density resolution

Study on the scanning parameters of the best density resolution for Helical CT and the clinical application

螺旋CT最佳图像密度分辨力时扫描参数的研究

Results Where the scanning parameters were changed , the image the quality and the density resolution changed regular .

结果改变扫描参数，图像质量及图像密度分辨力均有改变，并呈现一定规律的变化。

The smooth reconstruction results to increase density resolution .

平滑重建算法可以提高密度分辨率。

Areal density resolution in hard X-ray digital imaging system

分裂光束光度分析仪硬X光光电成像系统面密度分辨能力

The main disadvantage of this method is of decreasing density resolution and little no avail in the soft tissue .

其主要缺点为降低了密度分辨率，对软组织显示差。

Results The interference of scattered rays as eliminated by linear scanning imaging technique . The later had high detection sensitivity and density resolution .

结果线扫描成像技术克服了散射线造成的干扰，且探测灵敏度和精密度分辨率高。

Results : The qualities of clinical images were closely related to such parameters as CTDI , noise level , density resolution and spatial resolution .

结果：临床照片图像质量与剂量指数、噪声水平、密度分辨率和空间分辨率关系密切。

The density resolution of optimized imaging via equalization after stretch transforming , DWT and Butterworth high pass filter transforming was markedly improved .

经小波边界处理后软组织结构和骨结构的边界分辨率均有显著提高；

Results : where the kV was fixed , the image noise was decreasing with the increasing of mAs , white density resolution was increased , too .

结果：当kV不变时，随着mAs的增加，图像的噪声得到改善，密度分辨率也相应提高。

The performance testing results of the system showed that the spatial resolution of this kind of technique reached 3lp / mm and the density resolution reached 5 ‰ .

系统性能测试结果表明，基于FPD的2D-CT技术成像空间分辨率达3lp/mm，密度分辨率达5‰。

It can detect the conventional image quality parameters of CT equipment , including spatial resolution , density resolution , noise , layer thickness , CT value linear , uniformity and so on .

其可对CT设备的常规图像质量参数进行检测，包括空间分辨力，噪声，密度分辨率，层厚，CT值线性，均匀性等等。

X-ray phase contrast imaging always provides high density resolution when images weakly absorbing material , which shows wide prospect of application in many fields such as medicine , biology and material science .

X射线相位衬度成像对弱吸收物质有着独有的高密度分辨率，在医学、生物学、以及材料学上显示出良好的应用前景。

The traditional method in diagnosing fracture of nasal bone is plain film . It has inter-overlapping screenage and poor density resolution , which is easy to miss diagnose .

传统常规诊断鼻外伤鼻骨骨折的平片检查影像相互重叠、密度分辨力差，易出现漏诊，不能满足临床诊断的要求，并且也不利于鼻骨骨折的法医学鉴定。

Conclusion On the range of conventional FOV of CT , the spatial resolution and density resolution of CT images are the best when 25 cm × 25 cm FOV is used .

结论CT常用的扫描野范围内，当扫描野为25cm×25cm时，其图像的空间分辨率和密度分辨率最佳。

Mm FOV , smooth reconstruction . Conclusion scanning parameters on best density resolution use to scan livers , It increases the image quality and density resolution . It is very important in clinic .

在最佳图像密度分辨率时的扫描参数应用到临床肝脏扫描，能提高图像质量、提高密度分辨率，对临床具有十分重要的意义。

Objective To determine the optional scanning parameters used in helical CT scanning to obtain the best den ˉ sity resolution by analyzing the effect of different scanning parameters on the image quality and density resolution .

目的分析不同扫描参数对图像质量及密度分辨力的影响，研究螺旋CT在最佳密度分辨力时的扫描参数。

How improving the capability of ICT has become more and more an important task , for example , improving spatial resolution and density resolution , reducing scan time , enlarging the size of measure space , improving image quality , etc.

如何提高工业CT的性能指标，如怎样进一步提高空间分辨率、密度分辨率，减少扫描时间，增大可测工件尺寸，改善图像质量等等成为了CT界面临的重要任务。

With the industrial CT applications in the field of nondestructive testing of the constantly expanding , it is the performance of industrial CT put forward higher requirements , such as higher spatial resolution and density resolution , faster image generation time fault .

随着工业CT在无损检测领域应用的不断扩大，人们对工业CT的性能提出了更高的要求，如更高的空间分辨率和密度分辨率，更快的断层图像生成时间等。

The spacial resolution and the electron density resolution of the diffraction enhanced imaging ( DEI ) method are discussed relating to the experimental parameters . Appearances of refractive contrast in the DEI method are discussed and experimentally confirmed .

从X射线双晶衍射的原理出发，讨论了衍射增强成像（DEI）技术的空间分辨率和电子密度的衬度分辨率，明确了折射衬度在DEI技术中的表现形式，并从实验上进行了验证。

Improvement of CT Contrast ( Density ) Resolution By Dual Photons Absorption Method

双能光子吸收法提高CT衬度（密度）分辨率的研究

Method and Conclusion The principle and mechanism of the dual photons absorption method to improve the CT contrast ( density ) resolution were suggested and analyzed . The feasibility of this method in practical application was also discussed .

本文对应用双能量光子扫描吸收法以提高CT衬度（密度）分辨率的原理进行分析，并探讨其实际应用的可行性。

Finally , we calculated the information density matrix and resolution matrix in order to evaluate the inversion results .

最后计算了分辨矩阵和信息密度矩阵，以评价反演结果。

Objective : The resistivity tomography method has been widely applied in virtue of high density , high resolution and so on .

目的：电阻率影像法以其观测密度大、分辨率高等优点得到了广泛的应用。

He adds that pixel density and screen resolution have reached the point at which the eye doesn 't know which it is seeing .

他补充说，像素密度和屏幕分辨率已经发展到了让眼睛分辨不出电子读物和印刷文字之间差异的程度。

It estimates the base sampling density according to the resolution and terrain of the input signal to avoid missing signal .

根据输入数字信号的分辨率、地形起伏等预估基础采样密度，避免出现信号遗漏。

A simple method to determine the c ~ α atom coordinates of the protein structure from a set of electron density maps at medium resolution

一个从中等分辨率电子云密度图确定蛋白质主链C~α原子座标的方法

A simple method to quantitatively determine the the backbone structure of a protein from a set of electron density maps at medium resolution has been described .

本文叙述了一个简单的从中等分辨率电子云密度图确定蛋白质骨架结构的方法。

The distribution characteristic of the radar clutter is used to analyze the probability density and the power spectral density of the low resolution radar .

文中从雷达杂波的分布特性出发，分析了低分辨率雷达的地物杂波的幅度概率密度分布和功率谱分布特性。

First , the true size fabric simulation method with the different arrangements of yarn color and fine , warp and weft density and weave structure is analyzed , and matching scheme among yarn fine , fabric density and screen resolution is also designed .

对不同纱支色号、经纬密度、各种组织结构均配备好的织物外观进行了真实尺寸的仿真，探讨了纱线尺寸和织物密度与分辨率的匹配问题，实现了机织物的参数化仿真；