Related Experiment Video
Updated: Jul 7, 2026

Blood Flow Imaging with Ultrafast Doppler
Published on: October 14, 2020
A nonuniform sampled coherent pulsed Doppler ultrasonic velocimeter with increased velocity range
G Eduardo1, C Nogueira, A Ferreira
1Inst. de Pesquisas Energeticas e Nucl., Sao Paulo, Brasil.
Abstract:
Coherent pulsed Doppler ultrasonic velocimeters cannot measure large blood velocities in deep vessels. To overcome this limitation, a nonuniform sampling method is proposed. The method is based on adding a delayed sampling sequence interlaced to the conventional one. The time interval between two consecutive samples can be continuously adjusted to avoid undesirable sample volumes. Experimental results are shown, confirming theoretical expectations that the maximum measurable velocity and the maximum measurable velocity width are doubled.
More Related Videos
Related Concept Videos
Assessing Blood pressure using a doppler ultrasound
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
Doppler Effect - II
Velocity and Acceleration of a Wave
The velocity of the particles can be obtained by taking the partial derivative of the position equation with respect to time. We can...
Doppler Effect - I
Velocity and Acceleration in Steady and Unsteady Flow
The acceleration can be generalized to any point in the flow, and expressed as components along three perpendicular directions, representing changes in velocity over time.
Ultrasonography
During an ultrasonography procedure, a handheld device called a...
