查询词典 CTA

After acetylation of cellulose, the allomorph of CTA changed and the crystallinity decreased; however, amorphism is dominant in CDA obtained by hydrolysis from CTA and spinning resulted in the reduction of crystallinity in CDA.

纤维素乙酰化后形成CTA，其晶型发生变化，结晶度降低；而CTA水解后得到的CDA，无定形占明显优势，纺丝过程中的取向又会进一步降低CDA的结晶度。

The result difference of the accuracy that 16 helix CTA diagnoses to aneurism and DSA does not have statistical significance.

结果329例中的181例患者发现202个颅内动脉瘤。4个动脉瘤CTA漏诊，而DSA检查过程中7个动脉瘤未能清楚显示。16层螺旋CTA诊断所有动脉瘤的敏感性、特异性和准确性分别是98%、98%和98%。16层螺旋CTA对于动脉瘤诊断的准确性和DSA的结果差别没有统计学意义。

Material and Methods:From March,2008 to January,2009,250 patients(146 Males and 104 Females,ranged from 18 to 82 years old,mean age was 48 years old) enrolled in the First Affiliated Hospital of Kunming Medical College were performed dual energy scan(Group A,200 patients) and Neuro-DSA scan(Group B,50 patients) using DSCT.The patients were randomly divided into Group A and Group B.Regarding to the justification of scan protocol,100 patients in Group A were selected as sub-group to explore the scan protocol.The image quality Was analyzed both in four categories(4.0/60、4.5/60、4.0/70、4.5/70) of flow rate and total amount of contrast-enhanced material and in three categories(100—150HU、150—200HU、200-250HU) of CT value of left common carotid artery.The comparison of two scan approach was based on image quality,radiation does, postprocessing methods,time of scanning and subtraction and data storage amount.To validate the diagnostic capability of DE-CTA virtual unenhanced images,100 patients in Group A were undergoing head scan both in routine non-contrast program and DE-CTA virtual unenhanced program.Mean CT values,signal-to-noise ratio,image quality,sensitivity of lesion identification,and radiation does were applied to comparison.According to diagnostic results of dual energy of cerebral arterial angiography,62 patients out of 200 patients in Group A were confirmed with cerebral vessel lesions,the results were complied with DSA findings(the time between the two methods were within 1 week).

材料与方法收集2008年3月到2009年1月间在昆明医学院第一附属医院行DSCT CTA检查者250例(男性146例，女性104例，年龄范围18-82岁，平均48岁)，随机分为A、B两组，A组200例行双能量头颅CTA扫描；B组50例行Neuro-DSA扫描。A组前100例按对比剂不同流率和总量分为4组(4.0/60、4.5/60、4.0/70、4.5/70)对图像质量比较；按触发时左颈总动脉内平均CT位分3组(100—150HU、150—200HU、200-250HU)，比较图像质量的差异；对A、B两组血管图像质量、辐射剂量、后处理的方法、扫描和后处理时间及数据的容量进行比较分析；A组中前100例行常规与DE-CTA虚拟平扫的平均CT值、信号噪声比、图像质量、病灶显示情况、辐射剂量的比较分析；A组中行DSA检查62例(两种方法间隔时间均1周内)，比较两种检查方法诊断结果是否符合，并对其中24例动脉瘤行动脉瘤部位、数目、形态、瘤颈显示程度、瘤颈大小及瘤体长径和短径的比较研究。

Objective To discuss arteriovenous malformation imaging display of CT,MRI,CTA,MRA,DSA and its pathology.Methods To collection arteriovenous malformation45cases and confirmed by CT,MRI,CTA,MRA,DSA and pathology after surgical operation.Results In the CT,imaging display mass,honeycomb,nodosity,strip,patch and blotch forms.

目的 探讨脑内动静脉畸形CT、MRI、CTA、MRA、DSA等影像学诊断及其与病理学表现的相关性方法本文收集颅内动静脉畸形54例，其中脑动静脉畸形45例，脑膜动静脉畸形1例，硬脑膜动静脉畸形1例，硬脑膜动静脉瘘7例，并经过CT、MRI、CTA、MRA、DSA及手术明确诊断。

This research was composed of three parts:in the first part, we observed the effect of CTA on small intestine peristalsis;in the sencond part, we observed the effect of sweet stimulability and bitter stimulability on discharge of vagus efferent never after CTA;in the three part,effect of CTA on c-Fos expressions in the brain nerve nucleus was observed.

结果：1给予蔗糖刺激时，CTA组大鼠小肠推进率与对照组相比差异显著，小肠推进率降低；在CTA组大鼠中，给予糖刺激的大鼠小肠推进率明显低于给予水刺激的大鼠。2给予正常大鼠蔗糖刺激时，切断迷走神经的大鼠的小肠推进率明显低于假手术组的。3建立CTA后的大鼠，口腔内给予蔗糖刺激或奎宁刺激时，迷走神经传出放电在刺激后即刻、刺激后30min、刺激后60min都比正常组有所增加。

Besides, effect of sweet stimulability and bitter stimulability on vagus nerve maybe is identical after CTA established, zhe two stimulate may have no difference in coordinating taste information and gut information.3 FLI neurons of SON and DMV in the CTA rats had much more expressions than that in the control rats., but after vagotomy, expressions are lowwer.

建立CTA后，苦味刺激与甜味刺激在味觉信息与内脏信息的整合作用效果类似，两者对迷走神经的调节趋于一致。3 CTA大鼠在SON和DMV内FLI神经元的表达高于正常组大鼠，而切断迷走神经后，表达却低于正常组大鼠。

Furthermore, in the CTA rats, compared with water stimulability, FLI neurons of SON and DMV induced by sucrose stimulability had had much more expressions.6 When the same sucrose stimulability was given, FLI neurons expressions of SON, DMV and LH in the CTA rats were much lowwer than that in the control rats.Conclusions:1 CTA had an inhibitory effect on small intestine peristalsis, indicate taste preference has an effect on small intestine peristalsis, and inhibitory effect induced by CTA is corresponded with US, this effect may have relations with vagus efferent never and humoral regulation.2 In the electrophysiology experiment, discharges of vagus efferent never in the CTA rats are much more than that in the control rats, indicates taste and taste preference may regulate small intestine peristalsis via vagus nerve, and dicharge can continude 1 hour, indicate humoral regulation also exists in the regulation.

结论1建立味觉厌恶对小肠运动有抑制作用，提示味觉嗜好性对小肠运动有影响，而且味觉厌恶引起抑制作用是与条件刺激成对应关系的，味觉刺激引起的小肠蠕动的抑制作用可能与迷走神经传出神经及体液调节有关。2在电生理实验中，CTA大鼠迷走神经传出放电高于对照组的大鼠，提示味觉及味觉嗜好性可能是通过迷走神经对小肠运动进行调节的，放电至能持续60min，表明味觉及味觉对小肠运动的调节中还有体液调节的参与。

Methods forty patients with head/neck 16 slice CT angiograph were divided into two groups at random,each group has 20 cases, the plain scan and the CTP was performed before CTA to all 40 cases. Group A use CTP to obtain the peak time of contrasted artery as CTA delay time, and scan from head side to foot side. Group B use contrast media automatic bolus tracking to obtain delay time,scan from foot side to head side.two groups CTA images were collated.

使用16排螺旋CT对40例患者行头颈部CTA检查，随机分为两组，各20例，所有患者在CTA之前行脑CT平扫及脑CT灌注扫描，A组以CTP所显示的动脉峰值时间作为CTA的延迟时间，扫描方向为自头侧向足侧。B组使用造影剂浓度实时监控跟踪触发技术确定延迟时间，扫描方向自足侧向头侧扫描，两组CTA图像相对照。

In displaying arteriole, CTA showed lower accuracy than that of DSA, the sensitivity was 83%; in displaying vein, CTA results showed no difference with DSA and surgical finding.

CTA在显示细小供血动脉的清晰程度低于DSA，其判断脑AVM供血动脉的敏感度为83%。CTA对引流静脉的显示与DSA影像和手术所见一致。

Methods Compile 27 borderline cases with cerebral and carotid arterious stenosis, which undergoing cerebral and carotid CTA examination and DSA examination in one week. Compared with DSA, appreciate accuracy of 64-slice CTA in diagnosis of cerebral and carotid arterious stenosis.

搜集临床怀疑颅颈部动脉狭窄性病变患者27例，均行头颈血管CTA检查，并在一周内行DSA检查，将CTA与DSA结果对照，评价64层CTA诊断头颈部动脉狭窄的准确性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。