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Detection of Regional Wall Motion Abnormalities in Compressed Sensing Cardiac Cine Imaging

World Journal of Cardiovascular Diseases 2018年第6期8卷 277-287页

作者： Juliane Goebel Felix Nensa haemi Schemuth Stefan Maderwald harald h. quick Thomas Schlosser Kai Nassenstein Department of Diagnostic and Interventional Radiology and Neuroradiology University Hospital Essen Essen Germany Erwin L. hahn Institute for Magnetic Resonance Imaging University of Duisburg-Essen Essen Germany high Field and hybrid MR Imaging University of Duisburg-Essen Essen Germany

Background: Recently faster cardiac magnetic resonance (CMR) cine sequences basing on k-t compressed sensing have been developed. Purpose: To compare two compressed sensing CMR sequences-one in breath-hold technique and one during free breathing—with the standard SSFP sequence with respect to regional left ventricular function assessment. Material and Methods: Left ventricular short-axis stacks of two compressed sensing sequences in breath-hold technique (sparse_hB) and during free breathing (sparse_FB;both spatial resolution, 1.8 × 1.8 × 8 mm3) and a standard SSFP cine sequence (spatial resolution, 1.9 × 1.9 × 8 mm3) were acquired in 50 patients on a 1.5 T MR system. Regional wall motion abnormalities (RWMA) were rated qualitatively (normal/hypo-/a-/dyskinesia) by two experienced readers in consensus for all cardiac segments (American heart Association’s segment model) and sequences. RWMA detection rates were compared between sequences by kappa statistic. Results: In 13 patients, RWMA were detected in at least one cardiac segment. The RWMA detection rates were similar between CMR sequences (hypokinesia, 7.2% to 7.9%;akinesia, 0.8% to 1.3%;dyskinesia 0.3% to 0.4%) and kappa statistics revealed an almost perfect agreement in RWMA detection between both sparse and the standard SSFP sequence (standard versus sparse_hB: kappa, 0.918, p value, p value, Conclusion: Compressed sensing cine CMR acquired during breath-hold or free-breathing allows reliable RWMA detection, thus, might alternatively be used in cine CMR for regional left ventricular function assessment.

关键词： Cardiac Imaging Techniques Cine Magnetic Resonance Imaging Cardiac Muscle Cardiac Volume Myocardial Contraction

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肿瘤18F-FDG PET/MRI全身显像专家共识(德国)

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中华核医学与分子影像杂志 2020年第9期40卷 549-555页

作者：王洋洋杨光杰(译) 王振光(审校) Lale Umutlu Thomas Beyer Johannes Stefan Grueneisen Christoph Rischpler harald h quick Veit-haibach Patrick Matthias Eiber Sandra Purz Gerald Antoch Sergios Gatidis Konstantin Nikolaou Jürgen FSchaefer IvoRausch herrmann Ken K.herrmann B.J.Krause S.O.Schoenberg L.Umutlu F.Anton G.Antoch M.hacker M.Luster S.Neumann D.Vorwerk 青岛大学附属医院核医学科PET/CT中心 266100 Department of Diagnostic and Interventional Radiology and Neuroradiology University-Hospital EssenGermany QIMP Group Centre for Medical Imaging and Biomedical EngineeringMedical University of ViennaAustria Department of Nuclear Medicine University-Hospital EssenGermany high-Field-and hybrid-MR-Imaging University-Hospital EssenGermany Joint Department of Medical Imaging University of TorontoCanada Department of Nuclear Medicine Klinikum rechts der IsarTechnical University of MunichGermany Department of Nuclear Medicine University of LeipzigGermany Department of Diagnostic and Interventional Radiology University DüsseldorfMedical FacultyDüsseldorfGermany Department of Diagnostic and Interventional Radiology University-Hospital TübingenGermany Department of Nuclear Medicine University Medical Center RostockGermany Department of Clinical Radiology and Nuclear Medicine University Medical Center MannheimGermany Deutsche Röntgengesellschaft BerlinGermany Division of Nuclear Medicine Department of Biomedical Imaging and Image-guided TherapyMedical University ViennaAustria Department of Nuclear Medicine University Hospital MarburgGermany Department of Radiology Klinikum IngolstadtGermany

PET/MRI一体机在2006年被首次提出可应用于临床;2010年,首台临床型PET/MRI一体机诞生。在20世纪早期,PET/CT和SPECT/CT一体机的广泛应用体现了融合显像的优势,为PET/MRI一体机的产生奠定了基础。目前,全球大约有150台全身PET/MRI一体机... 详细信息

PET/MRI一体机在2006年被首次提出可应用于临床;2010年,首台临床型PET/MRI一体机诞生。在20世纪早期,PET/CT和SPECT/CT一体机的广泛应用体现了融合显像的优势,为PET/MRI一体机的产生奠定了基础。目前,全球大约有150台全身PET/MRI一体机投入了临床应用,其中肿瘤显像是PET/MRI的主要应用领域之一。迄今为止,尽管PET/MRI临床应用在增加,但标准化的PET/MRI扫描方案还很少。因此,有必要制定患者检查和多中心研究都可遵循的标准化且一致性好的显像方案。该文总结了18F-脱氧葡萄糖(FDG)PET/MRI全身显像的患者就诊、检查准备、工作流程、显像方案以及报告书写等主要方面的专家共识,由长期使用PET、MRI和较早使用PET/MRI的相关资深专家制定。

关键词： PET/MRI 肿瘤全身显像专家共识

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Effect of Reactivity of quick Lime on the Properties of hydrated Lime Sorbent for SO_2 Removal

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Journal of Materials Science & Technology 2009年第3期25卷 329-332页

作者： h.G. Shin h. Kim Y.N. Kim h.S. Lee Department of Materials Science and Engineering Seoul National University Material Analysis Team Korea Testing Laboratory School of Materials Science and Engineering Pusan National University

The hydration of quick lime and the sulfation of hydrated lime were carried out for verification of relationship between the reactivity of quick lime and the properties of hydrated lime as a sorbent. The effect of reactivity of quick lime was investigated with the change of calcination temperature and time. Results obtained showed that the temperature rise during the hydration of quick limes varied from 31 to 69℃ with the variation of calcination temperature and time. The specific surface area and the sulfation ability of hydrated lime prepared by hydration of quick lime showed a proportional relationship with the reactivity of quick lime. The hydrated lime which was prepared by hydration of quick lime calcined at 1100℃ had the highest reactivity and showed 41.53 m^2/g of the specific surface area, 0.16 cm^3/g of the pore volume and 87% of the removal efficiency for SO2 removal,

关键词： Reactivity quick lime hydrated lime Calcination hydration Sorbent

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Impact of wind power generating system integration on frequency stabilization in multi-area power system with fuzzy logic controller in deregulated environment

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Frontiers in Energy 2015年第1期9卷 7-21页

作者： Y. K. BhATEShVAR h. D. MAThUR h. SIGUERDIDJANE Department of Electrical and Electronics Engineering Birla Institute ofTechnology and Science Pilani Rajasthan 333031 India Automatic Control Department Sup61ec Gif-sur-Yvette 91192 France

Among the available options for renewable energy integration in existing power system, wind power is being considered as one of the suited options for future electrical power generation. The major constraint of wind power generating system （WPGS） is that it does not provide inertial support because of power electronic converters between the grid and the WPGS to facilitate frequency stabilization. The proposed control strategy suggests a substantial contribution to system inertia in terms of short-term active power support in a two area restructured power system. The control scheme uses fuzzy logic based design and takes frequency deviation as input to provide quick active power support, which balances the drop in frequency and tie-line power during transient conditions. This paper presents a comprehensive study of the wind power impact with increasing wind power penetration on frequency stabilization in restructured power system scenario. Variation of load conditions are also analyzed in simulation studies for the same power system model with the proposed control scheme. Simula- tion results advocates the justification of control scheme over other schemes.

关键词： two area power system automatic generationcontrol wind power generating system (WPGS) deregu-lated environment fuzzy logic controller (FLC)

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Inhibition of sperm motility does not affect live-dead separation of bull sperm by glass beads

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Asian Journal of Andrology 2001年第3期3卷 193-198页

作者： Robert h.Foote Department of Animal Science Cornell University Ithaca NY 14853-4801 USA

Aim: This study was designed to explore factors which influence binding of dead versus live sperm to glass ***: Multiple semen collections from bulls were used to explore selective filtration of bull sperm as influencedby nonlethal inhibition of sperm motility with fluoride, killing of sperm by quick-freezing, alteration of the glass sur-face with silicone, and different intervals of sexual rest between semen collections. Results: A comparison of glassspheres 100, 200 and 390μm in diameter indicated that 200 μm spheres were optimal for selective filtration. Quantita-tive separation of live from dead sperm was demonstrated with a correlation between the percentage of motile sperm andretention of sperm by the filter of r = -0.87 (P he proportion ofsperm retained by the filter despite inhibiting sperm motility during filtration, an inhibition which was reversible. Pro-portions of live-dead sperm, based upon eosin staining, were unaffected by fluoride. Coating the glass spheres with sil-icone greatly reduced selective filtration. Dead sperm adherence to glass was reduced and resistance to NaFl inhibitionwas increased by daily ejaculation versus one-week intervals of sexual rest. Conclusion; These studies indicate thatthe adherence of sperm to glass is primarily due to some form of physico-chemical change accompanying death of thesperm cell independent of active sperm motility. This attraction between the sperm plasma membrane and glass is modi-fied by the age of the ejaculated sperm. This information is useful in evaluating different clinical procedures used forsperm separation. (Asian J Androl 2001 Sep; 3: 193-198)

关键词： sperm motility glass spere filters silicone fluorides inhibition

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非增强7 TMRI中未破裂的颅内动脉瘤的表现:与数字减影血管造影对比

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国际医学放射学杂志 2017年第2期 233-234页

作者： K.h.Wrede T.Matsushige S.L.Goericke B.Chen L.Umutlu h.h.quick 有慧 Erwin L. hahn Institute for Magnetic Resonance Imaging University Duisburg -Essen

摘要目的通过与DSA比较,前瞻性评价7 T非对比增强MRA对未破裂颅内动脉瘤(UIA)的显示。方法本研究经伦理委员会批准,共纳入40例单发或多发的UIA病例。在

关键词： MRA TMRI DSA

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Use of virtual reality in underground roof fall hazard assessment and risk mitigation

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International Journal of Mining Science and Technology 2019年第4期29卷 603-607页

作者： E.Isleyen h.S.Duzgun Department of Mining Engineering Colorado School of Mines

Virtual reality(VR)simulations are some of the alternative practice environments for safety *** gain experience under the most realistic conditions without being exposed to any real *** reality also serves as a tool to expedite the decision-making process where quick decisions and actions are necessities for a safe *** example of such a situation in underground mines is the failure risks in a tunnel face after *** support systems must be installed based on the stand-up time to ensure the safe access of personnel and equipment to the working ***,a competent person inspects the area to identify risks and determines the required support ***,training of a competent person requires large amount of time and *** study presents virtual reality simulations developed for improving the assessment of the roof fall hazards and taking necessary measures for mitigating the risk related to roof *** virtual reality simulation involves decision-making tasks for a particular scenario in which participants can experience creating a safe working environment in a timely ***,they are asked to identify the potential hazard in a tunnel after blasting,namely,rock fall,wedge failure or groundwater *** the hazard identification is successful,participants are requested to install rock bolts as a safety measure by selecting the bolt pattern(*** length and spacing).Finally,participants evaluate the roof fall hazard by viewing displacements around the opening,before and after the support *** study illustrates the benefits of VR in safety training as well as enhancing the decision-making process to enhance safety.

关键词： Virtual reality hazard assessment Tunneling

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胼胝体下动脉的显微解剖学:一项基于7.0 T MRA的研究

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国际医学放射学杂志 2016年第6期 697-698页

作者： T.Matsushige B.Chen P.Dammann S.Johst h.h.quick M.E.Ladd 杨楠 Department of Neurosurgery University Hospital EssenUniversity Duisburg-Essen

摘要目的采用7.0 T TOF MRA研究前交通动脉的分支胼胝体下动脉的显微解剖。方法本项研究共募集75例被试,其中正常对照组15例,病例组60例。在7.0 T TOF MRA

关键词：胼胝体分支显微解剖大脑皮质 T MRA 动脉

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应用心电门控单次激发半径反转恢复MRI序列的心肌T1定量

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国际医学放射学杂志 2015年第3期 274-275页

作者： D.Gensler P.Morchel F.Fidler O.Ritter h.h.quick M.E.Ladd 陈丽烨 Research Center Magnetic-Resonance-Bavaria

目的提出并验证一种快速心脏MRI的T1mapping,该技术基于扰相梯度回波半径反转恢复序列(IR),影像具有较高的空间分辨力。方法本研究由当地伦理审查委员

关键词：单次激发反转恢复 T1 MRI 序列心肌心电门控

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三重TWISTMRA:采用具有时间分辨率4DMRA技术对全部外周血管系统成像的高空间和时间分辨力MR血管成像

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国际医学放射学杂志 2013年第2期 192-193页

作者： S. Kinner h.h. quick S. Maderwald P. hunold J.B. khausen F.M. Vogt 郭凌飞 Department of Diagnostic and Interventional Radiology and Neuroradiology University Hospital Essen Hufelandstrasse 5545122 EssenGermany

目的多方位对比增强MR血管成像是外周动脉狭窄病人的首选成像检查方法。为了避免静脉的影响并获得数字减影血管造影(DSA)所能提供动态血流信息,开发了对整个外周动脉系统进行高分辨力MRA的三重注射方法,采用具有时间分辨率(TR)的四维(4D... 详细信息

目的多方位对比增强MR血管成像是外周动脉狭窄病人的首选成像检查方法。为了避免静脉的影响并获得数字减影血管造影(DSA)所能提供动态血流信息,开发了对整个外周动脉系统进行高分辨力MRA的三重注射方法,采用具有时间分辨率(TR)的四维(4D)MRA成像序列。材料与方法 10例病人接受了盆腔及下肢三方位TR-MRA检查,以DSA检查结果作为参考标准。对每一段血管相关的狭窄进行了比较。此外,28例随机选取的病人只接受了相同的MR检查。所有的影像都进行了影像质量(1=不能诊断,4=优秀)、静脉重叠(从没有到显影)、静脉增强时间(极早/早/正常/晚)的评估。结果三方位TR-MRA检查证明是可行的,与DSA结果相比,有282个血管节段相符合,有4个血管节段的狭窄程度被低估,4个血管节段被高估。38例病人中有32例没有出现静脉的重叠,6例病人出现中度重叠。大部分病例的影像质量被评为优秀或良好。结论 TR-MRA成像具有最佳的动脉增强效果、较高的空间分辨力、无静脉重叠、无需时机选择等优点,它可以提供形态和功能信息。要点①对比增强MR血管成像已被广泛采用。②TR-MRA可以提供没有静脉重叠的动态的动脉血流信息。③TR-MRA与DSA对血管狭窄的评估具有可比性。④TR-MRA可以提供显示外周血管系统高质量的影像。

关键词：周围血管疾病对比增强MR血管成像数字减影血管造影静脉重叠

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