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第三代双源CT联合迭代重建技术在全面评估人工心脏瓣膜中的成像进展

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国际医学放射学杂志 2018年第4期 492-492页

作者： m.E.Faure l.E.Swart m.l.dijkshoorn J.A.Bekkers m.V.Straten K.Nieman 谢雁蓉 Department of Radiology University Hospital of Antwerp

目的多层螺旋CT在人工心脏瓣膜(PHV)的功能评估中意义重大。成像过程中的辐射剂量亦值得关注。本实验旨在有限的放射剂量下,采用更新的CT扫描方案对PHV的功能进行全面评估。方法采用第三代双源CT(DSCT)扫描设备联合迭代重建(IR)技术对PH... 详细信息

目的多层螺旋CT在人工心脏瓣膜(PHV)的功能评估中意义重大。成像过程中的辐射剂量亦值得关注。本实验旨在有限的放射剂量下,采用更新的CT扫描方案对PHV的功能进行全面评估。方法采用第三代双源CT(DSCT)扫描设备联合迭代重建(IR)技术对PHV置换术后的病人进行扫描,采用3种扫描方案:平扫、增强扫描动脉期CT血管成像(CTA)(体表心电图每间隔5%作为成像间期)、全胸部延迟期的大螺距CTA。影像质量评价总分为5分。根据CT容积剂量指数(CTDI)和剂量长度乘积(DlP)评价辐射剂量。结果本实验共纳入43例病人的影像数据。平扫、增强动脉期及延迟期的平均影像质量评分分别为4.1±1.4、4.7±0.5及4.2±0.6,总平均分为4.3±0.7。瓣叶的平均影像质量分值为3.9±1.4。平扫(40例)、增强动脉期(43例)及延迟期(43例)的平均DlP分别为8.2±17.1、457.3±168.6、(68.5±47.2)mGy·cm,总平均值为(569±208)mGy·cm。平均辐射剂量为(8.3±3.0)m Sv(43例)。结论多层螺旋CT联合IR技术可以在中等辐射剂量下对PHV进行全面功能评估。

关键词：人工心脏瓣膜 PHV 功能评估延迟期第三代 CT

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迭代重建对冠状动脉CTA钙化积分的影响

国际医学放射学杂志 2014年第1期 94-94页

作者： A.Kurata A.Dharampal A.Dedic P.J.de Feyter G.P.Krestin m.l.dijkshoorn 袁涛 Department of Radiology Erasmus Medical Centre ‘s Gravendijkwal 2303015CE Rotterdam The Netherlands

目的探讨正弦图证实的迭代重建(SAFIRE)对冠状动脉CTA钙化积分(CAC)的影响。方法70例病人采用128层双源CT行CAC。根据滤波反投影(FBP)法重建影像计

关键词： CT 冠状动脉疾病动脉硬化图像处理影像阅读迭代重建

肾及尿路成像:三期mDCT尿路成像(mDCTU)一站式方案设计、造影检查及影像质量分析

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国际医学放射学杂志 2010年第4期 375-375页

作者： m.Kekelidze R.S.Dwarkasing m.l.dijkshoorn K.Sikorska P.C.m.S.Verhagen G.P.Krestin 庞国栋 Department of Radiology Erasmus Medical Center Rotterdam`s-Gravendijkwal2303015 CE Rotterdamthe Netherlands.From the 2006 RSNA Annual Meeting

目的应用3次注射定量对比剂行单源多层CT尿路成像(mDCTU),回顾性评价肾、血管、尿路的显示情况。材料与方法本研究经伦理委员会批准,不需要知情同意书。110例行三期团

关键词：尿路成像血管团注 mDCT mDCTU 三期

Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

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Neural Regeneration Research 2025年第10期20卷 2913-2914页

作者： William J.Flerlage mark l.Dell’Acqua Brian m.Cox Fereshteh S.Nugent Uniformed Services University of the Health Sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(Simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

Getting physical with medical education:Exercise based virtual anatomy review classes for medical students

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World Journal of methodology 2025年第1期15卷 20-25页

作者： Nadeesha R Samarasinghe Taniya S Nagpal michele l Barbeau Charys m martin Division of General Surgery Faculty of MedicineUniversity of British ColumbiaVancouver V6T 1Z3BCCanada Faculty of Kinesiology Sport and RecreationUniversity of AlbertaEdmonton T6G 2R3ABCanada Anatomy and Cell Biology University of Western OntarioLondon N6A 3K7ONCanada Department of Anatomy and Cell Biology Schulich School of Medicine and DentistryThe University of Western OntarioLondon N6A 3K7ONCanada

The benefits of regular physical activity are well ***,few studies have examined the effectiveness of integrating physical activity(PA)into curricula within a post-secondary *** investigate the incorporation of PA into medical curriculum,we developed a series of optional exercise-based review sessions designed to reinforce musculoskeletal(mSK)anatomy course *** synchronous sessions were co-taught by a group fitness instructor and an anatomy *** fitness instructor would lead students through both strength and yoga style exercises,while the anatomy instructor asked questions about relevant anatomical structures related to course material previously *** the sessions,participants were asked to evaluate the classes on their self-reported exam preparedness in improving mSK anatomy knowledge,PA levels,and mental *** participants completed surveys;a majority agreed that the classes increased understanding of mSK concepts(90.0%)and activity levels(97.7%).many(70.0%)felt that the classes helped reduce *** majority of respondents(90.0%)agreed that the classes contributed to increased feelings of social ***,medical students saw benefit in PA based interventions to supplement mSK course *** with increasing activity levels and promoting health behaviours,integrating PA into medical curriculum may improve comprehension of learning material,alleviate stress and foster social connectivity among medical students.

关键词： medical education musculoskeletal Anatomy Exercise Online learning

Relative importance of different physical processes on upper crustal specific heat flow in the Eifel-maas region, Central Europe and ramifications for the production of geothermal energy

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Natural Science 2013年第2期5卷 268-281页

作者： lydia dijkshoorn Christoph Clauser Institute for Applied Geophysics and Geothermal Energy E. On Energy Research Center RWTH Aachen University Aachen Ger- many Institute for Applied Geophysics and Geothermal Energy E. On Energy Research Center RWTH Aachen University Aachen Ger- many

We study the recent upper crustal heat flow variations caused by long-term physical processes such as paleoclimate, erosion, sedimentation and mantle plume upwelling. As specific heat flow is a common lower boundary condition in many models of heat en fluid flow in the Earth’s crust we quantify its long-term transient variation caused by paleoclimate, erosion or sedimentation, mantle plume upwelling and deep groundwater flow. The studied area extends between the Eifel mountains and the maas river inCentral Europe. The total variation due to these processes in our study area amounts to tectonic events manifested in the studied area 20 mW/m2, about 30% of the present day specific heat flow in the region.

关键词： Crustal Heat Flow Physical Process modeling Eifel Geothermal Energy Hydrothermal System

Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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Neural Regeneration Research 2025年第5期20卷 1324-1335页

作者： Hassan Saad Bachar El Baba Ali Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel Refai Gerald R.Rodts Christian mustroph David Gimbel Jonathan Grossberg Daniel l.Barrow matthew F.Gary Ali m.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy

Analysis of culturable and unculturable microbial community in bensulfuron-methyl contaminated paddy soils

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Journal of Environmental Sciences 2008年第12期20卷 1494-1500页

作者： m.l.Umashankara Department of Sericulture College of YuvarajasMysore University

To investigate the influence of bensulfuron-methyl(BSm)on culturable microbial quantities and unculturable microbial community structures,conventional and molecular biological methods were employed in five BSm treated soils with three replications,respectively. The results obtained with traditional culture-dependent methods showed that a low-level of BSm had slight and transient effects on culturable microorganisms;nevertheless,high concentration of BSm resulted in a dramatic decrease in bacterial colony fo...

关键词： bensulfuron-methyl(BSm) microbial quantities community structures DGGE

The dynamic compensation temperature in a kinetic spin-5/2 Ising model on a hexagonal lattice

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Chinese Physics B 2013年第3期22卷 471-480页

作者： mt Temizer Aysegl Ozkιlι Department of Physics Bozok University66200 YozgatTurkey Institute of Science Bozok University66200 YozgatTurkey

We present a study of the dynamic behavior of a two-sublattice spin-5/2 Ising model with bilinear and crystal-field interactions in the presence of a time-dependent oscillating external magnetic field on alternating layers of a hexagonal lattice by using the Glauber-type stochastic *** lattice is formed by alternate layers of spins σ=5/2 and S=5/*** employ the Glauber transition rates to construct the mean-field dynamic ***,we investigate the time variations of the average sublattice magnetizations to find the phases in the system and then the thermal behavior of the dynamic sublattice magnetizations to characterize the nature（first-or second-order） of the phase transitions and to obtain the dynamic phase transition（DPT） *** also study the thermal behavior of the dynamic total magnetization to find the dynamic compensation temperature and to determine the type of the dynamic compensation *** present the dynamic phase diagrams,including the dynamic compensation temperatures,in nine different *** phase diagrams contain seven different fundamental phases,thirteen different mixed phases,in which the binary and ternary combination of fundamental phases and the compensation temperature or the l-type behavior strongly depend on the interaction parameters.

关键词： kinetic Ising model dynamic phase transition dynamic compensation temperature