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Acquisition repeatability of MRI radiomics features in the head and neck:a dual-3D-sequence multi-scan study

Visual Computing for Industry,Biomedicine,and Art 2022年第1期5卷 115-127页

作者： Cindy Xue Jing Yuan Yihang Zhou Oi Lei Wong kin yin cheung Siu Ki Yu Research Department Hong Kong Sanatorium&HospitalHong KongChina Medical Physics Department Hong Kong Sanatorium&HospitalHong KongChina

Radiomics has increasingly been investigated as a potential biomarker in quantitative imaging to facilitate personalized diagnosis and treatment of head and neck cancer(HNC),a group of malignancies associated with high ***,the feature reliability of radiomics is a major obstacle to its broad validity and generality in application to the highly heterogeneous head and neck(HN)*** particular,feature repeatability of radiomics in magnetic resonance imaging(MRI)acquisition,which is considered a crucial confounding factor of radiomics feature reliability,is still sparsely *** study prospectively investigated the acquisition repeatability of 93 MRI radiomics features in ten HN tissues of 15 healthy volunteers,aiming for potential magnetic resonance-guided radiotherapy(MRgRT)treatment of *** subject underwent four MRI acquisitions with MRgRT treatment position and immobilization using two pulse sequences of 3D T1-weighed turbo spin-echo and 3D T2-weighed turbo spin-echo on a 1.5T MRI *** repeatability of radiomics feature acquisition was evaluated in terms of the intraclass correlation coefficient(ICC),whereas within-subject acquisition variability was evaluated in terms of the coefficient of variation(CV).The results showed that MRI radiomics features exhibited heterogeneous acquisition variability and uncertainty dependent on feature types,tissues,and pulse *** a small fraction of features showed excellent acquisition repeatability(ICC>0.9)and low within-subject *** MRI scans improved the accuracy and confidence of the identification of reliable features concerning MRI acquisition compared to simple test-retest repeated *** study contributes to the literature on the reliability of radiomics features with respect to MRI acquisition and the selection of reliable radiomics features for use in modeling in future HNC MRgRT applications.

关键词： Radiomics Magnetic resonance guided radiotherapy Head and neck Repeatability Intraclass correlation coefficient

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Small Molecule Organic Nanostructures—Fabrication and Properties

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Journal of Materials Science & Technology 2008年第4期24卷 563-568页

作者： A.B.Djurii A.M.C.Ng Kai-yin cheung Man-kin FUNG Wai-kin CHAN Department of Physics University of Hong KongPokfulam RoadHong KongHong Kong SARChina Department of Chemistry University of Hong KongPokfulam RoadHong KongHong Kong SARChina

Organic materials are of great interest for the development of low cost electronic and optoelectronic devices. Although majority of research on organic materials is concerned with synthesis of novel compounds and organic thin films, organic nanostructures are attracting increasing interest in recent years. We briefly review different growth methods of organic nanostructures, which can be roughly divided into vapor deposition methods and self-assembly techniques in solution. Then we highlight some interesting properties of organic nanostructures, as well as possible applications, includinf field emission, electronic and optoelectronic devices.

关键词： Organic nanostructures Self-assembly Vapor deposition

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Colonoscopy in Hong Kong Chinese children

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World Journal of Gastroenterology 2010年第9期16卷 1119-1122页

作者： Yuk Him Tam Kim Hung Lee kin Wai Chan Jennifer Dart yin Sihoe Sing Tak cheung Jennifer Wai cheung Mou Division of Paediatric Surgery & Paediatric Urology Department of SurgeryPrince of Wales HospitalThe Chinese University of Hong Kong

AIM:To investigate the safety and diagnostic yield of colonoscopy in Chinese children in whom the procedure is not often ***:We conducted a retrospective review of all colonoscopies in consecutive children who underwent their fi rst diagnostic colonoscopy from Jan 2003 to ***:Seventy-nine children (48 boys,31 girls;mean age 9.2 ± 4.2 years) were identified and reviewed with a total of 82 colonoscopies *** caecal and ileal intubation rates were 97.6% and 75.6% *** patients (50.6%) had a positive diagnosis made in colonoscopy and that included colonic polyps (23),Crohn's disease (12),ulcerative colitis (1),and miscellaneous causes (4).80% of polyps were in the rectosigmoid *** but one were juvenile hamartomatous *** exceptionwas an adenomatous *** mean ages for children with inflammatory bowel disease (IBD) and polyps were 11.3 and 4.3 years *** was no procedure-related ***:Colonoscopy is a safe procedure in our Chinese *** increasing diagnosis of IBD in recent decades may reflect a rising incidence of the disease in our children.

关键词： Colonoscopy Children Inflammatory bowel disease Colonic polyps

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国际医学物理组织(International Organization for Medical Physics,IOMP)第1号政策声明(2010年6月17日)医学物理师:作用和职责

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中国医学物理学杂志 2012年第4期29卷 F0002-F0002,F0003页

作者： kin yin cheung Cari Boris Stelios Christofides Anchali Krishanachinda Tomas Kron George Starkschall 胡志辉中国医学科学院肿瘤医院放射治疗科北京100021

前言本政策声明为IOMP成员组织在确立医学物理师的作用和职责时提供总体指导方针。它可以作为医学物理专业组织和卫生主管部门在筹划和发展临床医学物理服务,以及学术机构在教育和培训医学物理师时的参考。本文件应当与IOMP第2号政策... 详细信息

前言本政策声明为IOMP成员组织在确立医学物理师的作用和职责时提供总体指导方针。它可以作为医学物理专业组织和卫生主管部门在筹划和发展临床医学物理服务,以及学术机构在教育和培训医学物理师时的参考。本文件应当与IOMP第2号政策声明（教育和培训医学物理师的基本要求）一起结合阅读。

关键词：医学物理师专业组织职责国际卫生主管部门学术机构培训教育

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Therapeutic advances: Single incision laparoscopic hepatopancreatobiliary surgery

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World Journal of Gastroenterology 2014年第39期20卷 14329-14337页

作者： Stephen kin Yong Chang Kai yin Lee Division of Hepatobiliary and Pancreas Surgery Department of Surgery National University Singapore Hospital

Single-port laparoscopic surgery(SPLS) is proposed to be a step towards minimizing the invasiveness of surgery, and has since gained popularity in several surgical sub-specialties including hepatopancreatobiliary surgery. SPLS has since been applied to cholecystectomy, liver resection as well as pancreatectomy for a multitude of pathologies. Benefits of SPLS over conventional multi-incision laparoscopic surgery include improved cosmesis and potentially post-operative pain at specific time periods and extra-umbilical sites. However, it is also associated with longer operating time, increased rate of complications, and increased rate of port-site hernia. There is no significant difference between length of hospital stay. SPLS has a significant learning curve that affects operating time, rate of conversion and rate of complications. In this article, we review the literature on SPLS in hepatobiliary surgery- cholecystectomy, hepatectomy and pancreatectomy, and offer tips on overcoming potential technical obstacles and minimizing the complications when performing SPLS- surgeon position, position of port and instruments, instrument crossing position, standard hand grip vs reverse hand grip, snooker cue guide position, prevention of incisional hernia. SPLS is a promising direction in laparoscopic surgery, and we recommend step-wise progression of applications of SPLS to various hepatopancreatobiliary surgeries to ensure safe adoption of the surgical technique.

关键词： Single port laparoscopic Cholecystectomy Hepatectomy Pancreatectomy Liver resection

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Catering for Learner Diversity in Hong Kong Secondary Schools:Insights from the Relationships Between Students’Learning Styles and Approaches

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ECNU Review of Education 2020年第4期3卷 610-631页

作者： Hongbiao yin John Chi-kin Lee Zhonghua Zhang Faculty of Education The Chinese University of Hong KongR407Ho Tim BldgShatinNTHong Kong SARChina The Education University of Hong Kong The University of Melbourne

Purpose:Catering for learner diversity is a key issue in the recent educational reforms in Hong *** present study addresses this issue through an investigation of the relationships between students’learning styles and approaches to learning in Hong Kong secondary ***/Approach/Methods:A total of 6,054 junior secondary students in Hong Kong responded to a questionnaire consisting of two instruments.A series of confirmatory factor analysis,two-way analysis of variance,and structural equation modeling analysis were ***:The results identified three types of learning style among the students which are characterized by a cognitive orientation,a social orientation,and a methodological *** significant gender-and achievement-level differences were *** with the socially oriented learning style,the cognitively and methodologically oriented learning styles were more extensively and strongly related to students’approaches to learning,even though these students showed a greater preference for the socially oriented learning ***/Value:It is unwise to blindly cater for students’learning styles in classroom teaching and curriculum *** should adopt a comprehensive and balanced approach toward the design of curriculum and teaching which not only highlights the congruence between students’learning styles and teacher’s pedagogy but also integrates the constructive frictions between them into classroom teaching.

关键词： Approaches to learning Hong Kong junior secondary students learner diversity learning styles

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In vivo genome editing thrives with diversified CRISPR technologies

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Zoological Research 2018年第2期39卷 58-71页

作者： Xun Ma Avery Sum-Yu Wong Hei-yin Tam Samuel Yung-kin Tsui Dittman Lai-Shun Chung Bo Feng Key Laboratory for Regenerative Medicine in Ministry of Education School of Biomedical Sciences Faculty of Medicine The Chinese University of Hong Kong Guangzhou Institute of Biomedicine and Health Chinese Academy of Sciences SBS Core Laboratory CUHK Shenzhen Research Institute

Prokaryotic type II adaptive immune systems have been developed into the versatile CRISPR technology, which has been widely applied in site- specific genome editing and has revolutionized biomedical research due to its superior efficiency and flexibility. Recent studies have greatly diversified CRISPR technologies by coupling it with various DNA repair mechanisms and targeting strategies. These new advances have significantly expanded the generation of genetically modified animal models, either by including species in which targeted genetic modification could not be achieved previously, or through introducing complex genetic modifications that take multiple steps and cost years to achieve using traditional methods. Herein, we review the recent developments and applications of CRISPR-based technology in generating various animal models, and discuss the everlasting impact of this new progress on biomedical research.

关键词： CRISPR/Cas9 Genome editing Animal models

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Traditional Chinese medicine poisoning in the emergency departments in Hong Kong: Trend, clinical presentation and predictors for poor outcome

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World Journal of Emergency Medicine 2021年第2期12卷 143-150页

作者： Rex Pui kin Lam Eric Ho yin Lau Wai Lam Yip Joe Kai Shing Leung Matthew Sik Hon Tsui Emergency Medicine Unit Li Ka Shing Faculty of Medicinethe University of Hong KongHong KongChina Accident and Emergency Department Queen Mary HospitalHong KongChina Accident and Emergency Department Pamela Youde Nethersole Eastern HospitalHong KongChina School of Public Health Li Ka Shing Faculty of Medicinethe University of Hong KongHong KongChina

Dear editor,Traditional Chinese medicine (TCM) is popular in many countries,especially in the Chinese population.^([1,2]) In Hong Kong,it has been estimated that around 15%of the population consumed Chinese medicine products/herbs in the preceding *** reasons for consumption include regulating bodily functions,curing disease,and building up health.

关键词： has editor curing

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Polyoxypregnanes as safe, potent, and specific ABCB1-inhibitory pro-drugs to overcome multidrug resistance in cancer chemotherapy in vitro and in vivo

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Acta Pharmaceutica Sinica B 2021年第7期11卷 1885-1902页

作者： Xu Wu Chun yin Jiang Ma Stella Chai Chunyuan Zhang Sheng Yao Onat Kadioglu Thomas Efferth Yang Ye Kenneth kin-Wah To Ge Lin School of Biomedical Sciences Faculty of Medicinethe Chinese University of Hong KongHong Kong 999077China Joint Research Laboratory of Promoting Globalization of Traditional Chinese Medicines between the Chinese University of Hong Kong and Shanghai Institute of Materia Medica Chinese Academy of SciencesHong Kong 999077China State Key Laboratory of Drug Research and Natural Products Chemistry Department Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Department of Pharmaceutical Biology Johannes Gutenberg UniversityMainz 55099Germany School of Pharmacy Faculty of Medicinethe Chinese University of Hong KongHong Kong 999077China Laboratory of Molecular Pharmacology Department of PharmacologySchool of PharmacySouthwest Medical UniversityLuzhou 646000China

Multidrug resistance(MDR)mediated by ATP binding cassette subfamily B member 1(ABCB1)is significantly hindering effective cancer ***,currently,no ABCB1-inhibitory drugs have been approved to treat MDR cancer clinically,mainly due to the inhibitor specificity,toxicity,and drug ***,we reported that three polyoxypregnanes(POPs)as the most abundant constituents of Marsdenia tenacissima(***)were novel ABCB1-modulatory pro-drugs,which underwent intestinal microbiota-mediated biotransformation in vivo to generate active *** metabolites at non-toxic concentrations restored chemosensitivity in ABCB1-overexpressing cancer cells via inhibiting ABCB1 efflux activity without changing ABCB1 protein expression,which were further identified as specific non-competitive inhibitors of ABCB1 showing multiple binding sites within ABCB1 drug *** POPs did not exhibit ABCB1/drug metabolizing enzymes interplay,and their repeated administration generated predictable pharmacokinetic interaction with paclitaxel without obvious toxicity in *** further showed that these POPs enhanced the accumulation of paclitaxel in tumors and overcame ABCB1-mediated *** results suggested that these POPs had the potential to be developed as safe,potent,and specific pro-drugs to reverse ABCB1-mediated *** work also provided scientific evidence for the use of *** in combinational chemotherapy.

关键词： Multidrug resistance ABCB1 Polyoxypregnane Combination chemotherapy Marsdenia tenacissima

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Surgical outcomes for unilateral superior oblique palsy in Chinese population: a retrospective study

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International Journal of Ophthalmology(English edition) 2015年第1期8卷 107-112页

作者： Gordon Shing kin Yau Victor Tak Yau Tam Jacky Wai Yip Lee Theo Tak Kwong Chan Can yin Fun Yuen Department of Ophthalmology Caritas Medical Centre Department of Anatomy Faculty of MedicineUniversity of Hong Kong

AIM: To evaluate the outcome after surgery for unilateral superior oblique(SO) palsy in ***: The medical records of 39 patients that underwent surgery for unilateral SO palsy between January 2003 and December 2012 at Caritas Medical Centre, Hong Kong, were retrospectively reviewed. All surgeries were performed by a single surgeon. Pre-operative assessments for vertical deviation, cyclo-deviation, and Knapp’s classification were obtained to determine the nature and degree of surgical *** deviation was measured at 1wk; 1, 6mo and on last follow-up day post-operatively. Cyclo-deviation was measured on last follow-up day ***: During the 10 y period, 39 subjects were recruited. The most common etiology was congenital(94.9%). Knapp’s Type III(66.7%) and Type I(12.8%)classifications were the most common subtypes. To treat SO palsy, the most common surgical procedures were:isolated inferior oblique(IO) anteriorization(41.0%),isolated IO myectomy(10.3%), and isolated IO recession(10.3%). At 3.5 ±2.1y post-operatively, the vertical deviation was significantly reduced(15.1 ±6.2 PD versus0.5±1.4 PD, P <0.0001) without significant improvement in cyclo-deviation(P =0.5). Initial vertical deviation was correlated with cyclo-torsion(r =0.4, P =0.007). Those with over-correction had greater initial vertical deviation(19.4±7.2 PD versus 13.2±4.3 PD, P =0.003). After a single operation, 84.6% of subjects achieved a vertical deviation within ±3 PD.· CONCLUSION: The majority of subjects achieved corrected vertical deviation after a single surgery although there was no improvement in *** with over-correction of primary position deviation had greater preoperative vertical deviation and it may be related to simultaneous multiple muscle surgery.

关键词： superior oblique palsy vertical deviation surgery diplopia

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