a query-by-expression engine. We use an inverted index to store math expressions using pairs of symbols extracted from a Symbol Layout Tree representation built from Presentation MathML. We use a...

The most common sellar lesion is the pituitary adenoma, and sellar tumors are approximately 10-15% of all intracranial neoplasms. Manual slice-by-slice segmentation takes quite some time that can be reduced by using the appropriate algorithms. In this contribution, we present a segmentation method for pituitary adenoma. The method is based on an algorithm that we have applied recently to segmen...

Accurate segmentation of breast lesions is a crucial step in evaluating the characteristics of tumors. However, this is a challenging task, since breast lesions have sophisticated shape, topological structure, and variation in the intensity distribution. In this paper, we evaluated the performance of three unsupervised algorithms for the task of breast Magnetic Resonance (MRI) lesion segmentati...

Conceptual Graphs are a very powerful knowledge and meaning representation formalism grounded on deep philosophical, linguistic and object oriented principles [1], [2]. Concerning geographic knowledge representation and matching, the study and analysis of geographic concept definitions plays an important role in deriving systematic knowledge about concepts and comparing geographic categories in...

This document provides a user’s guide for DICE Version 1.0. The emphasis in this user’s guide is on providing detailed specifications for setting up and using the various features in DICE. For a general overview of DICE and descriptions of some of its core features, see Reference [1]. This user’s guide is supplemented by various materials that are available electronically from the DICE User’s G...

Ring theory is one of the branches of the abstract algebra that has been broadly used in images. However, ring theory has not been very related with image segmentation. In this paper, we propose a new index of similarity among images using Zn rings and the entropy function. This new index was applied as a new stopping criterion to the Mean Shift Iterative Algorithm with the goal to reach a bett...

This study reports tympanic cavity (TC) volume in newborns, which was missing in the literature. Ex vivo histology and computerized tomography (CT) scans were performed on temporal bone and data were analyzed in part using software developed in house. CT images with a slice thickness of 0.5 mm were obtained from 5 newborn cadavers and analyzed independently by two expert researchers. The border...

AbstractAccurate segmentation of retinal fluids in 3D Optical Coherence Tomography images is key for diagnosis and personalized treatment eye diseases. While deep learning has been successful at this task, trained supervised models often fail that do not resemble labeled examples, e.g. acquired using different devices. We hereby propose a novel semi-supervised framework volumetric from new unla...

PURPOSE To validate, in the context of adaptive radiotherapy, three commercial software solutions for atlas-based segmentation. METHODS AND MATERIALS Fifteen patients, five for each group, with cancer of the Head&Neck, pleura, and prostate were enrolled in the study. In addition to the treatment planning CT (pCT) images, one replanning CT (rCT) image set was acquired for each patient during t...