图像质量

上腹部CT血管造影三维图像质量影响因素研究

Relating Factors on Image Quality of Three-dimensional Upper Abdominal CT Angiography

CT图像质量和辐射剂量的影响因素研究

Study on the factors influencing the image quality and radiation dosage of CT

数字化医用X射线机图像质量评价方法比较研究

Comparative Study on Image Quality Evaluation Method of Medical Digital Radiography System

多层CT扫描层厚、重建参数的选择对容积重建图像质量的影响

The effects of slice thickness and reconstructive parameters on VR image quality in multi-slice CT

X射线检测中的图像质量的改善

The Improvement of the Image Quality in Radiography

目的：分析利用运行双C臂提高冠状动脉造影图像质量的具体措施。

Objective : To analyze specific measures of using B1 cor Plus to improve imaging quality of coronary artery DCM .

随着b值的增大，图像质量下降，且ADC值亦逐渐减低。

As the b value increases , image quality decreased , and the ADC value is gradually reduced .

一种低比特率JPEG编码图像质量改进算法

An Improved JPEG Algorithm at Low Bit Rate for Image Coding

然而由于X射线CT对人体有损伤并且降低计量导致图像质量下降，限制了CT的进一步发展和应用。

However , X-ray will cause great damage and the quality of image will be poor when reduce dose , which restrains its applications .

图像质量优于CT扫描机操作台的简易减影图像，P<0.05。

The image quality of axial CT subtraction angiography was better than the subtraction image by the CT scanner console ( P < 0.05 ) .

本项目采用意法半导体公司（ST）的CTV100解决方案，实现了对传统模拟电视信号的高效数字域处理，显著提高了电视画面的图像质量；

It can process the traditional analog signal efficiently on digital field , which can improve picture quality greatly .

结果表明：加速电压V、Z轴值、探针大小ProbeSize、放大倍数M的设定对图像质量有较大影响。

The conclusion was that different parameters such as accelerating voltage , Z-axis value , probe size and magnification , have strong influence on imaging quality .

结论CR作为一种全新的影像学成像技术，以其高清晰度的图像质量，有效地实现了X线平片的数字化。

Conclusion CR as a new radiology technique , it achieved to transform the traditional X-ray into digital information with high distinct picture quality .

目的探讨消化道出血DSA检查影响图像质量的因素。

Objective To discuss the factors which may influence the DSA image quality in the examination of gastrointestinal hemorrhage .

本文论述了鉴定CT图像质量的标准，阐述了提高CT图像质量的各技术环节，为CT图像质量控制提出了有效的方法。

This paper discusses the standard used for identifying the quality of CT image , and reports the method which can be used to improve the quality of CT image .

评价MIP后血管图像质量。

The quality of MIP image was evaluated .

结论：16排CT三维成像大幅提高了图像质量和病变检出能力，为胃癌的术前准确评价提供了可信依据。

Conclusion : 16 slice CT three-dimensional ( imaging ) obviously improves image quality and lesion detection ability , and provides reliable basis for more exact preoperational evaluation of gastric carcinoma .

PET选择的晶体不同，则会直接影响到图像质量，笔者就PET常用的四种晶体进行了性能比较，并分析了它们的优缺点。

Since different PET scintillation crystals make different image quality , the authors compare the properties of four kinds of common PET scintillation crystals and analyze their advantage and shortcoming .

仿真和临床PET数据实验表明，所提方法可以在满足临床应用的需求下，有效地改善PET重建图像质量。

Simulated and clinical PET data experiment results demonstrate that the proposed method has an effective quality improvement to the PET image under the condition of meeting the clinical needs .

目的：探讨Butterworth滤波器不同滤波参数对SPECT图像质量的影响。

Objective : To explore the impact of different filter parameters of Butterworth on the quality of SPECT image .

相比MPEG视频压缩标准，在同样的图像质量情况下，能大幅度地提高压缩比。

Compared with the MPEG video compression standard , in the same image quality , can greatly improve the compression ratio .

结论：使用双C臂DCM行冠状动脉造影能实现到位迅速、运行安全、体位角度准确的技术要求，缩短检查时间，提高冠状动脉造影的图像质量和安全性。

Conclusion : Using B1 Cor Plus double C-arm angiographic device ( DCM ), coronary angiography can be performed quickly , the image quality and safety can be improved .

目的：本文就颅脑CT检查中如何提高摆位技巧和摆位的准确率，提高CT图像质量，为诊断提供正确，直观，清晰或基本没有伪影，质量较高的CT片。

Purpose : In this article , We discussed how to improve the quality of the position of skull and its accurate rte , imaging quality , for to offer a distinctive high quality CT film .

作者通过对进口、国产5种性能各异的CT胶片，在多幅相机上采用不同亮度和对比度进行试验后，选择出合适的感光条件，使CT图像质量能达到诊断要求。

In this study , the authers proposed the optimal radiographic parameters for 5 brands of CT films both imported and local , by adjusting brightness and contrast of multiformat cam-era to yield good diagnostic images .

为明确采集模式、衰减校正方式及重建方法对正电子发射断层显像（PET）的病变检出能力和图像质量的影响，利用一桶状模型进行测试研究。

A phantom study was performed to investigate the influence of acquisition modes , attenuation correction methods and reconstruction methods on the lesion detectability and image quality of positron emission tomography .

结论：采用-5～-15°OML为扫描基线，可提高颅底脑干区CT扫描图像质量。

Conclusion Adopting - 5 ~ - 15 ° OML as the scan baseline can improve the image quality of brain stem .

目的评价管电流调制技术降低多层螺旋CT（MSCT）胸部扫描剂量的程度，以及对CT图像质量的影响。

Objective To evaluate the radiation dose saved by attenuation-based online tube current modulation applied to multislice CT ( MSCT ) of the chest , and impact on the quality of CT images .

目的：评价肺部不同扫描参数下的辐射剂量和图像质量，探讨低剂量扫描在CT引导下肺部穿刺活检中的应用价值。

Objective : To compare the radiation dose and the quality of images in different CT scan parameters of the thorax , and to evaluate the application of low-dose scanning in CT guided puncture biopsy of the lung .

算法上，重点对运动估计进行了改进及优化，在图像质量（PSNR）损失较小的情况下，大大降低了计算复杂度。

Is presented . Motion estimation algorithm is improved and optimized to reduce the computational complexity with limited loss of PSNR .

基于TM数据的模拟反射率图则囊括TM数据七个波段的信息，信息利用完整，图像质量得到了很大提高。

The simulated reflectance imagine based on TM data has all seven bands information of TM data , and the imagine quality has been improved obviously because of full information .