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3.0T 3D各向同性快速自旋回波MR成像与常规MR成像在膝关节病变综合评价的对照研究

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国际医学放射学杂志 2009年第5期32卷 499-499页

作者： R.Kijowski K.W.Davis M.A.Woods M.J.Lindstrom A.A.De Smet G.E.Gold 白荣杰 Department of Radiology University of WisconsinClini-cal Science Center-E3/311600 Highland AveMadisonWI 53792U-nited States of America

目的明确3．0T三维各向同性快速自旋回波序列（FSE—Cube）在评价有临床症状病人膝关节软骨、韧带、半月板及骨性结构方面是否与常规MR成像相似。材料与方法本前瞻性研究符合HIPPA要求，经学术审核委员会批准免除知情同意书。100例有临... 详细信息

目的明确3．0T三维各向同性快速自旋回波序列（FSE—Cube）在评价有临床症状病人膝关节软骨、韧带、半月板及骨性结构方面是否与常规MR成像相似。材料与方法本前瞻性研究符合HIPPA要求，经学术审核委员会批准免除知情同意书。100例有临床症状病人（男54例，中位年龄32岁；女46例，中位年龄33岁）接受了快速自旋回波序列和常规3．0TMR附加FSE—Cube的序列扫描，随后行膝关节镜手术。

关键词：快速自旋回波序列 MR成像各向同性膝关节病变综合评价膝关节镜手术临床症状中位年龄

CT结肠成像在老年筛查人群中的执行和项目结果衡量

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国际医学放射学杂志 2010年第2期 183-183页

作者： D.H.Kim P.J.Pickhardt M.E.Hanson J.L.Hinshaw 高欣 Department of Radiology University of Wisconsin School of Medicine and Public HealthE3/311 Clinical Science Center600 Highland AveMadisonWI 53792-3252USA

目的评估一项大规模结直肠癌筛查项目中CT结肠成像在老年人群(65～79岁)中建立的执行和项目结果。材料与方法该研究符合HIPPA法案,获机构审查委员会认可,无需

关键词：结肠成像结直肠癌筛查高级别瘤变 CT

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阑尾长度是急性阑尾炎的独立风险因素

国际医学放射学杂志 2014年第1期 96-96页

作者： J.P.Pickhard J.Suhonen E.M.Lawrence A.M.del Rio B.D.Pooler 石伟 Department of Radiology University of Wisconsin School of Medicine & Public Health E3/311 Clinical Science Center600 Highland Ave. Madison WI 53792-3252 USA

目的确定急性阑尾炎和无症状对照组之间阑尾长度是否存在差异。方法比较321例手术证实为阑尾炎的病人与连续的321例无症状成人CT上所见阑尾长度。在沿

关键词：阑尾炎阑尾多层CT 解剖学

应用优先图像强制压缩传感算法降低低剂量MDCT腹部影像噪声的研究

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国际医学放射学杂志 2011年第5期 480-480页

作者： M.G.Lubner P.J.Pickhardt 付姣慧 Departments of Radiology and Medical Physics University of Wisconsin School of Medicine and Public HealthE3/31 Clinical Science Center600 Highland AveMadisonWI 53792-3252

目的评价优先图像强制压缩传感算法(PICCS)在低剂量MDCT噪声降低方面的价值及其影像质量。材料与方法本研究获机构审查委员会批准(免除知情同意书)并符合

关键词：低剂量 MDCT 结肠成像腹部影像压缩传感 FBP 影像质量图像算法

CT结肠成像筛查阴性的大队列研究中5年结直肠癌发病率

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国际医学放射学杂志 2012年第5期 496-496页

作者： D.H.Kim B.D.Pooler J.M.Weiss P.J.Pickhardt 史玉振 Department of Radiology University of Wisconsin School of Medicine and Public HealthE3/311 Clinical Science Center600 Highland Ave.MadisonWI 53792-3252USA

摘要目的因为缺乏CT结肠成像(CTC)筛查阴性病人长期结果的数据,本研究的目的是评估5年内有结直肠癌临床表现而CTC表现为阴性的病人的发病率。方法纳入威斯康辛大学医疗系统14个月期间CTC筛查阴性的病人1050例,对包括提供者、结肠镜、影... 详细信息

摘要目的因为缺乏CT结肠成像(CTC)筛查阴性病人长期结果的数据,本研究的目的是评估5年内有结直肠癌临床表现而CTC表现为阴性的病人的发病率。方法纳入威斯康辛大学医疗系统14个月期间CTC筛查阴性的病人1050例,对包括提供者、结肠镜、影像学和病理学报告在内的电子医学病历(EMR)进行回顾性分析。记录结直肠癌以及其他严重的胃肠道肿瘤的发病率。

关键词： CT结肠成像胃肠筛查腺癌高级别腺瘤

原发性肝血管肉瘤:对35例病人多期相CT及MR成像的多机构综合癌症中心研究

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国际医学放射学杂志 2015年第2期 196-196页

作者： P.J.Pickhardt D.Kitchin M.G.Lubner D.M.Ganeshan S.Bhalla A.M.Covey 李宁 Department of Radiology University of Wisconsin School of Medicine & Public Health E3/311 Clinical Science Center 600Highland Ave Madison WI 53792 -3252 USA

摘要目的评价原发性肝血管肉瘤多期相CT及MRI的影像特征。方法多机构研究经病理证实确诊为肝血管肉瘤的35例成年病人(平均年龄57.1岁,男22例,女13例)

关键词：肝血管肉瘤 MR 原发性病人 CT

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光学结肠镜漏诊的腺瘤的定位

世界核心医学期刊文摘（胃肠病学分册） 2005年第2期1卷 1-1页

作者： Pickhardt P.J. Nugent P.A. Mysliwiec P.A. 陈云茹 Departme nt of Radiology Univ. of Wisconsin Medical School E3/311 Clinical Science Cent er 600 Highland Avenue Madison WI 53792-3252 United StatesDr.

Background: Previous estimates of the adenoma miss rate with optical colonosco py (OC) are hindered by the use of OC as its own reference standard. Objective: To evaluate the frequency and characteristics of colorectal neoplasms that are m issed prospectively on OC by using virtual colonoscopy (VC) as a separate refere nce standard. Design: Prospective, multicenter screening trial. Setting: 3 medic al centers. Participants: 1233 asymptomatic adults who underwent same day VC an d OC. Measurements: Colorectal neoplasms (adenomatous polyps) missed at OC befor e VC results were unblinded. Results: Fourteen (93.3%) of 15 nonrectal neoplasm s were located on a fold; 10 (71.4%) of these were located on the backside of a fold. Five (83.3%) of 6 rectal lesions were located within 10 cm of the anal v erge. Limitations: Estimation of the OC miss rate depended on polyp detection on both VC and second look OC and therefore under estimates the true OC miss rat e, particularly for smaller polyps. Conclusions: Most clinically significant ade nomas missed prospectively on OC are located behind a fold or near the anal verg e. The 12%OC miss rate for large adenomas (≥10 mm) when state of the art 3 dimensional VC is used as a separate reference standard is increased from the previous 0%to 6%estimates derived by using OC as its own reference standard.

关键词：结肠镜腺瘤性息肉大腺瘤直肠肿瘤无症状筛选实验估计值最新型

Some Characteristics of Cumulus Convection over the Tibetan Plateau

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Advances in Atmospheric Sciences 1990年第1期7卷 87-97页

作者：段廷扬 Elmar R.Reiter Chengdu Institute of Meteorology Chengdu 610041 Sichuan Province Center lor Cybernetic Communication Research Colorado Slate University Fort Collins CO.80523 U. S. A.he diagnostic model of the cumulus convection proposed by Yanai et al. (1973) was applied to the atmosphere over the Tibetan Plateau and used to estimate the vertical mass flux entrainment and detrainment excess temperature and moisture liquid water content and condensation and precipitation rates of highland cloud clusters. The results illustrated that in clouds over the Tibetan Plateau the water vapor condensation rate liquid water content and efficiency of the rain generation process are less than those in the tropics (represented by the Marshall Islands region). Therefore the condensational latent heat released over the Tibetan Plateau overall is much smaller than that in the tropics. The water vapor and liquid water detrainment from shallow nonprecipitating cumulus clouds and their entrainment into deep cumulus clouds serve as a growing mechanism for the deep precipitating cumulus towers over the Tibetan Plateau. It should be noted that there is a stronger detrainment of liquid water from cumulus clouds and a stronger re-evaporation rate in environment. The process of the condensation-detrainment-re-evaporation-cnlrainmcnt is repeatedly in progress. It would play an important role in maintaining of cumulus convection on the condition that the supply of moisture is not plentiful over the Tibetan Plateau.The analyses also showed that the cloud mass flux Mc over the Tibetan Plateau is less and the large-scale average upward motion is much less than those over the Marshall Islands. Stronger compensating downward motion in the cloud environment over the Tibetan Plateau responsible for the area's strong environmental heating rate Was revealed and would link to the stability of the South Asian High in summer.

The diagnostic model of the cumulus convection proposed by Yanai et al. (1973) was applied to the atmosphere over the Tibetan Plateau, and used to estimate the vertical mass flux, entrainment and detrainment, excess temperature and moisture, liquid water content, and condensation and precipitation rates of highland cloud clusters. The results illustrated that in clouds over the Tibetan Plateau, the water vapor condensation rate, liquid water content, and efficiency of the rain generation process are less than those in the tropics (represented by the Marshall Islands region). Therefore, the condensational latent heat released over the Tibetan Plateau, overall, is much smaller than that in the tropics. The water vapor and liquid water detrainment from shallow nonprecipitating cumulus clouds, and their entrainment into deep cumulus clouds, serve as a growing mechanism for the deep precipitating cumulus towers over the Tibetan Plateau. It should be noted that there is a stronger detrainment of liquid water from cumulus clouds and a stronger re-evaporation rate in environment. The process of the condensation-detrainment-re-evaporation-cnlrainmcnt is repeatedly in progress. It would play an important role in maintaining of cumulus convection on the condition that the supply of moisture is not plentiful over the Tibetan *** analyses also showed that the cloud mass flux Mc over the Tibetan Plateau is less, and the large-scale average upward motion is much less than those over the Marshall Islands. Stronger compensating downward motion in the cloud environment over the Tibetan Plateau, responsible for the area's strong environmental heating rate Was revealed, and would link to the stability of the South Asian High in summer.

关键词： Some Characteristics of Cumulus Convection over the Tibetan Plateau over