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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。

Methods: Forty five lesions in 42 patients, including 22 lesions of breast cancer and 23 benign breast lesions, were examined by multi-slice helical CT with plain scan and multiphase enhanced scan.

42例45个病灶，其中乳腺癌病灶22个，乳腺良性病变23个（乳腺炎9个，乳腺纤维瘤4个，乳腺增生性疾病10个），行多层螺旋CT扫描平扫，并于增强后60、120、180、300、480 s进行多期增强扫描。

Results: Among 53 positive cases , single nodus was found in 47 cases, with 21 in left lung and 26 in right lung. The diameter ranged from 0.5cm to 3.0cm. Rugged edge and vascular figure were clearer in helical than in routine scan. Double noduses were found in 2 cases and all proved to be benign later , with one as tuberculosis and the other as nonspecific infection. Multiple noduses of both lungs were found in 4, with 3 as carcinomatous metastasis and 1 as tuberculosis. Among 100 controls in whom no nodus was found in routine CT scan ,a nodus (0.5cm) was found in 92 cases to have health examination and 2 was found in 8 cases with cancer (6 with esophagus cancer and 2 with lung cancer ).

结果：阳性者53例中，单个结节47例（左肺21例右肺26例），结节直径（0.5cm-3.0cm），比常规扫描更能检出结节边缘凹凸不平及肿瘤供血血管。2个结节2例均为良性（一例手术病理证实为结核，1例抗炎治疗后吸收痊愈），双肺多发性结节4例（3例为转移瘤，一例为结核），常规扫描无阳性发现者100例做三维重建，其中92例作健康体检者检出一个结节（0.5cm）；8例有癌性病史患者（食道癌6例肺癌2例），检出两例有结节。

You have just displayed and adjusted the appearance of your scan data and have started to individualize your workflow to rebuild the scan data!

你刚才所显示的和调整的出现，您的扫描数据，并已开始向个体您的工作流程，重建扫描数据！

The interlaced scan of surveillance cameras is the main defect for degrading video quality. Thus deinterlacing is needed to convert interlaced video into progressive scan format for future processing.

监控摄像机的隔行扫描是造成视频降质的重要因素，因此需要在进一步处理前对其进行去隔行。

The display includes signal lines including scan lines and data lines intersecting the scan lines, both arranged along straight lines.

该显示器包括信号线，信号线包括扫描线和与扫描线相交叉的数据线，扫描线和数据线都沿直线延伸。

Internal cylindrical drum machanistic imagesetter scan records section of the main characteristics is that sencitivity is adsorbed on drums of intine, phototypesetting, drum does not rotate, but by scanning head side to side movement in turnused mediumso imaging, usually on the exposure from drum 360 degree of 270 degrees as a scan of the film to prevent blurry due to reflection.

边方滚筒扫描式激平照排机的扫描纪录局部的次要特不面是，感平质料被吸附在滚筒的边壁上，照排时，滚筒并不不停不静，而是靠扫描脚一背回旋扭不停，一背移不静在感平质料上曝平不败像，凡是只诳骗滚筒360量洋的270量息为感平胶片的扫描区，以避免不屈射引起的暧昧不隐象。

Its decompression architecture requires only a finite state machine and a cyclical scan register whose length is the same as that of the data block. Compared to the length of the cyclical scan register required in Golomb and FDR codes, which is equal to the length of the test vector, hardware cost in the proposed method is less than that in Golomb and FDR codes.

测试源划分技术是解决这一问题的主要方法，它是将ATE中的部分测试功能转移到被测试的芯片上，芯片之外主要建立一个经过变换的测试数据存储源，以减少测试数据的传输，同时在芯片上又不需要花费太多的硬件执行数据变换，实现测试模式的生成。

Results One case with infantile onset had macrocephaly. The CT scan and MRI showedprominent low-density white matter throughout the cerebral hemispheres. MRI showed prominent also increased T2 signal in the periventricular whitematter. Another patient had an onset at school-age. The CT scan demonstrated brain atrophy. Histological examination on brain biopsy revealed diffuse demyelination and fibrous gliosis.

结果1例婴儿期起病者头颅大，CT扫描示前额明显的广泛性脑白质密度减低特征，MRI示脑室旁白质T2高信号；另1例学龄期起病，CT扫描显示脑萎缩，脑活检光镜下发现脱髓鞘和胶质细胞增生，电镜下观察到大量Rosenthal纤维及不规则的颗粒状沉积物。

Results In 7 cases of odontoid process fracture, X-ray demonstrated 4 cases and CT demonstrated 5 cases, whereas the spiral CT reconstruction diagnosed 7 cases, which could display the displacement of fracture clearly. The X-ray and CT showed asymmetric space between left and right gaps of atlantoaxial joint in 6 cases, while spiral CT reconstruction showed normal and excluded the possibility of atlantoaxial dislocation. There was one case of lateral atlantoaxial joint dislocation, which was demonstrated by the spiral CT reconstruction clearly but not by the X-ray and CT scan. There were 3 cases of atlantoaxial congenital deformity (1 case of absence of both posterior arch of atlas and odontoid process and 2 cases of maldevelopment of the odontoid process), which were displayed clearly by spiral CT reconstruction, but misdiagnosed as odontoid process fracture and atlantoaxial subluxation by X-ray and CT scan.

结果 7例齿状突骨折中，X线显示4例，CT显示5例，CT重建确诊7例，且清楚显示骨折移位情况；6例X线、CT显示寰枢椎左右间隙不对称，通过CT重建排除寰枢关节半脱位；寰枢外侧关节脱位1例，CT重建可清楚显示，而X线片和CT平扫均未能显示；寰枢椎畸形3例，分别为齿状突、后弓缺如1例，齿状突发育不良2例，CT重建均能清楚显示，而X线、CT均误诊为齿状突骨折、寰枢椎半脱位。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。