查询词典 Ct

Objective To study the effect of helical CT scanning dose and slice thickness on lung density, and to determine whether the lung density value measured by standard dose helical CT scan can be used for low dose helical CT scan.

目的 探讨螺旋CT扫描剂量、层厚是否对肺密度有影响，以决定常规剂量螺旋CT扫描测得的肺密度值能否适用于低剂量螺旋CT。

On the principle that the CT value is in inverse proportion to the log value of original copy number of target sequence, SURVIVIN CT/ GAPDH CT was used to evaluate the mRNA expression level in different tissues.

根据FQ-PCR以Ct值为标准，所得数值与实际表达量对数值呈反比的原理，以survivin mRNA Ct/GAPDH Ct的比值来评价不同组织survivin mRNA的表达。

Methods Retrospective analysis of 120 cases with multi-slice abdominal CT scanning were randomly and equally divided into experimental group and control groups, which group was 60 cases, respectively using automatic tube current modulation techniques and constant tube current in abdominal CT examination, the statistics were weighted CT dose index, dose-length product and effective milliampere seconds to compare image noise characteristics and the details show results.

回顾性分析我院腹部多层螺旋CT检查120例，随机分为实验组与对照组各60例，分别采用自动管电流调制技术和固定管电流技术进行腹部CT检查，分别统计CT剂量权重指数、剂量长度乘积及有效管电量，并对图像噪声特性、细节显示结果进行比较。

After dealing with the CT image of pedicle screw with interpolation numberical method, for pedicle screw of gradeⅠ,CT had a positive predictive value of 52.7%, a negative predictive value of 94%.,a sensitivity of 67% and a specificity of 94%; for pedicle screw of gradeⅡ, CT had a positive predictive value of 75%, a negative predictive value of 100%.,a sensitivity of 100% and a specificity of 94%.

结果：采用"低窗位、高窗宽"原则处理CT影像后，CT对于Ⅰ度椎弓根螺钉的敏感度为33%、特异度为87%、阳性预测值为32%、阴性预测值为88%。CT 对于Ⅱ度椎弓根螺钉的敏感度为100%、特异度为88％、阳性预测值为60%、阴性预测值为100%。Kapper值为0.603。

Results Metaphysis osteoporosis was observed on X-ray and CT in acute stage, the midsection of infarct of bone was isointensity on T1WI and iso/hyperintensity signal on T2WI, the edge of infarct of bone was ring-shaped hypointensity on T1WI and hyperintensity signal on T2WI. Small worm-eaten change and stippled calcification was observed on X-ray and CT in subacute stage, the infarct of bone was iso/hypointensity on T1WI and iso/hyperintensity signal on T2WI, the edge of infarct of bone was ring-shaped hypointensity on T1WI and hyperintensity signal on T2WI. Irregular and wriggle osteosclerosis was observed on X-ray and CT in chronic stage, was hypointensity on T1WI and T2WI.

结果 骨梗死急性期X线、CT表现为干骺端骨质疏松，MR T1WI骨梗死灶中央部分呈等至高信号，T2WI呈高信号，T1WI骨梗死灶边缘呈环形低信号，T2WI呈环形高信号；亚急性期X线、CT表现为小的虫噬样改变，伴有斑点状钙化，MR T1WI骨梗死灶呈等或低信号，T2WI呈等或稍高信号，T1WI骨梗死灶边缘呈环形低信号，T2WI呈环形高信号；慢性期X线、CT表现为不规则状、蜿蜒状骨质硬化，MR T1WI和T2WI均呈低信号。

Methods: Symptomless group consist of 100 adults without cervicobrachialgia history, male female equalization. Scan by CT, measuring cross section and CT value of scalene anterior muscle, as normal contrast; 32 final diagnosis cases in treat group, by means of same method, statistics and comparison, analysis. Adopt maneuver to therapy. Analysis was done after one course followed by short-term and long-term.

无症状组选取不同年龄组无颈臂痛病史者100人，男女各半；CT平扫其C6上缘-C7上缘，测量前斜角肌横断面面积及CT值，统计后作为正常值参照；治疗组取确诊的无并发骨性改变及椎管内病变的前斜角肌综合征患者32人，CT平扫其同一平面，测量其患侧前斜角肌横断面面积及CT值，进行对比分析；采用手法进行治疗；1疗程后按近、远期进行随访，分析疗效。

Results:1 CT demonstrated clear boundary and homogenous density in symptomless, near oval and symmetry. Normal cross section areas of scalene anterior muscle is 1.3793±0.0948cm2, normal CT value is 54.594±2.0106; 2 Cross section form of patient anterior scalene muscle is irregulation, adherence to tissue around, boundary not pure. Statistics display this area and CT value has obvious significant difference in symptomless group and patient group(P.01); 3 After one course, it shows 87.5%/100% of success rate and valid rate respectively in the short-term, as well as 71.8%/93.75% in the long-term.

结果：1 无症状者前斜角肌横断面形态双侧对称，成近椭圆形，轮廓清晰，与周围组织界限清楚，两侧横断面面积及CT值相近，C6上缘-C7上缘水平正常前斜角肌横断面面积为：1.3793±0.0948cm2 ，CT值为：54.594±2.0106；2 前斜角肌综合征患者患侧前斜角肌横断面形态不规则，与周围组织粘连，界限不清，统计显示患侧横断面面积较正常值增大，P＜0.01，差异非常显著，CT值较正常值增大，P＜0.01，差异非常显著；3 手法治疗1疗程后，随访显示近期优良率87.5%，有效率100%，远期优良率71.8%，有效率93.75%。

Results:1 CT demonstrated clear boundary and homogenous density in symptomless, near oval and symmetry. Normal cross section areas of scalene anterior muscle is 1.3793 0.0948cm2, normal CT value is 54.594 2.0106; 2 Cross section form of patient anterior scalene muscle is irregulation, adherence to tissue around, boundary not pure. Statistics display this area and CT value has obvioussignificant difference in symptomless group and patient group(P.01); 3 After one course, it shows 87.5%/100% of success rate and valid rate respectively in the short-term, as well as 71.8%/93.75% in the long-term.

结果：1无症状者前斜角肌横断面形态双侧对称，成近椭圆形，轮廓清晰，与周围组织界限清楚，两侧横断面面积及CT值相近，C_6上缘-C_7上缘水平正常前斜角肌横断面面积为：1.3793±0.0948cm~2，CT值为：54.594±2.0106；2前斜角肌综合征患者患侧前斜角肌横断面形态不规则，与周围组织粘连，界限不清，统计显示患侧横断面面积较正常值增大，P＜0.01，差异非常显著，CT值较正常值增大，P＜0.01，差异非常显著；3手法治疗1疗程后，随访显示近期优良率87.5％，有效率100％，远期优良率71.8％，有效率93.75％。

CT findings of GP included gas accumulation under the recess of xiphoid,gas accumulation in the area of lesser omentum,gas accumulation under the recess of peritoneal cavity,and seroperitoneum. Conclusion As a non-invasive examination means for abdomen,CT examination can discover whether there is dissociative gas or not and estimate the amount of gas in abdomen more rapidly and exactly.CT can also estimate the position of perforation elementarily.The recess under xiphoid is the first place where the dissociative gas assembles after gastrointestinal perforation.

材料与方法1 一般资料：1999年7月至2 0 0 4年1月我院经CT检查的胃肠穿孔的患者13例，其中男8例，女5例；年龄19～6 5岁，平均4 0 2岁。13例均行腹部CT平扫及站立位腹部X线平片检查，其中6例先行CT检查后行X线检查。8例既往有胃、十二指肠溃疡病史，2例有明显腹部外伤史。10例表现为突发上腹部疼痛、腹肌紧张，1例表现为明显右下腹部疼

Investigation and discussion is various the portrait equipment having the three-dimensional body imaging function applies to hitting the target clinically, many row CT are worth to the application that the bone and arthrotrauma fracture 3-D rebuild, helix CT valuation in cultivating operation in the tooth, helix CT 3

探讨多种具有三维立体成像功能的影像设备在临床中的应用，多排CT对骨与关节外伤性骨折三维重建的应用价值，螺旋CT在牙种植手术中的评价，螺旋CT三维重建在胫骨平台骨折中的应用，三维重建技术的实现可以准确地提供影像诊断和医疗决策。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。