RPVI Exam Vascular Physics Case Review.pdf - VascularWeb

Doppler Insonification Angle = 30°
The angle formed between the flow direction and the steered Doppler line
is 30 degrees. Notice how the flow is traveling closer to the transducer,
but not directly toward as when the angle was 0 degrees. As a result, less
of the Doppler shift is detected at 30 degrees than at 0 degrees, but the
shift is still positive.