tube current

There was no difference of statistics in homogeneity of image under each tube current .

不同管电流采集到的图像均匀性无统计学差异。

High precision control of the tube current

高精度的管电流控制

And , decreasing tube current may be an effective means of reducing radiation dose .

可见降低管电流是一种减少辐射剂量的有效方法。

Application of Automatic Tube Current Modulation Techniques in the Abdomen Multi-slice CT Scanning

自动管电流调制技术在腹部多层螺旋CT扫描中的应用

Pulse Frequency Modulation is realized by microprocessor to control tube current , tube voltage .

采用微处理器调频控制管电流、管电压。

Magnetic field distribution of loosen oval-shaped spiral tube current

考虑螺距时椭圆截面螺线管电流磁场的空间分布

Fixed screw propeller shrouding Magnetic field distribution of loosen oval-shaped spiral tube current

定螺距螺旋桨导流管考虑螺距时椭圆截面螺线管电流磁场的空间分布

Automatic stabilizing adjustor for X-ray tube current

X线管电流自动稳定调节装置

Multi-slice spiral CT low dose scanning can be used for the chest when the tube current was reduced .

用降低管电流的方式可降低X射线剂量，即用多层面螺旋CT低剂量扫描胸部是可行的，但至20mA后肺尖有线性硬化伪影。

Research on this question has importance for completing foam tube current flow properties and enriching non-Newtonian fluid mechanics .

关于这个问题的研究，对完善泡沫管流流动特性的研究和充实非牛顿流体力学有着重要意义。

As for regular dose , parameters were the same with the low-dose group except for a tube current at 160 mA .

常规剂量法除管电流采用160mA外，其余条件同次低剂量法。

Objective To observe the changes of chest images in multi-slice spiral CT low dose scan with the method to reduce tube current or voltage .

目的探讨将通过降低管电流或管电压来降低多层面螺旋CT扫描的X射线剂量的方式用于胸部，观察其影像图像质量的变化。

The method evaluated one channel 's response nonuniformity by testing the characteristics of its photodiode and scintillator varying with tube current and voltage respectively .

该方法是通过测试组成通道的光电二极管和闪烁体分别随管电流和管电压的变化特性来评价该通道的响应不一致性的。

Methods CT chest scaning with three different tube current of 180 mA , 80 mA and 40 mA was accomplished to 150 children suspected airway lesions .

方法150例疑有气管病变的儿童，用3组不同的管电流（40、80、180mA）行螺旋CT胸部扫描。

The displaying accuracy of airway lesions by post processing images with tube current of 40 mA and 80 mA was 98.3 % and 100 % , respectively .

40和80mA扫描诊断的准确性分别为98·3%、100%。

Involved in abdominal aortic dissection : slice thickness 6 ~ 8 mm , reconstruction interval 2 ~ 3 mm , pitch 1.5 or 1.75 ; tube current 125 mA .

累及腹主动脉：层厚6～8mm，重建间隔2～3mm，螺距1.50或1.75，管电流150mA。

The protective measures are perfect , includes input voltage , tube current , filament current and overpower protection ; The diagnosis system can detect connection condition of the various parts , then display these status .

保护措施完善，具有过过管输入电压、过管电流、过灯丝电流、过功率保护；能自我诊断系统各部分的连接状态，并显示状态。

The use of main scan parameters : ( 1 ) the ascend aortic dissection : slice thickness 4 mm , reconstruction interval 2 mm , pitch 1.25 ; tube current 175 mA ;

其主要扫描参数的使用：（1）升主动脉夹层：层厚4mm，重建间隔2mm，螺距1.25，管电流175mA；

By investigating the direct current carrying characteristics of the rod current lead and the tube current lead , it is found that the current carrying efficiency of tube current lead is higher than the rod current lead .

通过研究棒状和管状电流引线的特性，发现了管状电流引线具有高输运效率的优点。

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。

X-ray machine mA circuits are generally composed by mA Pre-set circuits and mA detect circuits . To effectively control the tube current , there are many safety circuits and auxiliary circuits in mA control circuits .

X线机mA控制电路由mA予置电路和mA检测电路组成；

Some studies on the sound resonance mechanism of HPS , and one scheme is brought forward to avoiding sound resonance of higher power HPS , that is , using switch capacitance method to control the tube current .

研究了高压钠灯声共振的产生机理，也通过对消除高压钠灯声共振的诸多方法的分析和比较，提出了一种消除声共振的方法：用开关电容法来实现对灯电流的频率控制。

This essay offers the calculation of magnetic field along axis of finite long rectangle section spiral tube current , gives the resolution formula and illustration of the magnetic field , and draws some significant conclusions by discussing on the calculation .

计算了有限长矩形截面螺线管轴线上的磁场，给出了磁场的解析式和图示，并对计算结果作了讨论，得出了一些有意义的结论。

RESULTS : The entrance doses of the phantoms decreased square-inversely and tube current ( mAs ) used to get the images with the same ratio of signal to noise increased linearly with the increase in thickness of additional Al filtration .

结果：随着附加滤过板厚度的增加，体膜表面剂量呈平方关系下降；若获得同样的图像信噪比，则管电流（mAs）呈线性增加；

Conclusion High accuracy for the detection of nephrolithiasis and ureterolithiasis is obtained and the radiation dose is significantly decreased by using unenhanced 16-detector helical CT performed at a reduced tube current of 60 mAs for the patients less than 90 kg .

结论对于体重90kg的病人，在16层螺旋CT，管电流为60mAs的低剂量平扫诊断肾及输尿管结石能够获得高的准确率，并且明显降低病人的放射剂量。

If the horizontal well has very high output , the affect of borehole tube current are larger , the place of breakthrough will deviate to heel . ( 4 ) With horizontal well length increasing , displacement efficiency function will add ( not think about borehole tube current ) .

当水平井产量极高时，受水平井筒管流影响，见水部位将向水平井根端偏移。（4）不考虑井筒管流影响下，底水驱替效率伴随着水平井长度的增加而增加。

A New Discharge Tube Impulse Current Tester

一种新型放电管脉冲电流试验仪

As one tube 's current increases from the midpoint , or idle , bias current , the other tube 's current is decreasing by an equal amount .

作为一个管的电流增大的中点，或闲置，偏置电流，其他管目前正在减少的同等数额。

Method of calculation of flow discharge in scour tube with spiral current

螺旋流排沙管泄流量计算方法

Study on focusing characteristic of acceleration tube in high current implanter

强流离子注入机加速管的聚焦特性研究