目的本研究对150例疑诊冠心病患者双源ct冠脉图像进行回顾性分析，探讨图像质量的影响因素和改善措施。
Objective to investigate the influencing factors on image quality of dual source ct coronary angiography by retrospective analysis of the images of 150 patients with suspected coronary artery disease.
全部病例均采用螺旋CT动、门脉双期增强扫描。
Standard hepatic dual-phase contrast-enhanced CT scanning was performed for all patients.
将双旗山金矿矿化类型划分为石英脉型和蚀变岩型。
The mineralization type of Shaungqishan gold deposit has been divided into quartz vein and alteration type.
L 297芯片产生脉宽可调的脉冲相序信号，该信号作为双极性桥式功率驱动电路的输入信号，放大后驱动步进电机。
L297 chip generates pulse phase sequence signals of which the pulse width is adjustable. The signals are the input ones of dual bridge driving circuit and drive the stepper motor after amplification.
在考虑载流子的空间电荷效应、扩散效应和注入电流脉宽情况下，推导了双漂移崩越二极管的渡越角表达式。
Taking the effects of space charge and carrier diffusion as well as injected current pulse width into account, an analytic expression of a transit angle of 8 mm Si DDR IMPATT diode is derived.
组冠脉造影正常，双密达莫药物负荷试验阴性6例。
GC normal coronary artery and negative drug test in 6 cases.
重点介绍微球与双侧向、声波、伽马、3506脉码、微电极（3104）组合测井中各种信号的传输、采集方法，刻度管理。
It also focuses on the signal transmission, acquisition and calibration procedure of MSFL and DLL, AC, GR, 3506PCM, ML(3104) combination logging.
重点介绍微球与双侧向、声波、伽马、3506脉码、微电极（3104）组合测井中各种信号的传输、采集方法，刻度管理。
It also focuses on the signal transmission, acquisition and calibration procedure of MSFL and DLL, AC, GR, 3506PCM, ML(3104) combination logging.
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