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运用心脏低辐射剂量CT评估心肌间质纤维化的细胞外体积分数

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国际医学放射学杂志 2012年第6期 583-583页

作者： M.S.Nacif N.Kawel j.j.Lee A.Zavodni 卢平明郑晶晶 Department of Radiology and Imaging Sciences National Institutes of Health Clinical Center10 Center DrBldg 10Room 1C355BethesdaMD 20892-1182

摘要目的优化心脏CT扫描方法来获取细胞外体积(ECV)分数,将心脏MR成像作为参考标准。材料与方法该研究经制度审查委员会批准,且参与者签署了知情同意书。行心脏CT和心脏MR检查对健康受试者和心力衰竭病人的ECV进行测量

关键词：心肌 ECV MR 心脏细胞外 CT

孕期妇女补充微量元素对子代6～8岁时代谢综合症指征的影响

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营养健康新观察 2009年第3期 45-45页

作者： Christine P.Stewart Parul Christine Kerry j.Schulze Stever C.LeClerq Keith P.West j. Subarna K.Khatry 张喆庆 Postdoctoral Fellow Center for Human NutritionJohns Hopkins Bloomberg School of Public Health

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Free-breathing radial volumetric interpolated breathhold examination vs breath-hold cartesian volumetric interpolated breath-hold examination magnetic resonance imaging of the liver at 1.5T

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World j.urnal of Radiology 2016年第7期8卷 707-715页

作者： Sireesha Yedururi HyunSeon C Kang Wei Wei Nicolaus A Wagner-Bartak Leonardo P Marcal R j.son Stafford Brandy j.Willis j.nio Szklaruk Department of Diagnostic Radiology the University of Texas MD Anderson Cancer Center Department of Biostatistics the University of Texas MD Anderson Cancer Center Department of Imaging Physics the University of Texas MD Anderson Cancer Center

AIM: To compare breath-hold cartesian volumetric interpolated breath-hold examination(cVIBE) and freebreathing radial VIBE(rVIBE) and determine whether rVIBE could replace cVIBE in routine liver magnetic resonance imaging(MRI).METHODS: In this prospective study, 15 consecutive patients scheduled for routine MRI of the abdomen underwent pre- and post-contrast breath-hold cVIBE imaging(19 s acquisition time) and free-breathing rVIBE imaging(111 s acquisition time) on a 1.5T Siemens scanner. Three radiologists with 2, 4, and 8 years post-fellowship experience in abdominal imaging evaluated all images. The radiologists were blinded to the sequence types, which were presented in a random order for each patient. For each sequence, the radiologists scored the cVIBE and rVIBE images for liver edge sharpness, hepatic vessel clarity, presence of artifacts, lesion conspicuity, fat saturation, and overall image quality using a five-point scale. RESULTS: Compared to rVIBE, cVIBE yielded significantly(P < 0.001) higher scores for liver edge sharpness(mean score, 3.87 vs 3.37), hepatic-vessel clarity(3.71 vs 3.18), artifacts(3.74 vs 3.06), lesion conspicuity(3.81 vs 3.2), and overall image quality(3.91 vs 3.24). cVIBE and rVIBE did not significantly differ in quality of fat saturation(4.12 vs 4.03, P = 0.17). The inter-observer variability with respect to differences between rVIBE and cVIBE scores was close to zero compared to random error and inter-patient variation. Quality of rVIBE images was rated as acceptable for all parameters. CONCLUSION: rVIBE cannot replace cVIBE in routine liver MRI. At 1.5T, free-breathing rVIBE yields acceptable, although slightly inferior image quality compared to breath-hold cVIBE.

关键词： Liver magnetic resonance imaging Radial imaging Free-breathing magnetic resonance acquisition

RETINAL NERVE FIBER LAYER MEA-SUREMENTS ARE NOT CHANGED FOL-LOWING LASER IN-SITU KERATOMILEU-SIS (LASIK) FOR HIGH MYOPIA AS MEA-SURED BY SCANNING LASER PO-LARIMETRY WITH CUSTOM COMPENSA-TION FOR ANTERIOR SEGMENT BIRE-FRINGENCE

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国际眼科杂志 2003年第1期3卷 59-59页

作者： N.T.Choplin S.C.Schallhorn D.Tanzer j.L.Tidwell Q.Zhou M.Sinai Uniformed Services Univer-sity of Health Sciences MD and Laser Diagnostic Technologies Inc. CA USAUniformed Services Univer-sity of Health Sciences MDUniformed Services Univer-sity of Health Sciences MDUniformed Services Univer-sity of Health Sciences MDLaser Diagnostic Technologies Inc. CA USALaser Diagnostic Technologies Inc. CA USA

Purpose: Scanning laser polarimetry (SLP) estimates retinal nerve fiber layer (RNFL) thickness through measurement of retardation of polarized light passing through the birefringent RNFL and cornea. A variable compensation method is incorporated to eliminate the anterior segment contribution to the total birefringence measured. LASIK is a technique that corrects myopia by ablating corneal tissue. This study evaluated RNFL mea-

关键词： LASIK 高度近视术后视网膜神经纤维层厚度扫描激光旋光法测量补偿

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Study of the Thermal Field Upstream and Downstream of Two Heat Sources Placed in the Turbulent Flow of the Ambient Air Cooled through an Air-Ground Heat Exchanger

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j.urnal of Energy and Power Engineering 2019年第8期13卷 292-311页

作者： B.S.Tagne-Kaptue Oumarou Hamandj.da B.Kenmeugne j.Kenfack A.Kanmogne L.Meva’a D.Ndapeu Department of Mechanical and Industrial Engineering ENSPUniversity of YaoundéIP.O.Box 8390YaoundéCameroon Department of Mechanical and Production Engineering University InstituteFotso VictorBandjounUniversity of DschangP.O.Box 134BandjounKoung KhiCameroon

In order to more easily highlight the influence of cooled ambient air through an air-ground heat exchanger on the process of diffusion and mixing of heat around an electronic component and a photovoltaic solar module, we undertook to study the thermal field beforehand. The turbulent model has applied a realizable k-ε two equations model and the two-dimensional Reynolds Averaged Navier-Stokes (RANS) equations are discretized with the second order upwind scheme. The SIMPLE algorithm, which is developed using control volumes, is adopted as the numerical procedure. Calculations were performed for a wide variation of the Reynolds numbers. Our results reveal, on the one hand, that the use of an air-ground heat exchanger accelerates the dispersion of the thermal field around the PV panel. On the other hand, with increasing Reynolds number, the instabilities appear in the wake zone, showing an oscillatory flow, also called von Karman Vortex Street. Our air-ground heat exchanger has an important influence on the diffusion process of the thermal field. Comparison of numerical results with the experimental data available in the literature is satisfactory.

关键词： Passive scalar linear heat source PV module turbulent flow CFD.

下腔静脉可吸收血栓滤器预防猪肺栓塞的安全性和有效性

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国际医学放射学杂志 2018年第1期 101-101页

作者： S.Y.Huang M.Eggers M.j.Mc Arthur K.A.Dixon A.Mc Watters S.Dria 周波 Department of Interventional Radiology University of Texas MD Anderson Cancer Center

摘要目的采用猪模型评价可吸收血栓滤器植入下腔静脉(IVC)后的即时和长期安全性,以及5周内血栓捕捉效果。材料与方法这项研究已获得动物管理和使用机构委员

关键词：可吸收肺栓塞下腔静脉

MRI上的椎骨终板信号(Modic)改变,正如已经研究的激发的椎间盘造影术一样,具有临床相关性——对2457个椎间盘的回顾性研究

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国际医学放射学杂志 2009年第3期 282-282页

作者： K.j.Thompson A.P.Dagher T.S.Eckel M.Clark j.W.Reinig 卞读军 Annapolis Spine Institute 2002 Medical PkwySuite 235AnnapolisMD 21401USA

目的评估MRI上椎骨终板信号改变(Modic)对预测疼痛性椎间盘的价值,并用激发的椎间盘造影术作为参考标准。方法本回顾性分析获机构审查委员会批准,符合HIPAA。对736例病人(2457个椎间盘)进行腰椎椎间盘X线造影及在X线造影前的MRI检查。... 详细信息

目的评估MRI上椎骨终板信号改变(Modic)对预测疼痛性椎间盘的价值,并用激发的椎间盘造影术作为参考标准。方法本回顾性分析获机构审查委员会批准,符合HIPAA。对736例病人(2457个椎间盘)进行腰椎椎间盘X线造影及在X线造影前的MRI检查。每个椎间盘终板信号改变分4个亚型:0型,正常;1型,无脂肪高信号强度;2型,含脂肪;3型,硬化。

关键词：终板 Modic MRI 椎间盘突出脊柱病椎骨

锥形束CT血管成像对肝转移瘤病人偶发富血供微小结节的预后价值

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国际医学放射学杂志 2018年第1期 116-116页

作者： B.C.Odisio V.L.Cox S.C.Faria S.Yamashita X.Shi j.Ensor 毛凡 Department of Interventional Radiology Division of Diagnostic ImagingThe University of Texas MD Anderson Cancer Center

摘要目的探讨锥形束CT血管成像(CBCTA)检出经过肝动脉(化学)栓塞术(TACE/TAE)后的肝转移瘤病人偶然发现富血供微小结节(IHM)的临床相关性。材料与方法此单

关键词：肝转移瘤微小结节血管成像锥形束 CT

慢性复发性多灶性骨髓炎:MR全身成像与X线平片的对比及与临床和实验室数据的相关性研究

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国际医学放射学杂志 2009年第6期 579-579页

作者： j.Fritz N.Tzaribatchev C.D.Claussen j.A.Carrino M.S.Horger 周淑琴 Russell H.Morgan Department of Radiology and Radiological Science Johns Hopkins University School of Medicine601 N Caroline StJHOC 5165BaltimoreMD 21287Germany

目的描述慢性复发性多灶性骨髓炎(CRMO)的MRI表现,评价MRI与X线平片对CRMO的诊断价值,并研究CRMO的MRI表现与临床症状和实验室检查的相关性。材料与方法本项回顾性研究经伦理委员会批准,遵循HIPAA法案,豁免病人知情同意。对13例CRMO患儿... 详细信息

目的描述慢性复发性多灶性骨髓炎(CRMO)的MRI表现,评价MRI与X线平片对CRMO的诊断价值,并研究CRMO的MRI表现与临床症状和实验室检查的相关性。材料与方法本项回顾性研究经伦理委员会批准,遵循HIPAA法案,豁免病人知情同意。对13例CRMO患儿(中位

关键词：全身成像多灶性骨髓炎多骨疽 MR 平片素片复发性