(1)To prospectively evaluate the effect of heart rate, heart rate variability, and calcification dual-source computed tomography (CT) image quality and to prospectively assess diagnostic accuracy of dual-source CT for coronary artery stenosis. by using invasive coronary angiography as the reference standard. 前瞻性评价心率、心率变异性及钙化双源计算机断层扫描成像质量的影响及对冠状动脉狭窄的双源性冠状动脉狭窄诊断的准确性评价。以侵入性冠状动脉造影为参照标准。
(2)Chest radiography plays an essential role in the diagnosis of thoracic disease and is the most frequently performed radiologic examination in the United States. Since the discovery of X rays more than a century ago, advances in technology have yieled numerous improvements in thoracic imaging. Evolutionary progress in film-based imaging has led to the development of excellent screen-film systems specifically designed for chest radiography. 胸部X线摄影中起着至关重要的作用在胸部疾病的诊断，是最常用的影像学检查在美国。由于发现X射线的一个多世纪前，技术的进步得到了大量的改进，在胸部影像。电影为基础的成像的进化进展，导致了专门设计用于胸部放射摄影的优秀的屏幕膜系统的发展。 (3)although mammography is quite sensitive for the detection of breast cancer morphologic criteria that are mammographically visible are frequently insufficient for the differentiation of benign from malignant lesions.Performance of needle aspiration and needle localization procedures followed by excisional biopsy is frequently necessary to determine the origin of a mammographic finding. 虽然摄影是乳腺癌的形态学标准，乳房可见检测相当敏感，经常不足的恶性病变良性分化性能。穿刺针定位切除活检程序经常需要确定一个X线发现的起源 (4)Therefore,initiatives have been taken among radiation protection authorities to give priority to investigations of dose levels and frequencies of X-ray examinations among children. The main objective is to establish recommendation of upper dose limits for various diagnostic procedures and to implement minimum requirements for equipment standards. 因此，在辐射防护当局之间采取了主动行动，优先考虑儿童的剂量水平和频率的调查。主要目标是建立各种诊断程序的上限的建议，并实施设备标准的最低要求。 (5)Thus, the aim of our study was to prospectively evaluate to what extent image quality in 16-detector row CT coronary angiography is a function of the heart rate and image reconstruction technique. 因此，我们的研究的目的是前瞻性评估在何种程度上的图像质量在16检测器行冠状动脉造影是一个功能的心脏速率和图像重建技术。 (6)The aim of our study was to prospectively evaluate the effect of heart rate, heart rate variability, and calcification on dual-source CT image quality and to prospectively assess the diagnostic accuracy of dual-source CT for coronary artery stenosis , by using invasive coronary angiography as the reference standard. 本研究的目的是前瞻性评估心脏心率、心率变异性和钙化对双源的图像质量的影响，并前瞻性评估冠状动脉狭窄的双源断层扫描的诊断准确率，通过使用侵入性冠状动脉血管造影作为参考标准。 (7)The purpose of this study was to compare observer performance for the detection of urinary system calculi using computed radiographs with different display formats and different viewing systems. 本研究的目的是比较的观察员性能检测泌尿系统结石的CT片有不同的显示格式和不同观测系统。 (8)CT studies were performed with a dual-source scanner in all patients and were performed without complications.Prior to acquisition of the topogram, patients received a single dose of 2.5mg of idodine. . CT检查与所有患者双源扫描仪进行，无并发症。对像收购之前，患者接受单剂量2.5mg的碘。 (10)The degree of correlation between multi-detector row CT coronary angiography and invasive coronary angiography in grading of coronary atherosclerosis was investigated with Spearman correlation analysis. The symmetry of data distribution and any underestimation or overestimation with multi-detector row CT coronary angiography were checked with the Bowker test. 多排螺旋CT冠状动脉造影和冠状动脉造影冠状动脉评分之间的相关程度进行Spearman相关分析研究。数据分布和任何低估或高估与多排CT冠状动脉成像的对称性与对称性检查。 (11)The quality of the images obtained with the digital flat-panel detector system was rated significantly superior to the quality of those obtained with the conventional film-screen radiography system . 与数字的平板探测器系统获得的图像的质量被评为显着优于那些获得与传统的电影屏幕摄影系统的质量。 (12)In conclusion , our results indicate that in 16-row detector cardiac CT, image quality critically depends on the choice of a suited reconstruction interval and reconstruction technique. In patients with a high heart rate, the best image quality is observed in end systole and early diastole ; in patients with a lower heart rate, the best image quality is observed in middiastole. 总之，我们的研究结果表明，在16排探测器心脏断层，图像质量的关键取决于一个合适的重建间隔和重建技术的选择。在患者的高心率、图像质量最好的是在收缩末期和舒张早期观察；患者心率较低，图像质量最好的是观察舒张中期。 (9)Image reconstruction in all data sets was performed by using retrospective electrocardiographic gating, a technique that allowed continuous image reconstruction from volume data sets during any phase of the cardiac cycle
采用回顾性心电门控技术在所有数据集进行图像重建，技术，允许从体数据重建图像连续的心动周期的任何阶段
数字系统提供了一个宽广的动态范围，这尤其适用于胸部成像。数字胸部X线摄影的第一步是使用储存荧光板，它能够生成质量足以与传统屏-片系统向媲美的影像。然而为了达到相似的对比分辨率，需要较高的放射剂量。
Digital system provides.....contrast resolution
Digital systems provide a broad dynamic range, which is especially suitable for chest imaging. Digital chest radiography is the first step in the use of stored fluorescent panels, it can generate enough quality and traditional screen film system to match the image. However, in order to achieve similar contrast resolution, higher radiation dose is required.
在过去的几年里，空间分辨率和时间分辨率的提高致使高度狭窄、病变的诊断图像质量更好、准确性更高。因此，16层和64层CT具有改善高心率患者的图像质量和减少由于重度钙化引起的放射状伪影的潜力。 In the past....to heavy calcification
In the past few years, the improvement of the spatial and temporal resolution leads to a better image quality and higher accuracy in the diagnosis of the disease. Therefore, the 16 layer and the 64 layer CT have the potential to improve the image quality of the patients with high heart rate and to reduce the radial artifacts due to severe calcification.
数字乳腺X线摄影被认为是“在乳腺癌监控方面最具潜力”的技术。在数字乳腺X线摄影中，影像获取、存储、及显示是独立完成的，且使每步最优化。
Digital mammography is...the X-ray energy Digital mammography is considered to be the most promising technology in the field of breast cancer surveillance. In digital mammography, image acquisition, storage, and display are completed independently, and make every step of optimization.
采用心脏重建算法为16排CT（西门子）配备的标准心脏软件包进行图像重建。这种算法允许单扇区图像重建时心率低于72/min,双扇区重建时心率高于72/min。 在此心率范围之间，时间分辨率呈线性增加和减少。
The adaptive cardiac volume...72beats per minute. Between these heart...and decrease.
The cardiac reconstruction algorithm was used to reconstruct the image of 16 slice CT (SIEMENS) with standard heart software package. This algorithm allows a single sector image reconstruction when the heart rate is less than 72/min, the dual sector reconstruction of heart rate is higher than 72/min. In this heart rate range, the time resolution increases linearly and decreases.
我们的结论：这种新型大面积硅平板探测器的诊断性的诊断性能在临床胸部成像中等同于或优于传统屏-片系统，并可取代传统X线照相系统。
We conclude that.......radiographic system Our conclusion: the diagnostic performance of this new type of large area silicon flat panel detector is equivalent to or superior to the traditional screen film system in clinical chest imaging, and can replace the traditional X-ray radiography system.
(完整版)医学影像专业英语
