目的对多层螺旋CT图像伪影的成因及其影响因素进行分析。
Objective: to study the factors influencing multi-slice ct image artifacts.
对自制模体行ct扫描，分析CT图像伪影可能引起的图像误差。
The image error possibly from ct image artifact was analyzed after scanning a self made phantom by ct.
方法根据故障现象，将图像伪影分为规则伪影和不规则伪影两大类。
Methods Image artifact was classified two sorts such as regular artifact and irregular artifact by faults phenomenon.
本发明提供了一种降低平版印刷版油墨覆盖区上图像伪影的设备和方法。
An apparatus and method of reducing image artifacts on ink coverage areas of a lithographic printing plate are provided.
目的研究MRI图像和K -空间数据之间的映射关系以及因K -空间数据有问题而引起的典型的图像伪影。
Objective To research the mapping relationship between MR image and its K-space data as well as some typical artifacts caused by error K-space data.
了提高CT图像的清晰度，降低伪影对医生诊断的不利影响，文章提出了一种基于小波变换和软阈值法的CT图像伪影消除方法。
To improve the clarity of CT image, and reduce the disadvantageous affect of the artifact, the article proposes a method of reducing CT image artifact based on wavelet soft threshold.
双能CT也已被证明能够改进图像质量和减少伪影如射线硬化等在CT灌注成像方面的传统局限性（101）。
Dual-energy CT has also been shown to allow for improvements in image quality and reduction in artifacts such as beam hardening that have traditionally limited CT perfusion imaging(101).
SENSE重建算法通过计算重叠位置的线圈灵敏度系数，将多个线圈得到的有重叠伪影的图像进行展开，得到一幅全-FOV 的无重叠的图像。
SENSE reconstruction algorithms can unfold the superposed voxels and combine into a full FOV image by the calculation of the coil sensitivity with the body coil reference scan data.
在多层螺旋CT心脏及冠状动脉成像中，利用心电门控制技术在心脏运动最慢的时期采集图像数据，实线抑制心脏运动伪影的目的。
In multilayer spiral CT heart and coronary artery imaging, image data are acquired by ECG gating technology when heart beats slowest so as to restrain pulsation pseudo-image.
结论：选择最佳时相进行图像重建可以最大限度减轻心脏运动伪影，提高图像质量。
Conclusion: image reconstruction in the optimal phase can decrease the artifacts of cardiac motion as possible and improve the quality of images.
本文提出了一种适合于含有截断伪影磁共振图像的边缘检测新算法。
In this paper, we propose a new edge finding technology to fit to MR images with truncation artifact.
由于采集部分K空间数据成像是对连续频率MR信号的截断，导致经过傅立叶变换后的重建图像中出现截断伪影。
Sampling segmented K-space data makes a truncation of MR signal which is with continuous frequencies, leads to the truncation artifact in the reconstruction images after Fourier transform.
本文提出一种适合于含有截断伪影磁共振图像的边缘检测新算法。
We propose a new edge detection algorithm suited to MR images with truncation artifact.
基于MATLAB7.0编程对图像进行分析，计算伪影的面积占原像面积的比重。
The images were analyzed based on MATLAB7.0 programming to calculate the area proportion of the artifacts.
该研究小组指出，由于冠脉非常细小，又处于快速的运动之中，走行十分复杂，获得没有伪影的图像的确是一个挑战。
The small diameter and rapid movement of coronary arteries and their complex geometry make artifact-free scanning a challenge, they wrote.
方法随机抽取CR图像1000张，分析其中伪影的产生原因。
Methods1000pieces of CR image were selected randomly and the causes of artifact were analyzed.
结论选择回顾性心电门控最佳R R时相重建冠状动脉可以最大限度减轻心脏运动伪影，提高图像质量；
Conclusion The optimal R-R phase of retrospectively ECG-gated reconstruction images can decrease the artifacts of cardiac motion and improve the reconstructive image quality of coronary arteries.
以GE公司氙气探测器型CT为研究对象，讨论CT图像平常不常见伪影的图像表现，并给出一般的检修方法。
We take ge Corporation xenon detector ct as the research object, discuss the ct image performance of the rare artifacts and introduce the general maintain method.
由于心脏的变形和血液的流动，MRI图像中出现了弱边界、局部梯度极大值区域、伪影等现象。
Due to cardiac deformation and blood flowing, weak edges, local gradient maximum regions and artifacts are found in the MRI images.
为抑制计算机层析造影（CT）系统重建图像中出现的金属伪影，提高图像的质量，采用一种基于金属投影非线性权重衰减的方法进行校正。
A metal artifacts reduction method using nonlinear weights was developed to suppress metal artifacts in X-ray CT(computerized tomography) images to improve the image quality.
本文提出一种消除磁共振图像截断伪影的新方法。
A new method of truncation MR artifact reduction is proposed in this paper.
牙用固位钉、镍铬合金冠等材料在快速自旋回波图像上伪影减轻。
Artifacts produced by retention pin, nickel chromium crown and so on were less severe on fast spin-echo.
本文以GE公司氙气探测器型CT为研究对象，讨论了CT图像环状伪影的图像表现，并给出了一般的检修方法。
This paper discussed the ring-fabricate of CT images according as GE's xenon-detector type CT, and summarized general check method.
目的解决少数据投影图像重建中分辨率差、伪影严重等问题。
Objective To solve the problem of low resolution and more artifacts in image reconstruction from incomplete projections.
口服水对比剂及阳性对比剂均能满意地充盈胃腔（26/26），在轴位图像胃壁结构显示上单纯口服水对比剂效果好（25/26），且对周围图像无影响（伪影0/26）。
Both water and positive contrast media can be full of stomach(26/26). The showing of stomach wall is good in axial image(25/26), and no forgery to surrounding organs(0/26).
本文分析磁共振图像上几种特殊的装备伪影的表现及形成原因，探讨消除伪影的方法。
Analyzes the performances and causes of artifacts related to some special equipment on MR images and discusses the method of the troubleshooting for artifacts.
结论：对于依靠调节成像参数难以去除的弥散张量成像伪影，借助医学图像处理方法则能够有效的改善。
Conclusion: For those artifacts of DTI which cant been removed by adjusting sequence parameters, the method of medical image processing can be implemented.
这些伪影严重影响了图像的质量，给人们的判断带来极大困难。
These artifacts seriously influence image quality and bring huge difficulties for judgment.
这些伪影严重影响了图像的质量，给人们的判断带来极大困难。
These artifacts seriously influence image quality and bring huge difficulties for judgment.
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