Question

Which operator setting will increase the patient's exposure during a carotid duplex exam?

1) Increasing the Doppler angle
2) Increasing the pulse repetition frequency (PRF)
3) A higher baseline location
4) Increasing the Doppler gain

Answer 1

To increase the patient's exposure during a carotid duplex exam, you would need to increase the Doppler angle. Other options provided do not increase exposure but may affect other aspects of the exam.

Step-by-step explanation:

To increase the patient's exposure during a carotid duplex exam, you would need to make adjustments to the Doppler settings. The correct answer option would be 1) Increasing the Doppler angle. When the Doppler angle is increased, more of the sound beam is parallel to the direction of blood flow, resulting in a stronger Doppler signal and increased exposure.

Increasing the pulse repetition frequency (PRF) does not directly increase the patient's exposure, but it affects the ability to accurately measure high velocities. A higher baseline location and increasing the Doppler gain also do not increase exposure, but they can affect the quality of the Doppler signal.