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130篇 您的检索式:作者名="CANNELL M"
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1钆特醇及钆喷替酸葡甲胺在1.5、3.0 TMR下鼠脑胶质瘤模型增强扫描中的应用比较研究显示文摘目的 对比钆特醇及Gd-DTPA在1.5及3.0 T MR下的增强效果,比较两者在增强扫描中的应用价值.方法 42只CDF Fisher 344雄性大鼠,采用经皮导管脑内接种胶质瘤细胞,培育1周,制作鼠脑胶质瘤模型.将大鼠采用数字表法随机分为4组,分别为12、10、10、10只,进行1.5及3.0 T MR下注射钆特醇及Gd-DTPA增强效果对比、注射钆特醇在1.5及3.0 T两种场强下增强效果对比、1.5 T MR下使用标准剂量钆特醇与3.0 T下使用半剂量增强效果对比.两次扫描间隔24 h.选取注射对比剂前及注射后第1、3、5、7、9分钟时间点的T1加权图像,利用影像工作站分析计算各图像的信噪比(signal to noise ratio,SNR),对比噪声比(contrast to noise ratio,CNR)及对比增强比(contrast enhancement,CE),所得数据选用Student配对双尾t检验行统计学分析.结果 1.5 T MR下,注射Gd-DTPA后各时间点图像SNR、CNR和CE平均值分别为54.4±3.2、17.0±3.3、20.8±3.4;注射钆特醇后各值分别为53.2±3.2、17.2±3.1、20.8±3.2,两者差异无统计学意义(t值分别为2.247、0.403、0.076,P值均>0.05).3.0 T MR下,注射Gd-DTPA后各时间点图像SNR、CNR和CE平均值分别为94.8±7.1、38.0±6.0、45.0±6.3;注射钆特醇后各值分别为95.5±2.9、37.2±2.7、45.6±2.8,两者差异亦无统计学意义(t值分别为0.303、0.573、0.357,P值均>0.05).注射钆特醇在1.5 T MR下增强扫描后各时间点图像SNR、CNR和CE平均值分别为51.9±3.0、15.6±3.0、18.6±3.0;在3.0 T MR下图像各值分别为86.1±4.9、27.4±5.0、37.3±5.3,均高于1.5 T MRI图像,差异有统计学意义(t值分别为36.227、11.977、17.106,P值均<0.05).1.5 T MR下注射标准剂量钆特醇增强扫描后,各时间点图像SNR、CNR和CE平均值分别为53.8±1.6、17.7±1.7、20.3±1.6;3.0 T MR下注射半剂量钆特醇增强图像各值分别为72.2±2.4、15.4±2.4、21.1±2.4,两者SNR、CNR均值差异有统计学意义(t值分别为31.503、5.137,P值均<0.05),而两者CE均值差异无统计学意义(t=2.033,P>0.05).结论 利用鼠脑胶质瘤模型,在1.5及3.0 T MR下注射钆特醇和Gd-DTPA行增强扫描,两者增强效果无明显差异;3.0 T MR下注射钆特醇行增强扫描,效果明显优于在1.5 T条件下使用;3.0 T MR下使用半剂量钆特醇与在1.5 T下使用标准剂量增强效果相仿,同样能取得满意的增强效果.因此,使用钆特醇可在保证增强效果的同时,在一定程度上降低使用MRI对比剂的风险,增加安全性.艾飞 Val M Runge John N Morelli Lan.Vu Jeremy Cannel Alan T Loynachan 漆剑频 李小明 2010中华放射学杂志2010,44,11:2
2Physiological basis of wood production: a review 显示文摘Cannell M G R 1989Scandinavian Journal of Forest Research1989,4,:1
3Climatic warming,spring budburst andfrost damage on trees显示文摘CANNELL M G R SMITH R I 1986Journal of Applied Ecology1986,23,:1
4Bion- transformtion of alosteron: mechanism of hydan- toin formation显示文摘KNAGGS A R CABLE K M CANNELL R J P 1995Tetrahedron Letters1995,36,3:1
5Diagnosis and treatment of vitamin D deficiency显示文摘Cannell JJ Hollis BW Zasloff M 2008Expert Opin Pharmacother2008,9,1:1
6Shoot growth phenology, dry matter distribu- tion and root: shoot ratios of provenances of populus trichocarpa, picea sitchensis and pinus controla growing in scotland 显示文摘Cannell M Willett S 1976Silvae Genetica1976,25,2:1
7Allocation in trees:a review of concepts for modelling显示文摘CANNELL M DEWAR R 1994Advances in Ecological Research1994,25,:1
8The control of calcium release in heart muscle显示文摘Cannell M B Cheng H Lederer W J 1995Science1995,268,5213:1
9Query - based sampling of text databases显示文摘Callan J P Cannell M 2001ACM TOIS2001,19,2:1
10Screening for photosynthetic efficiency显示文摘Menz K M Moss D M Cannell R Q 1969Crop Sci1969,,9:1
11The consequences of CO2 stabilistation for the impacts of climate change 显示文摘Arnell N W Cannel M G R Hulme M 2002Climatic Change2002,53,:1
12Carbon sequestration and biomass energy offset: Theoretical, potential and achievable capacities globally, in Europe and the UK 显示文摘Cannell M 2003Biomass and Bioenergy2003,24,:1
13Carbon sequestration and biomass energy offset:theoretical,potential an d achievable capacities globally,in Europe and the UK显示文摘Cannell M G 2003Biomass and Bioenergy2003,24,:1
14Regulation of Myc by miR-34c: A mechanism to prevent genomic instability? 显示文摘Cannell IG Bushell M 2010Cell Cycle2010,9,14:1
15Partial inhibition of Ca2+ current by methoxyverapamil (D600) reveals spatial nonuniformities in i during excitationcontraction coupling in cardiac myocytes显示文摘Cheng H Cannell M B Lederer W J 1995Circ Res1995,76,2:1
16The Top Closure 3S Sys- tem, for skin stretching and a secure wound closure 显示文摘Topaz M Cannel NN Silberman A 2012Eur J Plast Surg2012,35,7:1
17Diagnosis and treatment of vitamin D deficiency显示文摘Cannell J J Hollis BW Zasloff M 2008Expert Opin Pharmacother2008,9,1:1
18Thermal time, chilling days and prediction of budburst in Picea sitchensis显示文摘Cannell M G Smith R 1 1983Journal of Applied Ecology1983,,20:1
19Yield of minirotation closely hardwoods in temperate region : review and appraisal显示文摘Cannel M G R Smith R L 1980Forest Science1980,26,:1
20The effect of oral creatine supplementation on the 1000-m performance of competitive rowers显示文摘Rossiter H B Cannell E R Jakeman P M 1996J Sports Sci1996,14,:1
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