17、当血流速度增快，流量加大时，彩超图像上血流信号的特点是：（） When both the velocity of blood flow and the flow rate increase, the characteristic of blood flow signals on color Doppler ultrasound images is:（）A．亮度提高 Brightness increaseB．亮度降低 Brightness decreaseC．亮度不变 Brightness unchangedD．都不对 All are wrong
17、当血流速度增快，流量加大时，彩超图像上血流信号的特点是：（） When both the velocity of blood flow and the flow rate increase, the characteristic of blood flow signals on color Doppler ultrasound images is:（）
A．亮度提高 Brightness increase
B．亮度降低 Brightness decrease
C．亮度不变 Brightness unchanged
D．都不对 All are wrong
参考答案和解析
亮度提高 Brightness increase
相关考题：
下列描述错误的是：A、PRF是Pulsed Repetition Frequency的缩写，也就是脉冲重复频率B、1/2PRF称为奈奎斯特频率极限（Nyqusitfrequencylimit），如果血流速度过高，使多普勒频移超过1/2PRF，则会出现频率失真（混叠）C、CDFI（Color Doppler Flow Imaging），即彩色多普勒血流图，可以显示血流的方向D、CDE（Color Doppler Energy）即彩色多普勒能量图，又称为CPA（Color Power Angiography），可检测低流量、低流速血流E、CDE显示血流时也有混叠现象
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