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Real- world evaluation of Brainomix e- Stroke software

Stroke & Vascular Neurology 2024年第5期9卷 497-504页

作者： Dermot Mallon Matthew Fallon Eirini Blana Cillian McNamara Arathi Menon Chak Lam ip Jack Garnham Tarek Yousry Peter Cowley Robert Simister David Doig Lysholm Department of Neuroradiology National Hospital for Neurology and NeurosurgeryUniversity College London Hospitals NHS Foundation TrustLondonUK UCL Queen Square Institute of Neurology LondonUK Comprehensive Stroke Centre University College London Hospitals NHS Foundation TrustLondonUK

Background and purpose Brainomix e-Stroke is an artificial intelligence-based decision support tool that aids the interpretation of CT imaging in the context of acute *** e-Stroke has the potential to improve the speed and accuracy of diagnosis,real-world validation is *** aim of this study was to prospectively evaluate the performance of Brainomix e-Stroke in an unselected cohort of patients with suspected acute ischaemic *** The study cohort included all patients admitted to the University College London Hospital Hyperacute Stroke Unit between October 2021 and April *** e-ASPECTS and e-CTA,the ground truth was determined by a neuroradiologist with access to all clinical and imaging *** e-CTP,the values of the core infarct and ischaemic penumbra were compared with those derived from ***,an alternate software used at our *** 1163 studies were performed in 551 patients admitted during the study *** these,1130(97.2%)were successfully processed by e-Stroke in an average of *** identifying acute middle cerebral artery territory ischaemia,e-ASPECTS had an accuracy of 77.0%and was more specific(83.5%)than sensitive(58.6%).The accuracy for identifying hyperdense thrombus was lower(69.1%),which was mainly due to many false positives(positive predictive value of 22.9%).Identification of acute haemorrhage was highly accurate(97.8%)with a sensitivity of 100%and a specificity of 97.6%;false positives were typically caused by areas of *** accuracy of e-CTA for large vessel occlusions was 91.5%.The core infarct and ischaemic penumbra volumes provided by e-CTP strongly correlated with those provided by ***(ρ=0.804—0.979).Conclusion Brainomix e-Stroke software provides rapid and reliable analysis of CT imaging in the acute stroke setting although,in line with the manufacturer’s guidance,it should be used as an adjunct to expert interpretation rather than a standalone decision-making tool.

关键词： admitted false Stroke

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复杂装置网络可靠性评估模型与算法

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东北工学院学报 2004年第6期25卷 539-542页

作者：刘艳秋张颖汪定伟 ip.W.H. 东北大学信息科学与工程学院辽宁沈阳110004 沈阳工业大学运筹与控制研究所辽宁沈阳110023 香港理工大学工业及系统工程系

研究了多状态、全终端复杂网络系统可靠性分析问题,通过使用结构函数设计了网络可靠性评估模型,并利用生成树的特性和网络图的环和理论,给出了多状态、全终端复杂装置网络可靠性分析的新算法·本算法并不需要全体生成树和全体割集作为... 详细信息

研究了多状态、全终端复杂网络系统可靠性分析问题,通过使用结构函数设计了网络可靠性评估模型,并利用生成树的特性和网络图的环和理论,给出了多状态、全终端复杂装置网络可靠性分析的新算法·本算法并不需要全体生成树和全体割集作为前提条件,也不需要两次使用不交和运算,仅仅从一颗生成树开始,就可确定该网络的可靠性·该方法与传统方法比较,不仅降低了该类问题算法的计算复杂性,而且提高了评估过程的准确性、可操作性·大量实例计算表明了模型与算法的可行性与有效性·

关键词：复杂装置网络可靠性评估模型算法生成树多状态结构函数网络图

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Incidence Rate of Urinary Tract Infection Between Indwelling Foley’s Catheter and Intermittent Catheterization

Incidence Rate of Urinary Tract Infection Between Indwelling...

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中国康复医学会第四届会员代表大会暨第三届中国康复医学学术大会

作者： HOJYL WONG LMW ip FSH Sha Wan Drive PokfulamHong Kong

Most of the spinal cord injury patients will have urinary *** of them willneed indwelling Foley‘s catheter or intermittent catheterization as their long-term method of *** order to help patients to decide which method to use,this report is intended to comparethe incidence of urinary tract infection in spinal cord injury patients between indwelling Foley’s catheter(IC) and intermittent catheterization(IMC) in MacLehose Medical Rehabilitation Centre in Hong Kongover the period between 1995 to 2001(until May 31 2001).Urinary tract infection in this report is de-fined as patients having fever greater than 38℃ elsius,change in character of urine,(*** withurine culture result with significant growth of bacteria),and treated with antibiotic(s).Objective the ob-jective is to find out the incidence rate of urinary tract infection between using Foley’s catheter and inter-mittent *** we can decide which method of bladder management is safer for the spinalcord injury patients who require long--term bladder *** Retrospective review for 85spinal cord injury patients over the period of 1995 to 2001 were *** obtained including demo-graphic characteristics,methods of bladder management,and frequency of urinary tract infection for eachtype of bladder *** There were 83 out of 85 patients who needed long--term *** of 83 patients,56 were male with a mean age of 48,and 27 were female with a meanage of *** incidence of urinary tract infection was expressed as the number of episodes per 1,000 pa-tient *** average incidence of urinary tract infection over the 6 years and 5 months‘ time related toIC was 0.26,whereas 0.08 was related to *** we compared the incidence rate between IC and IMCeach year,the incidence rate for IC remains *** annual relative risk(RR) between the two meth-ods was also *** average,the RR was 0.75 which in favour of *** Sp

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A robust watermarking scheme for 3D triangular mesh models

A robust watermarking scheme for 3D triangular mesh models

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第一届信号与信息处理联合学术会议

作者： Horace H.S.ip Research Centre for Media Technology Department of Computer Science City University of Hong Kong Tat Chee Avenue KowloonHong

In this paper we propose a robust 3D model watermarking scheme for triangle meshes. Our approach embeds watermark information by modifying the length of the vectors that link vertices to the centre of the model. Particularly, our approach is able distribute information corresponds to a bit of the watermark over the entire model and the strength of the watermark signal is adaptive with respect to the local geometry of the model. Experiments show that this watermarking scheme is robust against attacks such as mesh simplification, addition of noise, and model cropping.

关键词： Digital watermarking 3D model Triangular naeshes.

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Giant Asian honeybee or Bambara stings causing myocardial infarction,bowel gangrene and fatal anaphylaxis in Sri Lanka:a case series

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Asian Pacific Journal of Tropical Medicine 2010年第7期3卷 586-588页

作者： Budagoda BDSS Kodikara KAS Kularatne WKS Mudiyanse RM Edussuriya DH Edirisinghe JP Karunaratne ip Weerakoon KGAD Medagedara SC Kularatne SAM Department of Medicine Faculty of MedicineUniversity of PeradeniyaSri Lanka 'Department of Forensic Medicine Faculty of MedicineUniversity of PeradeniyaSri Lanka Teaching Hospital PeradeniyaSri Lanka Department of Forensic Medicine Faculty of MedicineUniversity of PeradeniyaSri Lanka Department of Zoology Faculty of ScienceUniversity of PeradeniyaPeradeniyaSri Lanka

The sting of Giant Asian honeybee(Apis dorsata) or Bambara in Sinhala and Kanmge Kulavi in Tamil is a common environmental hazard in Sri Lanka known to cause immediate allergic reactions,which could be fatal in sensitized *** reported myocardial infarction, bowel gangrene and fatal anaphylaxis in a prospectively proven case series and the association of these uncommon complications with delayed removal of stingers from the patients’skin.

关键词： Giant Asian honeybee Bambara Myocardial infarction Bowel gangrene Fatal anaphylaxis Sri Lanka

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RFID技术与应用中的建模与优化的研究综述

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控制工程 2013年第1期20卷 9-12,17页

作者：汪定伟 ip W H 东北大学系统工程研究所辽宁沈阳110819 香港理工大学工业与系统工程系

RFID与传感器网络是物联网的基础技术。随着RFID的广泛应用,产生了许多新的建模与优化的问题。分别从RFID技术和应用两个方面对这些新问题的研究情况进行综述。主要问题包括:读卡器网络的布置优化,读卡器负荷平衡,RFID存储的数据分配,... 详细信息

RFID与传感器网络是物联网的基础技术。随着RFID的广泛应用,产生了许多新的建模与优化的问题。分别从RFID技术和应用两个方面对这些新问题的研究情况进行综述。主要问题包括:读卡器网络的布置优化,读卡器负荷平衡,RFID存储的数据分配,高速读入的防碰撞算法,RFID系统的投资回报的分析与决策,RFID带来的业务流程再造问题,供应链中的存储优化问题,个件层(Item-Level)管理带来的新问题,动态信息与快速响应的新问题等。

关键词： RFID 物联网建模与优化

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Fractal analysis of retinal vasculature in normal subjects on ultra-wide field fluorescein angiography

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International Journal of Ophthalmology(English edition) 2020年第7期13卷 1109-1114页

作者： Wen-Ying Fan Alan Fleming Gavin Robertson Akihito Uji Jano van Hemert Michael Singer Min Sagong Michael ip SriniVas R.Sadda Beijing Tongren Eye Center Beijing Tongren HospitalBeijing Ophthalmology and Visual Sciences Key LaboratoryCapital Medical UniversityBeijing 100730China Doheny Image Reading Center Doheny Eye InstituteLos AngelesCA 90086USA Department of Ophthalmology David Geffen School of Medicine at UCLALos AngelesCA 90095USA Optos PLC Dunfermline KY118GRUnited Kingdom Department of Ophthalmology Medical Center Ophthalmology AssociatesSan AntonioTX 78258USA

AIM: To evaluate the fractal feature of the retinal vasculature of normal eyes on a stereographic projected and montaged ultra-wide field(UWF) fluorescein angiography(FA).METHODS: Prospective, observational, cross-sectional study. Totally 59 eyes of 31 normal subjects were imaged using the Optos 200 Tx. Images obtained at different gaze angles stereographically projected and montaged. The early-phase UWF FA frames were processed to segment the retinal vasculature and the results were exported as binary masks. The fractal dimension(FD) was calculated using the box-counting ***: The global FD for the entire retina was 1.6±0.04, with no difference between males and females(1.59±0.04 vs 1.61±0.04, P=0.084) or between right and left eyes(1.6±0.04 vs 1.6±0.05, P=0.61). FD was nonuniformly distributed among four quadrants(Pip was observed in the posterior and mid-peripheral retina(Piphery(P>0.05).CONCLUSION: Fractal geometry is non-uniformly distributed across the retina in normal eyes and decreases from the fovea to the far-periphery. Subjects with an older age tend to have a smaller FD, however, the FD in the farperiphery does not appear to be influenced by age.

关键词： fractal analysis retina ultra-wide field fluorescein angiography normal subject

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Genome sequencing reveals the role of rare genomic variants in Chinese patients with symptomatic intracranial atherosclerotic disease

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Stroke & Vascular Neurology 2022年第3期7卷 182-189页

作者： Mengmeng Shi Xinyi Leng Ying Li Zihan Chen Ye Cao Tiffany Chung Bonaventure YM ip Vincent HL ip Yannie OY Soo Florence SY Fan Sze Ho Ma Karen Ma Anne Y Y Chan Lisa WC Au Howan Leung Alexander Y Lau Vincent CT Mok Kwong Wai Choy Zirui Dong Thomas W Leung Department of Obstetrics and Gynaecology The Chinese University of Hong KongHong KongChina Key Laboratory for Regenerative Medicine Ministry of Education(Shenzhen Base)Shenzhen Research InstituteThe Chinese University of Hong KongShenzhenChina Hong Kong Hub of Paediatric Excellence The Chinese University of Hong KongHong KongChina Department of Medicine and Therapeutics The Chinese University of Hong KongPrince of Wales HospitalHong KongChina Department of Paediatrics The Chinese University of Hong KongHong KongChina The Chinese University of Hong Kong-Baylor College of Medicine Joint Center For Medical Genetics The Chinese University of Hong KongHong KongChina

Objectives The predisposition of intracranial atherosclerotic disease(ICAD)to East Asians over Caucasians infers a genetic basis which,however,remains largely *** prevalence of vascular risk factors(VRFs)in Chinese over Caucasian patients who had a stroke,and shared risk factors of ICAD with other stroke subtypes indicate genes related to VRFs and/or other stroke subtypes may also contribute to *** Unrelated symptomatic patients with ICAD were recruited for genome sequencing(GS,60-fold).Rare and potentially deleterious single-nucleotide variants(SNVs)and small insertions/deletions(InDels)were detected in genome-wide and correlated to genes related to VRFs and/or other stroke *** aneuploidies,copy number variants(CNVs)and chromosomal structural rearrangements were also ***,candidate genes were used for pathway and gene ontology enrichment *** Among 92 patients(mean age at stroke onset 61.0±9.3 years),GS identified likely ICAD-associated rare genomic variants in 54.3%(50/92)of ***-eight patients(52.2%,48/92)had 59 rare SNVs/InDels reported or predicted to be deleterious in genes related to VRFs and/or other stroke *** of the 59 rare variants were identified in local subjects without ICAD(n=126).31 SNVs/InDels were related to conventional VRFs,and 28 were discovered in genes related to other stroke *** study also showed that rare CNVs(n=7)and structural rearrangement(a balanced translocation)were potentially related to ICAD in 8.7%(8/92)of ***,candidate genes were significantly enriched in pathways related to lipoprotein metabolism and cellular lipid catabolic *** Our GS study suggests a role of rare genomic variants with various variant types contributing to the development of ICAD in Chinese patients.

关键词： patients metabolism intracranial

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Sino-Mauritian Trade Heading for A Bright Future

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China's Foreign Trade 2018年第2期 42-43页

作者： Zhijie Guan Jim ip Ping Sheong School of Business Changzhou University

China has marked itself in the world;it has trade partners allaround the *** therecent years,China has turned its attention to ***,a small island in the Indian Ocean,has also received help from China in terms of loans and foreign direct *** the establishment of diplomatic relations in 1972 between Mauritius and China,the trade between the two countries has increased at a rapid pace.

关键词： Sino-Mauritian Trade Heading for A Bright Future

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“Random Coil” Proton Chemical Shift of Deoxyribonucleic Acids.

“Random Coil” Proton Chemical Shift of Deoxyribonucleic Ac...

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第十二届全国波谱学学术会议

作者： Sik Lok Lain Lai Nang ip Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong

＜正＞With the combination of the aromatic proton chemical shills of the central nucleotides in triplets and the correction factors determined for the next nearest neighbor effect, the aromatic proton chemical shills of“random coil”DNA sequences can be predicted *** aromatic proton chemical shifts of 16 unstructured single-strand DNA sequences containing all 64 different types of triplets have been measured.

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