扫描长度

The raw data was processed by using axial, coronal and double oblique multi-planar reformation; Images obtained were graded in terms of quality with a 5-point scale(5=excellent, 4=good, 3=fair, 2=poor, and 1=nondiagnostic). In grading image quality at axial MPR, The radiologic specialists focused on the subarcuate fossa, tendon of tensor tympani, facial recess, vestibular aqueduct and pyramidal eminence, In grading image quality at coronal MPR, attention was given to the scute, crista transversa, fenestra cochleae, lateral malleal ligament and snake eyes signature of cranial nerve, In the grading of the image quality at double oblique MPR, the radiologic specialists concentrated on the malleus, incus, stirrup bone, upper bony semicircular and aquaeductus fallopii, and then to implement statistical analysis. In order to choose the minimum tube current values and the maximum pitch that can satisfy the diagnosis request, image quality of axial, coronal and double oblique reformation images was compared with different tube current groups. 15 ears of volunteers were used to test the validity with the scanning parameter. Subsequently noise, MTF and dose length product were measured by phantoms in different tube current and pitch, the parameters obtained were compared and taken into statistics analysis.

扫描模式使用临床常用的颞骨螺旋扫描方式：管电压120 kV，准直宽度20×0.6 mm，视野200 mm，重建矩阵512×512，旋转时间1 s/r，重建层厚0.6 mm，重建间隔0.3 mm，分别改变管电流(380、300、200、160、120和80 mA)和螺距(0.8、1.0和1.2)进行扫描和重建，然后对颞骨进行横断面、冠状面和双斜面多平面重组，于重组后的横断层面图像上选取弓形下窝、鼓膜张肌腱、面神经隐窝、前庭导水管和锥隆起5个解剖结构，冠状面重组图像上选取盾板、横嵴、蜗窗、面神经的蛇眼征和锤骨外侧韧带5个解剖结构，双斜面重组图像上选取锤骨、砧骨、镫骨、上骨半规管和面神经管5个解剖结构，在双盲的情况下由放射学专家分别对各管电流和螺距下扫描的重组图像进行评分，随后进行统计学处理，从中筛选出满足诊断要求的最低管电流值和最大的螺距，分别采用患者25例(15耳)用该管电流值和螺距验证其可行性；然后利用模体分别测试各管电流和螺距下的图像的空间分辨率、噪声及其剂量长度积，并对测试所得参数数值进行比较和统计学处理。

In IEEE Std 1149.1, the boundary-scan description language depicts the length and structure of the boundary-scan register, the instruction binary codes and the device-identification code etc.

在IEEE 1149.1标准中，边缘扫描描述语言描述了边缘扫描寄存器的长度和结构、指令的二进制代码及器件标志代码等。

Analysis showed that the effective scan field of view can be improved more than 90% comparing with that of the generation III with the invariability of the position...

分析表明，在射线有效扇束角和探测器长度、位置不变的情况下，它的有效扫描视野在三代扫描的1.9倍以上。

In the instrument of lignum automatic measurement,the length of lignum was measured by CCD.The design of the time sequence driving circuit of CCD was a critical problem of its application.

木材自动测量仪是用来自动扫描工厂加工的木材长度，并将其图像和数据保存在计算机中，便于调用木材时查询。

Intracellular free calcium ions level of smooth muscle cell was controlled by the technique of calcium claw cell length was measured by computerized image micrometry.

用图像分析系统测量平滑肌细胞长度。采用激光扫描共聚焦显微镜和免疫荧光技术分析rhoa在细胞内的时空分布变化。

METHODS:Smooth muscle cells were isolated from the circular muscle layers of Wistar rat colon and cell length was measured by computerized image micrometry.

酶解法分离结肠环行平滑肌细胞，分别采用图像分析系统和激光扫描共聚焦显微镜观测细胞长度和[Ca~(2+)]i 的变化。

As to the problem of short work time, it is proposed to enable sleep mode, minimize the length of scan windows, optimize the length of scan intervals and disable all host interfaces, which can lower current consumption of voice terminals.

针对语音终端待机时间短的问题，采用休眠模式、减小扫描窗长度、增大扫描间隔、关闭主机接口等措施，降低了功耗。

Independent factors associated with radiation dose were patient weight (relative effect on DLP, 5%; 95% confidence interval , 4%-6%), absence of stable sinus rhythm (10%; 95% CI, 2%-19%), scan length (5%; 95% CI, 4%-6%), electrocardiographically controlled tube current modulation (–25%; 95% CI,–23% to –28%; applied in 73% of patients), 100-kV tube voltage (–46%; 95% CI,–42% to –51%; applied in 5% of patients), sequential scanning (–78%; 95% CI,–77% to –79%; applied in 6% of patients), experience in cardiac CT (–1%; 95% CI,–1% to 0%), number of CCTA s per month (0%; 95% CI, 0%-1%), and type of 64-slice CT system (for highest vs lowest dose system, 97%; 95% CI, 88%-106%).

与放射剂量有关的独立因子有：病人的体重（对DLP的相对影响，占5%）；稳定窦性节律的阙如（占10%的影响）；扫描的长度（扫描长度增加1厘米相当于DLP增加5%）；应用心电图控制的管电流调制（导致DLP降低25%；用于73%的患者身上）；100-kV 管电压（使DLP降低46%，应用于5%的患者）；序贯扫描（降低78%；应用于6%的病人）；对心脏CT的经验（降低1%）；每月CCTA的数量；64层CT系统的类型

ObjectiveThe objective of this study is to provide the basis for the clinical diagnosis of whether the dorsal radiocarpal ligament is injury and treatment by knowing its normal patterns in the MRI. The primary approaches are anatomizing the dorsal radiocarpal ligament, studying the best scan sequence, angle, scanning level of MRI, and measuring its length, width and thickness.

目的本实验通过对桡腕背侧韧带的解剖，研究桡腕背侧韧带MRI成像的最佳扫描序列、角度及扫描层面，并丈量其长度、宽度及厚度，了解其在MRI影像中的正常形态，为临床诊断桡腕背侧韧带有无损伤其及治疗提供依据。

Methods 42 cases mature neonate with MSCT scanning in lung were collected and randomly divided into three groups averagely. The tube current was 50 mAs and 30 mAs for low dose scanning and 200 mAs for routine dose. The CT value of region of interesting and standard deviation were measured in the aorta that region of carina of trachea. And compared the noise, image quality, CT dose index and dose length product between two low-dose scannings and routine dose.

42例足月新生儿随机等分成3组分别行低剂量30mAs、50mAs及常规剂量200m AsMSCT胸部扫描，统一于气管分叉处测量并记录主动脉CT值及标准差，比较两低剂量扫描与常规剂量扫描的噪声、图像质量、CT剂量指数和剂量长度乘积等差别。

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。