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Modelling the probability of erroneous negative lymph node staging in patients with colon cancer

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Cancer Communications 2019年第1期39卷 293-302页

作者： Carlos Fortea-Sanchis Erica Forcadell-Comes david martínez-Ramos Javier Escrig-Sos Division of Colorectal Surgery Department of SurgeryConsorci Hospitalari Provincial de CastellóCastellóSpain Oropesa Health Center Carrer de Torreblanca1412594 OropesaCastellóSpain Department of Surgery Hospital General de CastellóCastellóSpain

Background:Patients in who with insufficient number of analysed lymph nodes(LNs)are more likely to receive an incorrect LN *** ability to calculate the overall probability of undiagnosed LN involvement errors in these patients could be very useful for approximating the real patient prognosis and for giving possible indications for adjuvant *** objective of this work was to establish the predictive capacity and prognostic discriminative ability of the final error probability(FEP)among patients with colon cancer and with a potentially incorrectly-staged LN-negative ***:This was a retrospective multicentric population study carried out between January 2004 and December *** used a mathematical model based on Bayes’theorem to calculate the probability of LN involvement given a FEP test *** sum graphs were used to calculate risk groups and the survival rates were calculated,by month,using the Kaplan-Meier ***:A total of 548 patients were analysed and classified into three risk groups according to their FEP score:low-risk(FEP15%).Patients with LN involvement had the lowest overall survival rate when compared to the three risk *** difference was statistically significant for the low-and intermediate-risk groups(P=0.002 and P=0.004,respectively),but high-risk group presented similar survival curves to pN+group(P=0.505).In terms of disease-free survival,the high-risk group presented similar curves to the intermediate-risk group until approximately 60 months’follow-up(P=0.906).After 80 months’follow-up,the curve of high-risk group coincided with that of the pN+group(P=0.172).Finally,we summarized the FEP according to the number of analysed LNs and accompanied by a contour plot which represents its calculation ***:The application of Bayes’theorem in the calculation of FEP is useful to delimit risk subgroups from among patients without LN i

关键词： Colon cancer Lymph node staging Bayes’theorem Final error probability Prognosis

Yearly variation in the structure and diversity of a non-breeding passerine bird community in a Mediterranean wetland

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Avian Research 2020年第3期11卷 238-245页

作者： Juan Arizaga Daniel Alonso ArinCrespo Xabier Esparza Efrén Fernández Iógo López david martín Antonio Vilches Department of Ornithology Aranzadi Sciences Society S. Sebastián Spain

Background:The dynamics and structure of many bird communities are changing due to the global warming and changes in the land use and *** Ebro Valley constitutes one of the chief wintering areas for several passerine species in Iberia,and the reed beds spread across this Valley concentrate huge numbers of birds that use them to roost,while the surrounding agricultural areas serve as main foraging *** aims of this work are(1)to quantify how variable a non-breeding passerine bird community associated to a reed bed area in the Ebro Valley is,and,(2)to test for the effect of weather on possible annual fluctuations in species’proportions at a regional/local ***:We used for that ringing data collected at Badina de Escudera lagoon(Navarra)over a 12-year ***:Though,overall,the assemblage did not vary strongly among years(most similarity values were>0.8),we still found a significant linear effect of year on the proportion of captures of Reed Buntings(Emberiza schoeniclus),i.e.,the dominant species detected in our passerine *** increasing loss of weight of Reed Buntings in the community was due to a progressive decrease in its ***:The structure and diversity of passerine community in Badina Escudera was not influenced by meteorological conditions at a local scale,suggesting that local weather would not have an impact on numbers of Reed Buntings in winter.

关键词： Navarra Emberiza schoeniclus Ringing Long-term monitoring

Dual role of FGF in proliferation and endoreplication of Drosophila tracheal adult progenitor cells

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Journal of Molecular Cell Biology 2020年第1期12卷 32-41页

作者： Cristina de Miguel Josefa Cruz david martin Xavier Franch-Marro Institute of Evolutionary Biology(Consejo Superior de Investigaciones Cientificas-Universitat Pompeu Fabra) Passeig Maritim de la Barceloneta 3708003 BarcelonaSpain

Adult progenitor cells activation is a key event in the formation of adult *** Drosophilat formation of abdominal adult trachea depends on the specific activation of tracheal adult progenitors(tracheoblasts)at the Tr4 and Tr5 spiracular *** of these tracheoblasts generates a pool of tracheal cells that migrate toward the posterior part of the trachea by the activation of the branchless/fibroblast growth factor(Bnl/FGF)signaling to form the abdominal adult ***,we show that,in addition to migration,Bnl/FGF signaling,mediated by the transcription factor Pointed,is also required for tracheoblast *** tracheoblast activation relies on the expression of the FGF ligand bnl in their nearby ***,we show that,in the absence of the transcription factor Cut(Ct),Bnl/FGF signaling induces endoreplication of tracheoblasts partially by promoting fizzy-related ***,our results suggest a dual role of Bnl/FGF signaling in tracheoblasts,inducing both proliferation and endoreplication,depending on the presence or absence of the transcription factor Ct,respectively.

关键词： FGF trachea adult progenitors cut proliferation endoreplication Pnt Fzr

Automatic Mexican Sign Language Recognition Using Normalized Moments and Artificial Neural Networks

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Engineering（科研） 2016年第10期8卷 733-740页

作者： Francisco Solís david martínez Oscar Espinoza Universitary Center UAEM of Teotihuacan Valley Autonomous University of Mexico’s State Axapusco México

This document presents a computer vision system for the automatic recognition of Mexican Sign Language (MSL), based on normalized moments as invariant (to translation and scale transforms) descriptors, using artificial neural networks as pattern recognition model. An experimental feature selection was performed to reduce computational costs due to this work focusing on automatic recognition. The computer vision system includes four LED-reflectors of 700 lumens each in order to improve image acquisition quality;this illumination system allows reducing shadows in each sign of the MSL. MSL contains 27 signs in total but 6 of them are expressed with movement;this paper presents a framework for the automatic recognition of 21 static signs of MSL. The proposed system achieved 93% of recognition rate.

关键词： Mexican Sign Language Automatic Sign Language Recognition Normalized Moments Computer Vision System

Mexican Sign Language Recognition Using Jacobi-Fourier Moments

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Engineering（科研） 2015年第10期7卷 700-705页

作者： Francisco Solís Carina Toxqui david martínez University Center UAEM Teotihucan Valley Autonomous University of Mexico State M&eacute xico Polytechnic University of Tulancingo Tulancingo M&eacute xico

The present work introduces a system for recognizing static signs in Mexican Sign Language (MSL) using Jacobi-Fourier Moments (JFMs) and Artificial Neural Networks (ANN). The original color images of static signs are cropped, segmented and converted to grayscale. Then to reduce computational costs 64 JFMs were calculated to represent each image. The JFMs are sorted to select a subset that improves recognition according to a metric proposed by us based on a ratio between dispersion measures. Using WEKA software to test a Multilayer-Perceptron with this subset of JFMs reached 95% of recognition rate.

关键词： Mexican Sign Language Jacobi-Fourier Moments Digital Image Processing

Fecal immunochemical test accuracy in average-risk colorectal cancer screening

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World Journal of Gastroenterology 2014年第4期20卷 1038-1047页

作者： Vicent Hernandez Joaquin Cubiella M Carmen Gonzalez-Mao Felipe Iglesias Concepción Rivera M Begoa Iglesias Lucía Cid Ines Castro Luisa de Castro Pablo Vega Jose Antonio Hermo Ramiro Macenlle Alfonso martínez-Turnes david martínez-Ares Pamela Estevez Estela Cid M Carmen Vidal Angeles López-martínez Elisabeth Hijona marta Herreros-Villanueva Luis Bujanda Jose Ignacio Rodriguez-Prada the COLONPREV study investigators Department of Gastroenterology Complexo Hospitalario Universitario de Vigo Department of Gastroenterology Complexo Hospitalario Universitario de Ourense Department of Clinical Analysis Complexo Hospitalario Universitario de Vigo Department of Pathology Complexo Hospitalario Universitario de Vigo Department of Gastroenterology Donostia Hospital Biodonostia Institute University of the Basque Country UPV/EHU

AIM: To assess the fecal immunochemical test (FIT) accuracy for colorectal cancer (CRC) and advanced neoplasia (AN) detection in CRC screening.

关键词： Colorectal neoplasms Early detection of cancer Sensitivity and specificity Adenoma Occult blood Cost-benefit analysis

Conservative management of perforated duodenal diverticulum: A case report and review of the literature

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World Journal of Gastroenterology 2008年第12期14卷 1949-1951页

作者： david martínez-Cecilia Alvaro Arjona Sánchez Manuel Gómez álvarez Eva Torres Tordera Antonio Luque Molina Victor Valentí Azcárate Javier Briceo Delgado Francisco Javier Padillo Pedro López-Cillero Sebastián Rufián Pea Hospital Universitario Reina Sofia Av. Menendez Pidal sn. 14005. Córdoba Spain. Clínica Universitaria de Navarra Avenida de Pio XII 36 Pamplona 31008 Spain.

Duodenal diverticula are a relatively common condition. They are asymptomatic, unless they become complicated, with perforation being the rarest but most severe complication. Surgical treatment is the most frequently performed approach. We report the case of a patient with a perforated duodenal diverticulum, which was diagnosed early and treated conservatively with antibiotics and percutaneous drainage of secondary retroperitoneal abscesses. We suggest this method could be an acceptable option for the management of similar cases, provided that the patient is in good general condition and without septic signs.

关键词： Duodenal diverticula Perforation Conservativemanagement

People Recognition by RGB and NIR Analysis from Digital Image Database Using Cross-Correlation and Wavelets

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Engineering（科研） 2024年第10期16卷 353-359页

作者： david martínez-martínez Yedid Erandini Niño-Membrillo José Francisco Solís-Villarreal Oscar Espinoza-Ortega Lizbeth Sandoval-Juárez Francisco Javier Núñez-García Centro Universitario UAEM Valle de Teotihuacn Universidad Autnoma del Estado de Mxico Axapusco Mxico Centro Universitario UAEM Texcoco Universidad Autnoma del Estado de Mxico Texcoco Mxico

This document presents a framework for recognizing people by palm vein distribution analysis using cross-correlation based signatures to obtain descriptors. Haar wavelets are useful in reducing the number of features while maintaining high recognition rates. This experiment achieved 97.5% of individuals classified correctly with two levels of Haar wavelets. This study used twelve-version of RGB and NIR (near infrared) wavelength images per individual. One hundred people were studied;therefore 4,800 instances compose the complete database. A Multilayer Perceptron (MLP) was trained to improve the recognition rate in a k-fold cross-validation test with k = 10. Classification results using MLP neural network were obtained using Weka (open source machine learning software).

关键词： Palm Vein Recognition Cross-Correlation Haar Wavelets Multilayer Perceptron

Magnetic resonance imaging findings of spontaneous pyomyoma in a premenopausal woman managed with myomectomy:A case report

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World Journal of Radiology 2023年第3期15卷 83-88页

作者： david martínez Gustavo E Sanchez Jhonatan Gómez Luis J Sonda Luis D Suárez Carlos S López Juan J Vega Daniel A Cepeda Department of Radiology Hospital Christus MuguerzaPuebla 72501PueblaMexico Department of Radiology Hospital Regional Dr.Juan Graham CasasùsVillahermosa 86126TabascoMexico Department of Radiology Hospital de Especialidades 5 de MayoPuebla 72550PueblaMexico

BACKGROUND Acute fibroid complications are ***,failure to recognize and treat acute complications expeditiously when they occur can lead to catastrophic,even deadly,*** is a rare but potentially fatal condition resulting from infarction and infection of a fibroid through bacterial seeding and direct,hematogenous,or lymphatic *** though the diagnosis is established through clinical and laboratory findings,imaging is an important complementary method to support the suspected *** SUMMARY Herein,we report a case of a pyomyoma in a nulliparous woman previously diagnosed with uterine leiomyomatosis according to ultrasound *** patient had previously attended the emergency room due to hypogastric pain unresponsive to *** a week of persistent pain,she developed sepsis without any identifiable *** resonance imaging revealed findings compatible with uterine myomatosis with red degeneration,and a possible diagnosis of a pyomyoma was made according to the imaging findings along with the patient’s clinical *** decided to perform myomectomy(which is an infrequently performed surgical treatment due to the procedure’s intrinsic implic-ations)due to the patient’s desire to preserve *** results revealed a uterine leiomyoma with coagulative and liquefactive necrosis,while the tissue culture showed gram-negative cocci bacteria,which were successfully treated using antibiotic *** patient’s health status improved after several *** The main diagnostic tools to evaluate pyomyomas are the clinical and laboratory findings as well as tissue ***,magnetic resonance imaging can help to corroborate these findings as well as to better characterize myomas with its different complications.

关键词： Diffusion-weighted images Apparent diffusion coefficient Leiomyoma Sepsis Magnetic resonance imaging Case report