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Characterization of Malalignment between Atrial and Ventricular Septa in Overriding/Straddling Tricuspid and Mitral Valves

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Congenital Heart Disease 2021年第1期16卷 1-16页

作者： Mika Saito Dragulescu Andreea shi-joon yoo The Labatt Family Heart Centre The Hospital for Sick ChildrenUniversity of TorontoTorontoCanada Division of Cardiology Department of PaediatricsThe Hospital for Sick ChildrenUniversity of TorontoTorontoCanada Department of Diagnostic Imaging The Hospital for Sick ChildrenUniversity of TorontoTorontoCanada

Objective:Overriding/straddling of an atrioventricular valve is a consequence of atrial-ventricular septal *** sought to characterize the malalignment by analogizing it to a flap-door and using structured ***:The echocardiograms and magnetic resonance images of 35 patients with overriding/straddling tricuspid or mitral valve were evaluated to assess the following modifiers;the malaligned part of the septum,the reference structure,and the mechanism,direction and severity of ***:The pathology included classic overriding tricuspid valve in 15,classic overriding mitral valve in 12,and overriding tricuspid valve with left juxtaposition of atrial appendages in *** classic overriding tricuspid valve,the ventricular septum was hinged to the anterior interventricular groove and its insertion to the posterior interventricular groove was displaced toward the right *** VSD primarily involved the inlet but also extended toward the anterior interventricular *** classic overriding mitral valve,the ventricular septum was hinged to the posterior interventricular groove and crux *** insertion to the anterior interventricular groove was displaced toward the left *** VSD primarily involved the anterior part but also extended toward the *** tricuspid valve with left juxtaposition of atrial appendages had a mild degree of malalignment with displacement/rotation of the atrioventricular *** spaced short-axis images were most helpful in characterizing the ***:Overriding/straddling atrioventricular valves can be easily understood by analogizing the atrial-ventricular septal malalignment to a flap-door and describing the pathology in a structured *** to what has previously been known,the VSD is not limited to the inlet or outlet part of the ventricular septum.

关键词： Malalignment ventricular septal defect overriding straddling tricuspid mitral

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Disharmonious Ventricular Relationship and Topology for the Given Atrioventricular *** Diagnostic Approach Using 3D Modeling and Printing

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Congenital Heart Disease 2022年第5期17卷 495-504页

作者： shi-joon yoo Ankavipar Saprungruang Christopher Z.Lam Robert H.Anderson Department of Diagnostic Imaging Hospital for Sick ChildrenUniversity of TorontoTorontoCanada Division of Cardiology Department of PediatricsLabatt Family Heart CentreHospital for Sick ChildrenUniversity of TorontoTorontoCanada Biosciences Division Newcastle UniversityNewcastle-upon-TyneUK

In the last issue,two case reports separately present examples of the extremely rare and complex congenital heart diseases that show concordant atrioventricular connections to the L-looped ventricles in the presence of situs *** cases highlight that the relationship between the two ventricles within the ventricular mass is not always harmonious with the given atrioventricular *** disharmony between the connections and relationships requires careful assessment of the three basic facets of cardiac building blocks,namely their morphology,the relationship of their component parts,and their connections with the adjacent segments.3D imaging and printing can now facilitate an otherwise difficult diagnosis in such complex *** of either the 3D images or the models permit accurate assessment of the ventricular topologic pattern by creating the right ventricular en-face septal view,thus facilitating placement of the observer’s *** we now emphasize,an alternative approach,which might prove more attractive to imagers,is to rotate the ventricular mass to provide the ventricular apical view,thus permitting determination of the ventricular relationship without using the hands.

关键词： Segmental approach disharmony between connection and relationship ventricular loop pattern ventricular topology juxtaposition of atrial appendages 3D modeling 3D printing

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New Insights into Sinus Venosus Defects from Cross-Sectional Imaging

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Congenital Heart Disease 2022年第1期17卷 5-23页

作者： shi-joon yoo Sanga Lee Regina de la Mora Ankavipar Saprungruang Christoph Haller Lee N.Benson Vladimiro Vida Alvise Guariento Christopher Z.Lam Department of Diagnostic Imaging Hospital for Sick ChildrenUniversity of TorontoTorontoCanada Division of Cardiology Department of PaediatricsLabatt Family Heart CentreHospital for Sick ChildrenUniversity of TorontoTorontoCanada Department of Diagnostic Imaging Sejong Heart CenterBucheonKorea Department of Radiology Instituto Nacional de CardiologíaMexico CityMexico Division of Cardiac Surgery Department of SurgeryLabatt Family Heart CentreHospital for Sick ChildrenUniversity of TorontoTorontoCanada Pediatric and Congenital Cardiac Surgery Unit University of Padua Medical SchoolPaduaItaly

Sinus venosus defects include two varieties,superior and inferior sinus venosus *** superior sinus venosus defect is characterized by abnormal communication between two closely related venoatrial structures:1)the normally positioned superior vena cava-right atrium complex and 2)the right pulmonary vein-left atrium complex that is displaced leftward,forward and *** sinus venosus defects primarily involve the inferior vena cava-right atrial junction while the right pulmonary vein-left atrial junction can also be *** of the rarity and wide variation of the defects,the morphological characterization of sinus venosus defects is inconsistent among investigators and often *** imaging technologies with high spatial and temporal resolutions have allowed accurate and detailed assessment of the pathological anatomy in larger numbers of *** this pictorial essay,we revisit the established and controversial features of the sinus venous defects using twodimensional(2D)and three-dimensional(3D)images obtained by magnetic resonance(MR)or computed tomography(CT)with brief discussion on imaging and treatment strategies.

关键词： Sinus venosus defect superior sinus venosus defect inferior sinus venosus defect anomalous pulmonary venous connection overriding superior vena cava overriding inferior vena cava

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Magnetic resonance imaging of the transplanted pediatric heart as a potential predictor of rejection

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World Journal of Transplantation 2016年第4期6卷 751-758页

作者： Steven C Greenway Frederic Dallaire Paul F Kantor Anne I Dipchand Rajiv R Chaturvedi Monali Warade Eugenie Riesenkampff shi-joon yoo Lars Grosse-Wortmann Department of Paediatrics University of Calgary Labatt Family Heart Centre the Hospital for Sick Children Department of Paediatrics University of Toronto Division of Pediatric Cardiology University of Sherbrooke and Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke Department of Pediatric Cardiology Stollery Children’s Hospital Department of Diagnostic Imaging the Hospital for Sick Children University of Toronto

AIM To evaluate cardiac magnetic resonance imaging(CMR) as a non-invasive tool to detect acute cellular rejection(ACR) in children after heart transplant(HT).METHODS Thirty pediatric HT recipients underwent CMR at the time of surveillance endomyocardial biopsy(EMB) and results were compared to 14 non-transplant controls. Biventricular volumes, ejection fractions(EFs), T2-weighted signal intensities, native T1 times, extracellular volumes(ECVs) and presence of late gadolinium enhancement(LGE) were compared between patients and controls and betweenpatients with International Society of Heart and Lung Transplantation(ISHLT) grade ≥ 2R rejection and those with grade 0/1R. Heart rate(HR) and brain natriuretic peptide(BNP) were assessed as potential *** Significant ACR(ISHLT grade ≥ 2R) was an infrequent event in our population(5/30, 17%). Ventricular volumes,EFs, LGE prevalence, ECVs, native T1 times, T2 signal intensity ratios, HR and BNP were not associated with the presence of ≥ 2R *** In this pilot study CMR did not reliably identify ACRrelated changes in pediatric HT patients.

关键词： Heart Pediatric Transplantation Magnetic resonance imaging Rejection

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Enhanced solid-electrolyte interface efficiency for practically viable hydrogen-air fuel cell systems

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Journal of Energy Chemistry 2025年第1期 356-368页

作者： Venkitesan Sakthivel Dong Jin yoo Graduate School Department of Energy Storage/Conversion Engineering (BK21 FOUR) Hydrogen and Fuel Cell Research Center Jeonbuk National University Jeonju Department of Life Science Jeonbuk National University

Proton exchange membrane fuel cells （PEMFCs） provide an appealing sustainable energy system,with the solid-electrolyte membrane playing a crucial role in its overall ***,sulfonated poly（1,4-phenylene ether-ether sulfone）(SPEES),an aromatic hydrocarbon polymer,has garnered considerable attention as an alternative to Nafion ***,the long-term durability and stability of SPEES present a significant *** this context,we introduce a potential solution in the form of an additive,specifically a core–shell-based amine-functionalized iron titanate （A–Fe2TiO5）,which holds promise for improving the lifetime,proton conductivity,and power density of SPEES in *** modified SPEES/A–Fe2TiO5composite membranes exhibited notable characteristics,including high water uptake,enhanced thermomechanical stability,and oxidative ***,the SPEES membrane loaded with 1.2 wt%of A–Fe2TiO5demonstrates a maximum proton conductivity of 155 mS cm-1,a twofold increase compared to the SPEES membrane,at 80°C under 100%relative humidity （RH）.Furthermore,the 1.2 wt%of A–Fe2TiO5/SPEES composite membranes exhibited a maximum power density of 397.37 mW cm-2and a current density of 1148 mA cm-2at 60°C under 100%RH,with an opencircuit voltage decay of 0.05 m V/h during 103 h of continuous *** study offers significant insights into the development and understanding of innovative SPEES nanocomposite membranes for PEMFC applications.

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Design of Authoring Tool for Static and Dynamic Projection Mapping

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Computers, Materials & Continua 2021年第1期66卷 1-16页

作者： Sang-joon Kim Nammee Moon Min Hong Gooman Park yoo-Joo Choi Seoul National University of Science and Technology 172 Gongneung-dongNowon-guSeoulKorea Hoseo University 165 Sechul-ri Baebang-eupAsan-siChungcheongnam-doKorea Soonchunhyang University 336-745Asan-siChungcheongnam-doKorea Seoul Media Institute Technology 661 Deungchon-dongGangseo-guSeoulKorea

This study introduces the design details of a tool to create interactive projection-mapping content in a convenient *** the proposed tool design,a homography-based camera–projector calibration method was applied with the use of red–green–blue-depth images from a Kinect V2 sensor that did not require accurate camera calibration *** addition,the proposed tool simultaneously achieved static projection mapping that projected the image content onto a fixed object,and dynamic projection mapping that projected the image content onto a user’s body,by tracing the moving *** verify the effectiveness of the proposed content-creation tool,users with no programming capabilities were employed to create contents that were projected onto various objects in fixed positions and a user’s body in various poses,thereby analyzing the tool’s ***,the projection accuracy was analyzed at different depth positions,and the projection-mapping accuracy was verified with the use of the proposed method.

关键词： Dynamic projection mapping camera-projector calibration Kinect projection mapping content authoring tool

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Mimicking a Superhydrophobic Insect Wing by Argon and Oxygen Ion Beam Treatment on Polytetrafluoroethylene Film

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Journal of Bionic Engineering 2009年第4期6卷 365-370页

作者： Youngjong Lee Yonghoon yoo Jihoon Kim Sriyulianti Widhiarini Baeho Park Hoon Cheol Park Kwang joon yoon Doyoung Byun Department of Aerospace Information Engineering Konkuk UniversitySeoul 143-701Republic of Korea Department of Physics Konkuk UniversitySeoul 143-701Republic of Korea Department of Advanced Technology Fusion Konkuk UniversitySeoul 143-701Republic of Korea

Biological tiny structures have been observed on many kinds of surfaces such as lotus leaves and insect wings,which enhance the hydrophobicity of the natural surfaces and play a role of *** presented the fabrication technology of a superhydrophobic surface using high energy ion *** insect wings that mimic the morphology and the superhydrophobocity of cicada's wings were successfully fabricated using argon and oxygen ion beam treatment on a polytetrafluoroethylene (PTFE)*** wing structures were supported by carbon/epoxy fibers as artificial flexible veins that were bonded through an autoclave *** morphology of the fabricated surface bears a strong resemblance to the wing surface of a cicada,with contact angles greater than 160°,which could be sustained for more than two months.

关键词： superhydrophobic insect wing mimicry of the wing ion beam treatment artificial flapper dynamic contact angle

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Stud welding for fixation of cryogenic insulation of membrane tanks in LNG ship building

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中国有色金属学会会刊：英文版 2009年第B09期19卷 271-275页

作者： Jeong-Soo LEE Young-Soo RYU Nam-In KIM Bong-joon KIM yoo-Kyung KIM Myung-Hyun KIM Hanjin Heavy Industries & Construction Co. Ltd Department of Naval Architecture and Ocean Engineering Pusan National University

The support plates including all of the inner hulls such as E grade steel, weld seams and SUS304L were considered to establish the optimal stud welding condition in LNG ship building. The stainless steel plate was especially applied to the bracket on the liquid dome. The polished and etched surfaces of the welded stud and support plate were examined if the bead was properly formed. With the micrographic examination, the fusion boundary of metal weld zone formed by stud welding was analyzed to optimize the welding parameters. And also the analysis of the unacceptable welding faults such as cold and hot weld were performed. The mechanical tests such as tensile tests and bending tests were carried out to reveal any abnormal variation in the relationship of process parameters and the strength.

关键词：螺柱焊接 LNG船绝缘膜优化工艺参数低温坦克不锈钢板最佳条件

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Characterization of focal hypermetabolic thyroid incidentaloma: An analysis with F-18 fluorodeoxyglucose positron emission tomography/computed tomography parameters

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World Journal of Clinical Cases 2022年第1期10卷 155-165页

作者： Haejun Lee yoo Seung Chung joon-Hyop Lee Ki-Young Lee Kyung-Hoon Hwang Department of Nuclear Medicine Gachon University College of MedicineGil Medical CenterIncheon 21565South Korea Department of Endocrine Surgery Gachon University College of MedicineGil Medical CenterIncheon 21565South Korea Department of Endocrinology and Metabolism Gachon University College of MedicineGil Medical CenterIncheon 21565South Korea

BACKGROUND Incidentally found thyroid tumor(thyroid incidentaloma,TI)on F-18 fluorodeoxyglucose(FDG)positron emission tomography-computed tomography(PETCT)is reported in 2.5%-5%of patients being investigated for non-thyroid *** to 50%of these cases have been diagnosed to be malignant by cytological/histological ***(US)and fine-needle aspiration cytology are recommended for thyroid nodules with high FDG uptake(hypermetabolism)that are 1 cm or greater in *** is important to accurately determine whether a suspicious hypermetabolic TI is malignant or *** To distinguish malignant hypermetabolic TIs from benign disease by analyzing F-18 FDG PET-CT parameters and to identify a cut-off *** Totally,12761 images of patients who underwent F-18 FDG PET-CT for nonthyroid purposes at our hospital between January 2016 and December 2020 were retrospectively reviewed,and 339 patients[185 men(mean age:68±11.2)and 154 women(mean age:63±15.0)]were found to have abnormal,either focal or diffuse,thyroid FDG *** a thorough review of their medical records,US,and cytological/histological reports,46 eligible patients with focal hypermetabolic TI were included in this *** TIs were categorized as malignant and benign according to the cytological/histological reports,and four PET parameters[standardized uptake value(SUV)max,SUV_(peak),SUV_(mean),and metabolic tumor volume(MTV)]were measured on FDG *** lesion glycolysis(TLG)was calculated by multiplying the SUV_(mean) by *** parametric and non-parametric methods were used to compare the five parameters between malignant and benign *** operating characteristic(ROC)curve analysis was performed to identify a cut-off *** Each of the 46 patients[12 men(26.1%;mean age:62±13.1 years)and 34 women(73.9%;mean age:60±12.0 years)]with focal hypermetabolic TIs had one focal hypermetabolic *** them,26(56.5%)were malignant and 20(43.5%)were ***_(max

关键词： Thyroid incidentaloma Malignancy Fluorodeoxyglucose positron emission tomography/computed tomography Standardized uptake value Cut-off

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Structural Analysis of FRIGIDA Flowering-Time Regulator

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Molecular Plant 2016年第4期9卷 618-620页

作者： Kyung-gi Hyun JeeEun Oh Jihye Park yoo-Sun Noh Ji-joon Song School of Biological Sciences Seoul National University Seoul 151-747 Korea

Dear Editor,Flowering is a major developmental switch in the life cycle of flowering plants. FRIGIDA （FRI） activates FLOWERING LOCUS C （FLC） transcription, a major repressor of this switch regulating flow- ering time （Johanson et al., 2000）. FRI is highly conserved and many natural variations in FRI are found to affect flowering time. However, little is known about the molecular characteristics of FRI.

关键词： LOCUS in plant genetics FLOWERING time MOLECULAR structure

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