内容提示: 腹部影像学 Abdominal Imaging 中国医学影像学杂志 Chinese Journal of Medical Imaging· 122 ·【摘要】目的 探讨 100 kVp 上腹部双期增强 CT 扫描对胰腺强化程度、辐射剂量的影响,并评价其图像质量。资料与方法 回顾性分析行上腹部 CT 增强扫描患者60 例,根据管电压不同分为 100 kVp 组和 120 kVp...
Comparison of Coronary Computed Tomography Angiography Image Quality With High-concentration and Low-concentration Contrast Agents The Randomized CONCENTRA... Purpose:To confirm that the image quality of coronary computed tomography (CT) angiography with a low tube voltage (80 to 100 kVp), iterative re...
CT number stability and the implementation of adaptive radiotherapy were dosimetrically evaluated by performing the dose recalculation on kVCT. Compared to MVCT, kVCT significantly reduced DLP (except the highest kVp protocol), image acquisition and registration time. KVCT obtained higher scores than ...
group,thedifferencewassignificant.Conclusion:WhenusingenergyspectrumCTto performlow-dosechestCTscanonpatients,theapplicationoflow-kVtechnologycan obtainrelativelysatisfactoryimagequalityandlowerradiationdose. Keywordslowdose;noiseindex;SNR(SignaltoNoiseRatio);imagequality ...
Image qualit y and r adi at ion exposure at pulmonary CT angiography wit h 100 or 120 kVp prot ocol : pros pect ive randomized st udy. Radiol ogy, 2007, 245( 2) : 577 583. [ 3] 周旭辉, 彭振鹏, 郑丽丽, 等. 64 层螺旋CT 肺动脉成像低管电压设 置结合个体化对比剂应用的对照研究....
2. 70 kVp管电压和30mL对比剂的前瞻性心电门控触发大螺距CT冠状动脉成像 [J] . 祁丽 ,张龙江 ,周长圣 . 放射学实践 . 2014,第006期 3. 双源CT前瞻性心电门控技术在婴幼儿先天性心脏病的成像研究 [J] . 陈伟 ,吕飙 ,杜靖 . 医学影像学杂志 . 2014,第001期 4. 低管电压对256层C...
The model characterizes spatial variations of the fluence and spectrum independently. The spectrum is derived by matching measured values of the half value layer (HVL) and nominal peak potential (kVp) to computationally-derived spectra while the fluence is derived from in-air relative dose ...
This was less than the observed difference (more than 15%, especially at low air kerma) in the dose response curves when different energies (100 and 120 kVp) and same filter were used. Surface dose ranged between 0.02 cGy and 4.99 cGy. The lowest average surface dose (0.05 cGy) was ...
First round included only 74 keV VMIs resembling conventional 120 kVp images, and the second round included a supplementary iodine density map. Readers were asked to register presence of ABI as well as their confidence in their diagnosis based on a 5-point Likert scale. Sensitivity, specificity,...
分类号.I R445.3 密级.I 单位代码.I 10422 学号.1 2010120076 ⑧厶菇办霉 博士学位论文 (专业学位) 论文题目:FLASH双源CT双能量扫描在肾脏肿瘤低 kV扫描技术中的应用研究 Study of dua I-_’energy scan With FLASH Dua I・ _。Sou rce Computed Tomogr aphy inthe Low。_’k iIOVO Irage kidney tumor...