检索结果-南通市图书馆

利用自动衰减为基础的管电压选择在心血管CT血管成像中降低辐射剂量和提高影像质量:个体内比较

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2015年第1期 82-83页

作者： A.W.Krazinski F.g.Meinel U.j.Schoepf j.R.silverman C.Canstein C.N.De-Cecco Department of Radiology and Radiological Science Medical University of South Carolina

目的评估自动管电压选择在心血管CT血管成像(CTA)检查中对辐射剂量和影像质量的影响。方法对72例病人[男41例,(60.5±16.5)岁]采用自动X线管电压选择算

关键词：影像质量血管成像管电压 CT 辐射剂量心血管

CT血管成像心包外脂肪组织自动量化技术:原型软件评估

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2014年第2期 202-203页

作者： j.V.Spearman F.g.Meinel U.j.Schoepf P.Apfaltrer j.R.silverman A.W.Krazinski 张萌萌 Department of Radiology and Radiological Science Medical University of South CarolinaAshley River Tower 25 Courtenay DriveCharlestonSC 29425-2260USA

目的本研究旨在评估一种新颖的自动化软件工具,定量测量冠状动脉CT血管成像(cCTA)心外脂肪容积(EFV),并与标准的人工方法进行比对。材料与方法使用两

关键词：心包外脂肪组织心脏计算机体层成像原型动脉粥样硬化心血管危险因素

抗血栓治疗知识(四) 周围血管疾病的抗栓治疗

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

英国医学杂志中文版 2004年第4期7卷 231-234页

作者： Andrew j Makin Stanley H silverman gregory Y H Lip 王维民 university department of medicine City Hospital Birmingham City Hospital Birmingham university department of medicine City Hospital Birmingham

以间歇性跛行为临床表现的周围血管动脉粥样硬化性疾患，好发于60岁以上男性（2%～3%）和女性（1%～2%）。但无症状的周围血管疾病常表现为从踝到臂的收缩压指数降低，其发生率高于前者3-4倍。周围血管疾病也是住院的主要原因及预测心... 详细信息

以间歇性跛行为临床表现的周围血管动脉粥样硬化性疾患，好发于60岁以上男性（2%～3%）和女性（1%～2%）。但无症状的周围血管疾病常表现为从踝到臂的收缩压指数降低，其发生率高于前者3-4倍。周围血管疾病也是住院的主要原因及预测心血管病死亡率的重要指标。静息痛现严重的缺血常常是动脉粥样硬化疾病进展的结果，可引起多水平的动脉阻塞。

关键词：周围血管疾病抗栓治疗间歇性跛行为严重缺血血管移植

高刚度、低热膨胀系数的热塑料复合材料航天器结构的设计

在线全文

学校读者我要写书评

暂无评论

国外导弹与航天运载器 1990年第4期 54-65页

作者： E.M.silverman j.E.Sathoff W.C.Forbes 李德清

采用宏观力学原理编制的复合材料层板分析计算机程序来确定普通航天器用热塑性塑料基部件的机械性能和热学性能。用图表方式表示了几种对称的层板镝层顺序按不同的层板铺层角度制造的层板的刚度和热膨胀系数值。评价了用高弹性模量石墨... 详细信息

采用宏观力学原理编制的复合材料层板分析计算机程序来确定普通航天器用热塑性塑料基部件的机械性能和热学性能。用图表方式表示了几种对称的层板镝层顺序按不同的层板铺层角度制造的层板的刚度和热膨胀系数值。评价了用高弹性模量石墨纤维Pitch75增强刚度的热塑性塑料PEEK和用低弹性模量(E=221gPa)的石墨纤维做横向增强的热塑料。研究了一般单向刚性的板状预浸带和最新的可吸音的石墨纤维/PEEK混合编织的纤维织品。选择了单张层状片的铺层角度取向和层板铺放顺序以满足下列设计要求:(1)最低比刚度为172.5gPa(25.0MSi);(2)热膨胀系数为0±1.8×10^(-6)cm/cm℃;(3)板厚范围为0.05～1.3cm。此外,还提供了用超塑膜片成形技术由预浸带和纤维织品两者制成的普通零件上测得的弹性模量和热膨胀系数的实验值并将它与计算机导出的层板性能预测值相比较。

关键词：复合材料航天器结构设计热膨胀

在线全文

学校读者我要写书评

暂无评论

美国三级转诊中心的肝炎构成

世界核心医学期刊文摘（胃肠病学分册） 2005年第7期1卷 44-45页

作者： galan M.V. Potts j.A. silverman A.L. gordon S.C. 徐瑞 William Beaumont Hospital Div. of Gastroenterol. and Hepatol. 3601 West Thirteen Mile Road Royal Oak MI 48073 United States Dr.

Background/goals: There are limited data regarding the frequency and proporti onality of drug- induced hepatotoxicity in the United States. We sought to dete rmine the scope of nonfulminant drug- induced hepatitis as seen in a community - based hepatology referral service. Study: From a population of 4,039 outpatie nts referred for evaluation of acute (n = 96) and chronic (n = 3,943) liver dise ase over a 10- year period, we reviewed the records of those patients diagnosed with acute bona fide drug- induced hepatitis. Results: Thirty- two patients p resented with self- limited acute drug- induced hepatitis, representing 0.8% of all hepatology patients and 33% of those patients presenting with acute li ver injury. Antibiotics (amoxicillin/clavulanic acid, minocycline, nitrofurantoi n, an investigational ketolide antibiotic, trimethoprim- sulfamethoxazole, and trovafloxacin) were the class of drugs most frequently implicated (14 of 32; 44 % ), while amiodarone was the single agent most commonly associated with liver injury (7 of 32; 22% ). The mean age of affected patients was 52.2 years, and w e found a male predominance (18 of 32; 56% ). The mean time to biochemical reso lution after discontinuation of the offending agent was 14.1 weeks. Conclusions: Drug- induced hepatitis is an uncommon entity in clinical hepatology but does represent a significant proportion of acute self- limited liver disease in the United States. Antibiotics and amiodarone were the most common drug culprits in our population. Time to resolution following the discontinuation of the offendin g agent may be protracted. Prospective studies are needed to further assess the burden of drug- induced liver injury.

关键词：慢性肝病患者自限性米诺四环素药物性肝损害肝脏疾病急性肝损害甲氧苄啶肝脏损害肝脏病呋喃妥因

感染高致病性禽流感病毒时肉鸡和蛋鸡的病理变化

在线全文

学校读者我要写书评

暂无评论

上海畜牧兽医通讯 1986年第1期 44-46页

作者： H.M.Acland L.A.silverman Bochin R.j.Eckroade 王兆久

自1929迄今,北美鸡未曾再有类似鸡瘟疾病的严重暴发。我们描述的有病变的15羽鸡,5羽来自肉鸡群,10羽来自两个蛋鸡群,这些鸡群都是从1983年宾夕法尼亚开始爆发的一次高病致性禽流感病毒感染中发病的。

关键词：病变高致病性禽流感病毒

经胎盘治疗可改善产前诊断为无结构性心脏病的完全性房室传导阻滞胎儿的预后

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（心脏病学分册） 2005年第2期1卷 22-23页

作者： jaeggi E.T. Fouron j.-C. silverman E.D. 郝广华 Fetal Cardiology Hospital for Sick Children 555 University Ave Toronto Ont. M5G 1X8 Canada Dr.

Background Untreated isolated fetal complete atrioventricular block(CAVB) has a significant mortality rate. A standardized treatment approach, including mate rnal dexamethasone at CAVB diagnosis and β stimulation for fetal heart ratesge at diagnosis was 25.6±5.2 gestational weeks. In 33 patients (92%), CAVB was associated with maternal anti Ro/La aut oantibodies. Patients were separated into those diagnosed between 1990 and 1996 (group 1; n=16) and those diagnosed between 1997 and 2003 (group 2; n=21). The 2 study groups were comparable in the clinical presentation at CAVB diagnosis but did differ in prenatal management (treated patients: group 1, 4/16; group 2, 18 /21; Pgroup 1 were 80%and 47%, and these improved to 95%for group 2 pat ients (Pglucocorticoid therapy (Pg in p ostnatal death or heart transplantation were significantly more common in untrea ted anti Ro/La antibody associated pregnancies compared with patients treated with steroids (0/18 versus 4/9 live births; P=0.007). Conclusions -A standardiz ed treatment approach, including transplacental fetal administration of dexameth asone and β stimulation at heart rates< 55 bpm,reduced themorbidity and improv ed the outcome of isolated fetal CAVB.

关键词：产前诊断房室传导阻滞活产率心脏移植激动剂标准治疗方案平均胎龄自身抗体免疫介导心肌病

在线全文

学校读者我要写书评

暂无评论

中年罹患糖尿病和其30年后并发痴呆的风险

世界核心医学期刊文摘（神经病学分册） 2005年第5期1卷 30-31页

作者： Schnaider Beeri M. goldbourt U. silverman j.M. 李一明 Mount Sinai School of Medicine Department of Psychiatry Box 1230 One Gustave Levy Place New York NY 10029 United States Dr.

Objective: To examine the association between diabetes in midlife (1963- 196 8) and dementia more than three decades later (1999- 2001). Methods: The author s characterized dementia using standard methods for 1,892 participants among 2,6 06 survivors of 10,059 participants in the Israeli Ischemic Heart Disease study, a longitudinal investigation of the incidence of and risk factors for cardiovas cular disease among jewish male civil servants in Israel. Face to face interview s were conducted with the 652 subjects identified as possibly demented by the Mo dified Telephone Interview for Cognitive Status. Logistic regression analysis wa s performed to assess the association of diabetes with dementia controlling for sociodemographic and cardiovascular variables compared to those with no cognitiv e impairment. Results: Of 1,892 assessed subjects (mean age 82 at assessment), 3 09 (16.3% ) had dementia. Diabetic subjects had significantly more dementia tha n non-diabetic subjects (χ 2 = 7.54, df = 1, p = 0.006, OR 2.83 [95% CI = 1 .40 to 5.71]). Those who survived to the time of this study were younger and hea lthier than those who died. Conclusions: Evidence for diabetes as a risk factor for dementia was found, similar to other epidemiologic studies. In contrast to t he earlier studies, however, the authors linked diabetes in midlife to dementia more than three decades later in the very old survivors of a large male cohort.

关键词：缺血性心脏病持续状态认知障碍电话访谈流行病学研究国家公务员人口统计学心血管疾病纵向调查队列研究

Optical force-induced nonlinearity and self-guiding of light in human red blood cell suspensions

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2019年第1期8卷 927-935页

作者： Rekha gautam Yinxiao Xiang josh Lamstein Yi Liang Anna Bezryadina guo Liang Tobias Hansson Benjamin Wetzel Daryl Preece Adam White Matthew silverman Susan Kazarian jingjun Xu Roberto Morandotti Zhigang Chen Department of Physics and Astronomy San Francisco State UniversitySan FranciscoCA 94132USA Department of Biomedical Engineering Vanderbilt UniversityNashvilleTN 37240USA MOE Key Lab of Weak-Light Nonlinear Photonics TEDA Applied Physics Institute and School of PhysicsNankai UniversityTianjin 300457China guangxi Key Lab for Relativistic Astrophysics Guangxi Colleges and Universities Key Lab of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004China Department of Physics and Astronomy California State University NorthridgeNorthridgeCA 91330USA Institut National de la Recherche Scientifique Universite du QuebecVarennesQC J3X 1S2Canada Department of Physics Chemistry and BiologyLinkoping UniversityLinkoping SE-58183Sweden School of Mathematical and Physical Sciences University of SussexSussex HouseFalmerBrighton BN19RHUK Department of Biomedical Engineering University of California IrvineIrvineCAUSA Clinical Laboratory Science Program San Francisco State UniversitySan FranciscoCA 94132USA Institute of Fundamental and Frontier Sciences University of Electronic Science and Tech.of ChinaChengdu 610054China ITMO University Saint Petersburg 197101Russia

Osmotic conditions play an important role in the cell properties of human red blood cells(RBCs),which are crucial for the pathological analysis of some blood diseases such as *** the past decades,numerous efforts have mainly focused on the study of the RBC biomechanical properties that arise from the unique deformability of ***,we demonstrate nonlinear optical effects from human RBCs suspended in different osmotic ***,we observe self-trapping and scattering-resistant nonlinear propagation of a laser beam through RBC suspensions under all three osmotic conditions,where the strength of the optical nonlinearity increases with osmotic pressure on the *** tunable nonlinearity is attributed to optical forces,particularly the forward-scattering and gradient ***,in aged blood samples(with lysed cells),a notably different nonlinear behavior is observed due to the presence of free *** use a theoretical model with an optical force-mediated nonlocal nonlinearity to explain the experimental *** work on light self-guiding through scattering biosoft-matter may introduce new photonic tools for noninvasive biomedical imaging and medical diagnosis.

关键词： nonlinearity suspensions nonlinear