密度分辨率

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。

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 .

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。

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 .

由于CT对软组织密度分辨率高，又为横断显示，是诊断腰大肌疾病的理想工具。

Computed tomography is recommended as the diagnostic procedure for its high resolution .

与传统的CT相比，磁共振有以下优点：密度分辨率高、无放射线、对人体安全。

Compared with the traditional CT , the advantages of MRI are followed : high temporal and spatial resolution , non-invasive and no harmful radiation .

目的：探讨一种新的重建技术改善CT图像的空间和密度分辨率，从而提高CT的诊断率。

Purpose : To explore application of a new processing algorithm in chest and nasopharyngeal CT scans for improving the resolution and quality of CT images .

结论：CT的高密度分辨率和MRI的多轴位成像对脊柱结核有重要的诊断价值。

Conclusion : There is important diagnosis value for the spine tuberculosis making use of high density distinguish rate of CT and multi-axis imaging of MRI .

该模型为X射线成像系统空间分辨率和密度分辨率的初步设计和评定提供了理论依据，可作为X射线图像恢复算法中模糊函数的先验信息。

The model can be used to design or evaluate X-ray imaging system and can also be a pre-knowledge of blur function in X-ray image restoration .

实验证明本工作满足实际要求，系统能够达到比较高的密度分辨率和空间分辨率，CT重建软件设计是成功的。

The experiment showed that the CT construction realized by the paper has a high density and space distinguishable abilities . The designing for CT construction software is successful .

CT以其高密度分辨率，能测出人体各种器官区域并以图像显示的优点辅助医生进行病情诊断。

Doctors can know more about the patient 's situation with the aid of CT which has high definition , can detect many tissues of human and display them with the image mode .

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。

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

结果三维DSA和常规DSA在动脉瘤的检出率、显示瘤颈以及动脉瘤的空间结构上明显优于常规DSA，而常规DSA密度分辨率较高，并可以动态显示血管的血流情况；

Results 3-dimensional DSA was excellent than conventional DSA in the lump neck as well as spatial structure , but the conventional DSA density resolving power was higher .

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。

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.

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。

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 .

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‰。

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 ‰ .

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。

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 .

平滑重建算法可以提高密度分辨率。

The smooth reconstruction results to increase density resolution .

方法用随机带来的水模进行扫描，计算出空间分辨率和密度分辨率。

Methods Using the Picker phantom , measure the spatial resolution and contrast resolution .

其主要缺点为降低了密度分辨率，对软组织显示差。

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

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。

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

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。

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 .

双能光子吸收法提高CT衬度（密度）分辨率的研究

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

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。

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 .

增强密度纵向分辨率的交叉褶积处理技术

The Cross - Convolution Compensation Enhancing Vertical Resolution of Dual Detector Density Logs

在采样密度和分辨率都较好的区域，两种方法得到的结果大体一致，但有限频率层析成像方法比射线层析成像方法所揭示的速度结构异常更零碎。

In those regions with dense sample and good resolution , the results from these two methods are basically coincident , but the velocity anomalies revealed by FFT are fragmentary .

地层微电阻率扫描图像（FMI）采样密度和纵向分辨率很高，可以直观地显示井壁地层特征。

Formation microscanner images ( FMI ) can show directly subtle changes of sidewall formation and provide abundant formations information .

提高补偿密度曲线垂直分辨率的方法

Improving vertical resolution for compensated density curve

但是电子束光刻技术固有的邻近效应和场拼接误差对大面积、高密度、高分辨率的曝光结构的影响极其严重。

However , the inherent proximity effect and field stitching error have serious effect on exposed patterns with high-resolution and high-density .

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。

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

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。

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

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。

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 .