Final answer:
Blood vessels typically appear anechoic on B-mode ultrasound because they are filled with fluid that does not reflect ultrasound waves, resulting in a dark appearance on the screen.
Step-by-step explanation:
When using B-mode ultrasound to display blood vessels, the correct answer is that blood vessels will typically appear anechoic. This is because blood vessels are filled with fluid (blood) and fluids do not reflect ultrasound waves well, appearing black or dark on the ultrasound screen.
The term anechoic refers to the absence of echoes, indicating that the structure allows the ultrasound waves to pass through without bouncing back to the probe. Therefore, anechoic structures, like blood vessels filled with fluid, appear dark compared to surrounding tissues.Blood vessels typically appear anechoic on B-mode ultrasound because they are filled with fluid that does not reflect ultrasound waves, resulting in a dark appearance on the screen.