For the best angle-corrected velocity estimates, the cursor should be adjusted to:

For the best angle-corrected velocity estimates, aligning the cursor to be the same angle as the arterial walls is crucial. This alignment ensures that the Doppler angle is as close to 0 degrees as possible, which is ideal for accurate velocity measurement. When the Doppler sampling cursor is aligned with the flow of blood, it allows for more accurate calculations of the velocity by minimizing the cosine effect that can occur at larger angles.

Using the correct angle is essential because Doppler ultrasound captures the frequency shifts of sound waves caused by moving red blood cells. The angle at which the Doppler ultrasound measures the velocity affects the readings, and aligning the cursor with the arterial walls ensures that the flow direction and the Doppler beam are parallel, leading to the most reliable velocity estimates. This practice is fundamental in vascular technology for assessing blood flow and diagnosing vascular conditions.