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排序方式: 共有1904条查询结果,搜索用时 31 毫秒
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Elisa Veronese Roberto Stramare Andrea Campion Bernd Raffeiner Valeria Beltrame Elena Scagliori Alessandro Coran Luca Ciprian Ugo Fiocco Enrico Grisan 《Medical engineering & physics》2013,35(2):188-194
Rheumatoid arthritis (RA) is a chronic multisystemic autoimmune disease, with an unclear etiopathogenesis. Its early diagnosis and activity assessment are essential to adjust the proper therapy. Among the different imaging techniques, ultrasonography (US) allows direct visualization of early inflammatory joint changes as synovitis, being also rapidly performed and easily accepted by patients. We propose an algorithm to semi-automatically detect synovial boundaries on US images, requiring minimal user interaction. In order to identify the synovia-bone and the synovia-soft tissues interfaces, and to tackle the morphological variability of diseased joints, a cascade of two different active contours is developed, whose composition corresponds to the whole synovial boundary.The algorithm was tested on US images acquired from proximal interphalangeal (PIP) and metacarpophalangeal (MCP) finger joints of 34 subjects. The results have been compared with a consensus manual segmentation. We obtained an overall mean sensitivity of 85 ± 13%, and a mean Dice's similarity index of 80 ± 8%, with a mean Hausdorff distance from the manual segmentation of 28 ± 10 pixels (approximately 1.4 ± 0.5 mm), that are a better performance than those obtained by the raters with respect to the consensus. 相似文献
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Manuel Zorzi Nicola Gennaro Giulia Capodaglio Emanuele Damiano Luca Urso Salvatore Pucciarelli Laura Memo Eva Carpin Mariachiara Corti Massimo Rugge Ugo Fedeli 《Digestive and liver disease》2019,51(2):304-309
Background
Growing evidence suggests that colorectal cancer (CRC) screening based on the fecal immunochemical test (FIT) reduces CRC incidence and surgical resection rates.Aims
To compare trends in surgery for proximal and distal CRC among Italian regions at different stages of screening implementation.Methods
From the National Hospital Discharge Database we selected hospitalizations with CRC resection of residents aged 50–74 years during 2002–2014, and computed surgery rates for the 8 most populous Italian regions with/without a screening program.Results
In regions with screening, implemented around 2006–2007, the annual percent change (APC) of distal CRC resection was +1.7 (95% confidence interval ?1.0, 4.4) during 2002–2007 and ?9.1 (?10.6, ?7.7) during 2007–2014. No significant change was observed in regions without screening. The APC for proximal colon resection in regions with screening was +5.8 (2.5, 9.0) during 2002–2007 and ?4.1 (?5.8, ?2.4) during 2007–2014, while in regions without screening surgical rates increased through the whole study period. Compared to 2002, in 2014 distal CRC resection rates were greatly reduced in regions with screening, reaching values similar to proximal CRC resection.Conclusion
Following the implementation of screening programs surgery rates steeply decreased, confirming the deep impact of FIT-based screening on the burden of CRC. 相似文献35.
Giuseppe Gargiulo Sara Ariotti Pascal Vranckx Sergio Leonardi Enrico Frigoli Nestor Ciociano Carlo Tumscitz Francesco Tomassini Paolo Calabrò Stefano Garducci Gabriele Crimi Giuseppe Andò Maurizio Ferrario Ugo Limbruno Bernardo Cortese Paolo Sganzerla Alessandro Lupi Filippo Russo Marco Valgimigli 《JACC: Cardiovascular Interventions》2018,11(1):36-50
Objectives
This study sought to assess whether transradial access (TRA) compared with transfemoral access (TFA) is associated with consistent outcomes in male and female patients with acute coronary syndrome undergoing invasive management.Background
There are limited and contrasting data about sex disparities for the safety and efficacy of TRA versus TFA for coronary intervention.Methods
In the MATRIX (Minimizing Adverse Haemorrhagic Events by TRansradial Access Site and Systemic Implementation of angioX) program, 8,404 patients were randomized to TRA or TFA. The 30-day coprimary outcomes were major adverse cardiovascular and cerebrovascular events (MACCE), defined as death, myocardial infarction, or stroke, and net adverse clinical events (NACE), defined as MACCE or major bleeding.Results
Among 8,404 patients, 2,232 (26.6%) were women and 6,172 (73.4%) were men. MACCE and NACE were not significantly different between men and women after adjustment, but women had higher risk of access site bleeding (male vs. female rate ratio [RR]: 0.64; p = 0.0016), severe bleeding (RR: 0.17; p = 0.0012), and transfusion (RR: 0.56; p = 0.0089). When comparing radial versus femoral, there was no significant interaction for MACCE and NACE stratified by sex (pint = 0.15 and 0.18, respectively), although for both coprimary endpoints the benefit with TRA was relatively greater in women (RR: 0.73; p = 0.019; and RR: 0.73; p = 0.012, respectively). Similarly, there was no significant interaction between male and female patients for the individual endpoints of all-cause death (pint = 0.79), myocardial infarction (pint = 0.25), stroke (pint = 0.18), and Bleeding Academic Research Consortium type 3 or 5 (pint = 0.45).Conclusions
Women showed a higher risk of severe bleeding and access site complications, and radial access was an effective method to reduce these complications as well as composite ischemic and ischemic or bleeding endpoints. 相似文献36.
37.
Presently, 12 human polyomaviruses are known: BK polyomavirus (BKPyV), JCPyV, KIPyV, WUPyV, Merkel cell polyomavirus (MCPyV), HPyV6, HPyV7, Trichodysplasia spinulosa‐associated polyomavirus, HPyV9, HPyV10, STLPyV and HPyV12. In addition, the non‐human primate polyomavirus simian virus 40 (SV40) seems to circulate in the human population. MCPyV was first described in 2008 and is now accepted to be an etiological factor in about 80% of the rare but aggressive skin cancer Merkel cell carcinoma. SV40, BKPyV and JCPyV or part of their genomes can transform cells, including human cells, and induce tumours in animal models. Moreover, DNA and RNA sequences and proteins of these three viruses have been discovered in tumour tissue. Despite these observations, their role in cancer remains controversial. So far, an association between cancer and the other human polyomaviruses is lacking. Because human polyomavirus DNA has been found in a broad spectrum of cell types, simultaneous dwelling with other oncogenic viruses is possible. Co‐infecting human polyomaviruses may therefore act as a co‐factor in the development of cancer, including those induced by other oncoviruses. Reviewing studies that report co‐infection with human polyomaviruses and other tumour viruses in cancer tissue fail to detect a clear link between co‐infection and cancer. Directions for future studies to elaborate on a possible auxiliary role of human polyomaviruses in cancer are suggested, and the mechanisms by which human polyomaviruses may synergize with other viruses in oncogenic transformation are discussed. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
38.
Marco Valgimigli Paolo Calabrò Bernardo Cortese Enrico Frigoli Stefano Garducci Paolo Rubartelli Giuseppe Andò Andrea Santarelli Mario Galli Roberto Garbo Alessandra Repetto Salvatore Ierna Carlo Briguori Ugo Limbruno Roberto Violini Andrea Gagnor 《Journal of cardiovascular translational research》2014,7(1):101-111
Early invasive management and the use of combined antithrombotic therapies have decreased the risk of recurrent ischaemia in patients with acute coronary syndrome (ACS) but have also increased the bleeding risk. Transradial intervention (TRI) and bivalirudin infusion compared to transfemoral intervention (TFI) or unfractionated heparin (UFH) plus glycoprotein IIb/IIIa inhibitors (GPI) decrease bleeding complications in patients with ACS. To what extent, a bleeding preventive strategy incorporating at least one of these two treatment options translates into improved outcomes is a matter of debate. The Minimizing Adverse Haemorrhagic Events by Transradial Access Site and Systemic Implementation of AngioX study is a large-scale, multicenter, prospective, open-label trial, conducted at approximately 100 sites in Europe aiming to primarily assess whether TRI and bivalirudin infusion, as compared to TFI and UFH plus provisional GPI, decrease the 30-day incidence of death, myocardial infarction or stroke across the whole spectrum of ACS patients. 相似文献
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