检索结果-南通市图书馆

Velocity structure of uppermost mantle beneath North China from Pn tomography and its implications

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2003年第Z2期46卷 130-140页

作者： WANG Suyun (汪素云) XU Zhonghuai (许忠淮) PEI Shunping (裴顺平) Institute of Geophysics China Seismological Bureau Beijing 100081 China Institute of Geophysics China Seismological Bureau Beijing 100081 China Institute of Geophysics China Seismological Bureau Beijing 100081 China

20301 Pn arrival time data are collected from the seismological bulletins of both national and regional seismic networks. Pn travel time residuals are tomographically inverted for the Pn velocity structure of uppermost mantle beneath North China. The result indicates that the average Pn velocity in North China is 7.92 km/s, and the velocity varies laterally from ?0.21 to +0.29 km/s around the average. The approximately NNE trending high and low velocity regions arrange alternatively west-eastward. From west to east we can see high velocity in the middle Ordos region, the Shanxi graben low, the Jizhong depression high, the west Shandong uplift and Bohai Sea low, and the high velocity region to the east of the Tanlu fault. In the southern boundary zone of the North China block, except for the high velocity in the Qingling Mountains region, the velocity is generally lower than the average. Obvious velocity anisotropy is seen in the Datong Cenozoic volcanic region, with the fast velocity direction in NNE-SSW. Notable velocity anisotropy is also seen around the Bay of Bohai Sea, and the fast velocity directions seem to show a rotation pattern, possibly indicating a flow-like deformation in the uppermost mantle there. The Pn velocity variations show a reversed correlation with the Earth's heat flow. The low Pn velocity regions generally show high heat flow, e.g., the Shanxi graben and Bohai Sea region. While the high Pn velocity regions usually manifest low heat flow, e.g., the region of Jizhong depression. This indicates that the Pn velocity variation in the study region is mainly aroused by the regional temperature difference in the uppermost mantle. Strong earthquakes in the crust tend to occur in the region with the abnormal low Pn velocity, or in the transition zone between high and low Pn velocity regions. The earthquakes in the low velocity region are shallower, while that in the transition zone are deeper.

关键词： North China, Pn velocity, seismic tomography, Earth's heat flow, earthquake focal depth.

Comparison of preoperative TN staging of gastric carcinoma by endoscopic ultrasonography with CT examination

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 1997年第4期3卷 44-47页

作者： GUO Wen1, ZHANG YaLi1, LI GuoXing2, ZHOU DianYuan1 and ZHANG WanDai1 Wen Guo Ya-Li Zhang Dian-Yuan Zhou Wan-Dai Zhang PLA Research Institute for Digestive Diseases Department of General Surgery Nanfang Hospital Guangzhou 510515 Guangdong Province China

ＣｏｍｐａｒｉｓｏｎｏｆｐｒｅｏｐｅｒａｔｉｖｅＴＮｓｔａｇｉｎｇｏｆｇａｓｔｒｉｃｃａｒｃｉｎｏｍａｂｙｅｎｄｏｓｃｏｐｉｃｕｌｔｒａｓｏｎｏｇｒａｐｈｙｗｉｔｈＣＴｅｘａｍｉｎａｔｉｏｎＧＵＯＷｅｎ１，ＺＨＡＮ...

ＣｏｍｐａｒｉｓｏｎｏｆｐｒｅｏｐｅｒａｔｉｖｅＴＮｓｔａｇｉｎｇｏｆｇａｓｔｒｉｃｃａｒｃｉｎｏｍａｂｙｅｎｄｏｓｃｏｐｉｃｕｌｔｒａｓｏｎｏｇｒａｐｈｙｗｉｔｈＣＴｅｘａｍｉｎａｔｉｏｎＧＵＯＷｅｎ１，ＺＨＡＮＧＹａＬｉ１，ＬＩＧｕｏＸｉｎ...

关键词： stomach neoplasms/radiography stomach neoplasms/ultrasonography neoplasm staging tomography, Xray computed endoscopy

Findings of non-pathologic perfusion defects by CT arterial portography and non-pathologic enhancement of CT hepatic arteriography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 1998年第6期4卷 58-60页

作者： LI Li, WU Pei Hong, LIN Hao Gao, LI Jin Qing, MO Yun Xian, ZHENG Lie, LU Li Xia, RUAN Chao Mei and CHEN Lin

ＩＮＴＲＯＤＵＣＴＩＯＮＣＴａｒｔｅｒｉａｌｐｏｒｔｏｇｒａｐｈｙ（ＣＴＡＰ）ａｎｄＣＴｈｅｐａｔｉｃａｒｔｅｒｉｏｇｒａｐｈｙ（ＣＴＨＡ）ａｒｅｔｈｅｍｏｓｔｓｅｎｓｉｔｉｖｅｍｅｔｈｏｄｓｏｆｄｅｔｅｃｔｉｎｇｈ...

ＩＮＴＲＯＤＵＣＴＩＯＮＣＴａｒｔｅｒｉａｌｐｏｒｔｏｇｒａｐｈｙ（ＣＴＡＰ）ａｎｄＣＴｈｅｐａｔｉｃａｒｔｅｒｉｏｇｒａｐｈｙ（ＣＴＨＡ）ａｒｅｔｈｅｍｏｓｔｓｅｎｓｉｔｉｖｅｍｅｔｈｏｄｓｏｆｄｅｔｅｃｔｉｎｇｈｅｐａｔｏｃｅｌｕｌａｒｃａｒｃｉ...

关键词： liver neoplasms/radiography carcinoma, hepato cellular/radiography hepatic arteriography tomography, X ray computed

Management of necrotizing pancreatitis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2001年第4期7卷 476-481页

作者： John Slavin Paula Ghaneh Robert Sutton Mark Hartley Peter Rowlands Conall Garvey Mark Hughes John Neoptolemos Departments of Surgery Royal Liverpool University Hospital Departments of Radiology Royal Liverpool University Hospital

Infection complicating pancreatic necrosis leads to persisting sepsis, multiple organ dysfunction syndrome and accounts for about half the deaths that occur following acute pancreatitis. Severe cases due to gallstones require urgent endoscopic sphincterotomy. Patients with pancreatic necrosis should be followed with serial contrast enhanced computed tomography (CE-CT) and if infection is suspected fine needle aspiration of the necrotic area for bacteriology (FNAB) should be undertaken. Treatment of sterile necrosis should initially be non-operative. In the presence of infection necrosectomy is indicated. Although traditionally this has been by open surgery, minimally invasive procedures are a promising new alternative. There are many unresolved issues in the management of pancreatic necrosis. These include, the use of antibiotic prophylaxis, the precise indications for and frequency of repeat CE-CT and FNAB,and the role of enteral feeding.

关键词： pancreatitis, acute necrotizing/drug therapy pancreatitis, acute necrotizing/surgery biopsy,needle tomography, x-ray computered enteral nutrition human

Crust and upper mantle structure of the Ailao Shan-Red River fault zone and adjacent regions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2005年第2期48卷 156-164页

作者： XU Yi LIU Jianhua LIU Futian SONG Haibin HAO Tianyao JIANG Weiwei Institute of Geology and Geophysics Chinese Academy of SciencesBeijing100029China Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China

Using arrival data of the body waves recorded by seismic stations, we reconstructed the velocity structure of the crust and upper mantle beneath the southeastern edge of the Tibetan Plateau and the northwestern continental margin of the South China Sea through a travel time tomography technique. The result revealed the apparent tectonic variation along the Ailao Shan-Red River fault zone and its adjacent regions. High velocities are observed in the upper and middle crust beneath the Ailao Shan-Red River fault zone and they reflect the character of the fast uplifting and cooling of the metamorphic belt after the ductile shearing of the fault zone, while low velocities in the lower crust and near the Moho imply a relatively active crust-mantle boundary beneath the fault zone. On the west of the fault zone, the large-scale low velocities in the uppermost mantle beneath western Yunnan prove the influence of the mantle heat flow on volcano, hot spring and magma activities, however, the upper mantle on the east of the fault zone shows a relatively stable structure similar to the Yangtze block. The low velocities of the deep mantle beneath the southeastern extending segment of the fault zone are probably related to the mantle convection produced by the pull-apart of the South China Sea.

关键词： Ailao Shan-Red River fault zone, seismic tomography, crust and upper mantle, velocity structure.

Clinical Observation of Vascular Dementia Treated by Surrounding-acupuncture of the CT-located Area

在线全文

学校读者我要写书评

暂无评论

Journal of Acupuncture and Tuina Science 2003年第1期1卷 20-21页

作者： LUN Xin FENG Bi-fang RONG Li YANG Wen-hui First Hospital Affiliated to Guangzhou University of TCM Guangdong 510405 China First Hospital Affiliated to Guangzhou University of TCM Guangdong 510405 China First Hospital Affiliated to Guangzhou University of TCM Guangdong 510405 China First Hospital Affiliated to Guangzhou University of TCM Guangdong 510405 China

Purpose To observe the clinical effect of 'Surrounding Needling Technigue through CT Location' in treating vascular dementia. Method Fifty cases of vascular dementia were randomly divided into surrounding Needling Technigue through CT location and routine acupuncture groups, 25 cases in each group,and were given surrounding Needling Technigue through CT location and routine acupuncture respectively. Results The effective rates in surrounding Needling Technigue through CT location and routine acupuncture groups were 88% and 60% respectively, and there was significant difference between the two groups, P ＜ *** Therapeutic effect of surrounding Needling Technigue through CT location in treating vascular dementia was satisfactory, and better than that of routine acupuncture.

关键词： Acupuncture Therapy Dementia,Vascular tomography, X-ray Computed

CT-guided percutaneous thymus microwave radiation and local injection of dexamethasone for myasthenia gravis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Medical Colleges of PLA(China) 2001年第4期16卷 306-308页

作者：王培军吕桃珍涂来慧左长京张仁琴陈炜邵成伟王敏杰刘东明杨继金 Department of Radiology Changhai Hospital Second Military Medical University Shanghai 200433 China

Objective:To developan effectivetherapyformyastheniagravis(MG)***:ThirteenMG patientsreceived2450MHzmicrowaveradiationat multiplepointsof thethymususing CT-guidedpercutaneousthymusparacentesisviatheuppermarginof thesternumincisureandwithlocaldexamethasone ***:Thesymptomsandsignswererelievedwithin3d of treatmentin allthe13MG patients;threehadim-mediateresponseto thetreatmentwithimprovedmyodynamia.A3-yearfollow-upstudyshowedthatthesymptomsand *** thethymusreducedvertically,trans-verselyandanteroposteriorlyby24.2%,31.7%and34.1%***-densityareaswereseenin thethymusdueto watergasificationandcoagulationnecrosisof ***:Thetechniquehasdefinitetherapeuticeffect on MG withadvantagesof easymanipulation,*** suitableforMG patientswithhyper-plasiaor thymoma,andthosewho areunwillingto receivethymectomy,or whosethymomais notresectable,or thosewho havepoorresponseto radiotherapy.

关键词： myasthenia gravis thymus tomography, X-ray computed

Intervention of CT Localization plus TCM Therapy on Prolapse of Lumbar Intervertebral Disc

在线全文

学校读者我要写书评

暂无评论

Journal of Acupuncture and Tuina Science 2003年第4期1卷 53-55页

作者： LUO Zhi-hong SHEN Wei-na Tuina Department of Ruijin Hospital Shanghai 200025 China

Purpose To observe the curative effect of interventional therapy by CT localization combined traditional Chinese medicine on prolapse of lumbar intervertebral disc. Method The inpatients of lumbar intervertebral disc prolapse were randomly divided into treatmentgroup and control group. Interventional therapy by CT localization combined TCM was used in the treatment group while in the control group TCM therapy was taken only. The treatment lasted for 10 days in both groups. Results The curative effect was 94.3% in the treatment group while 76.8% in the control one (P 0.05), which had statistical meaning. Conclusion Interventional therapy by CT localization combined TCM on prolapse of lumbar intervertebral disc had better effect and shorter treatment course.

关键词： tomography, X-Ray Computed Intervertebral Disk Displacement Lumbar Vertebrae Tuina Massage

A comparative study of ^(67)Ga planar and SPECT images in diagnosis of non-Hodgkin's lymphoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Medical Colleges of PLA(China) 1998年第1期13卷 26-28页

作者：汪静王连刚

To comparatively study the sensitivity and specificity of 67Ga planar and SPECT images in diagnosis of non-Hodgkin’s lymphoma. Methods Simultaneous 67Ga planar and SPECT were conducted by using Sopha DS7 SPECF for 48 intermediate lesions in 30 patients that had been pathologically confirmed, with their healthy counterparts as controls. Results Thesensitivity of planar images in head-neck, chest and abdomen was 60.0%, 72.7% and 72.7% respectively, and that of SPECTwas 93.3%, 90.9% and 81.8% respectively. The planar imaging had a general false-neck rate of 31.3%, 2.5 times higherthan SPECF imaging (12.5%) had. Both of them had the same false-positive rate (6.3%). Conclusion SPECT imaging is superior in sensitivity to planar imaging for head-neck, chest and abdomen in detection of intermediate NHL.

关键词： non-Hodgkin’s lymphoma gallium tomography, emission-computer, single-photon