扫描

A new method of disease area mensuration and the percentage of diseases area of tea leaves with computer has been established by using Photoshop software to scan many leaves at the same time, and the further investigation also has been fulfilled. The results showed that when scanned with resolution 150 dpi,there were be short time to scanning and less disk space beenoccupied, and the effect as same as scanned with high -resolution. The results of disease area mensuration and percentage of diseases area of tea leaves using the new method also as same as the results using artificial mensuration, and the efficiency of the new method is much higher than the efficiency of artificial method.

摘 要：建立了通过对茶树叶片进行扫描，利用Photoshop软件同时获得多张叶片及其受害部位的像素值，从而快速计算茶树叶片受害面积以及受害面积百分率的测定方法，并对此方法进行了系统的研究，结果表明：扫描分辨率为150dpi时，扫描时间和存储占用空间较优，测定效果和高分辨率扫描效果基本一致，该方法测定结果与人工测定结果无显著差异，其效率远远高于人工测定。

This text researchs the laser scanning control system and software. The system adopts the way of light machine scan. It is mainly made up of the laser scanning control system, machine scanning system and lasers blast-off machine.

本文针对激光扫描控制系统与软件进行了研究，系统采用光机扫描方式，主要由激光扫描控制系统、机械扫描系统及激光发射器组成。

In this paper,the scanning strategy of Internet worm In hybrid（IPv4/IPv6） network environment which existing a large number of NAT are first analyzed.A new type of worm,TeredoWorm based on Teredo service is built.This worm applies two different layers scanning strategy.It means that the worm apply subnet scanning strategy in local subnet and apply scanning strategy based on Teredo service in inter-subnet.

首先在存在大量NAT的混合型（IPv4/IPv6）网络环境中分析了网络蠕虫的扫描策略，构建了一种新型的基于 Teredo服务的网络蠕虫—TeredoWorm，该蠕虫应用分层扫描策略为在本地应用子网内扫描策略；在子网间应用基于Teredo服务的扫描策略。

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。

Collecting a total of 102 cases(107eyes) of pations with traumatic optic neuropathy that underwent edoscopic optic nerve decompression surgery during December 1999 - April 2008 line,retrospective analysis of CT performance for the optic canal and paranasal sinuses,and Comparison of them with surgical results.102 cases of patients performed routine and coronal axial sinus CT scans,the optic canal zone wi th thin target scan,line of nasal tip and the anterior clinoid process connection as baseline for axis scan,and the vertical line of "bed nasal line" as baseline for coronal scan.

方法收集1999年12月-2008年4月间在青医附院耳鼻喉科行鼻内镜下视神经减压手术的外伤性视神经病患者的病例，共102例(107眼)，回顾分析其鼻窦及视神经管CT表现，并查看手术记录描述，将CT结果与术中所见情况进行对比分析。102例患者术前常规行轴位及冠状位鼻窦CT扫描，视神经管区行薄层靶扫描，以骨性鼻尖与前床突的连线为轴位扫描基线，以&床鼻线&的垂直线为冠状位扫描基线。

Laser scanning is the basis of SL process, and is an important factor in improving the parts'accuracy and productivity, three main problems such as the calibration of scanning system, the control of corner-contouring error and the generation of the scanning path exiting in the high-speed galvanometric scanning system are analyzed.

激光扫描是SL工艺的基础，同时又是提高成型精度、提高效率的重要环节，因而对振镜高速矢量扫描系统中存在的三个关键问题即扫描系统的标定、拐角轮廓误差的控制和填充扫描路径的生成进行了深入的研究。

Craniocaudal view and mediolateral oblique were conducted for each patient.If necessary,mediolateral view or spot view was operated. All cases take plain scanner and contrast-enchanced scanner with use of a helical CT (Somatom AR.SP).For a patient,a field view was chosen that field depict the whole breast,as well as the ipsilateral axillary and internal mammary chains.

SP螺旋CT机进行平扫和增强扫描，扫描范围从腋窝顶部至乳房下界。23例全部采用增强扫描，分别在注射造影剂100ml后30s、60s、90s时进行动脉相、静脉相、延迟相CT扫描，病人采用俯卧位，上胸及腹部垫高，使乳房自然下垂，双臂交叉放在头上。

Spondylolysis were showed in sagittal images. Conclusion: The scan range were increased for the fourth lumbar to first sacroiliac interverteral disc and contained vertebral arch for conventional intervertebral disc. The spiral scanning were performed for lumbar spondyloschisis and with MPR along the direction of vertebral arch. The method is simple and useful for the patients suffered low-back pain.

对常规椎间盘扫描采用对L(下标 4~5)及L5~S1，椎间盘加大扫描范围，包括椎弓根层面的方法，对于轴位扫描发现或可疑峡部裂的患者再做相应椎体螺旋扫描，行平行于峡部的椎弓长轴多平面斜矢状面和矢状面重建，是腰腿痛病人CT检查的简单、实用的有效方法。

Methods Sixty-five patients with suspected nephrolithiasis and ureterolithiasis were collected. Followed by standard-dose helical CT scans with 2-mm-thick section, 120kv, 160mAs, low-dose scan was carried out with the tube current reduced to 60mAs. All other technical parameters and anatomic coverage remained constant.

收集65例临床拟诊肾及输尿管结石病例，每一病例在常规标准剂量(120KV， 160mAs)扫描后再行低剂量扫描，在低剂量扫描中，管电流下降到60mAs，其余参数及扫描范围均保持不变。

Methods One hundred patients (80 males and 20 females, aged from 11 to 75 years) who suffered from cerebrovascular disease received routine cerebral CT examination in resting state firstly. After breathing in the xenon-oxygen mixed gase in proportion, they once more received the cerebral CT examination. Nine of them were injected vasodilating agent, then received the enhanced CT examination again. Finally, these results were transferred to the Xe-CT CBF analysis system to analyze the CBF quantitatively.

选择100例脑血管病患者（男80例，女20例，年龄11～75岁）在安静状态下进行CT头颅常规扫描然后吸入氙气与氧气按一定的比例形成的混合气体后再次进行扫描，其中9例注入血管扩张药后进而行增强扫描，最后将扫描结果上传Xe-CT CBF分析系统，进行CBF的定量分析。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。