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Ultrasonography

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...

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Related Experiment Video

Updated: May 6, 2026

Blood Flow Imaging with Ultrafast Doppler

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

Ultra-high frame rate tissue Doppler imaging.

Birger Brekke¹, Lars C L Nilsen, Joakim Lund

¹MI Lab and Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.

Ultrasound in Medicine & Biology

|November 12, 2013

Summary

A new ultra-high frame rate tissue Doppler imaging (UFR-TDI) method achieves 1200 frames/s, offering detailed insights into cardiac mechanics. This advanced technique accurately measures velocities and reveals precise timing of electromechanical events during systole.

Keywords:

Aortic valve closure Continuous acquisition Echocardiography Mechanical wave propagation Multi-line acquisition Myocardium function Plane wave imaging Pre-ejection period

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High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart

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Published on: July 9, 2010

Area of Science:

Cardiovascular Imaging
Echocardiography
Physiology

Background:

Conventional tissue Doppler imaging (TDI) has limitations in capturing rapid cardiac events.
High frame rates are crucial for detailed analysis of myocardial mechanics.

Purpose of the Study:

To introduce and evaluate a novel ultra-high frame rate tissue Doppler imaging (UFR-TDI) method.
To assess the feasibility and diagnostic potential of UFR-TDI in healthy volunteers.

Main Methods:

Developed UFR-TDI using two broad transmit beams focused on ventricular walls.
Achieved a frame rate of 1200 frames/s in a four-chamber apical view.
Evaluated the method in 10 healthy volunteers.

Main Results:

UFR-TDI demonstrated good agreement with conventional TDI for peak annular velocities and time to peak S' intervals.
The method successfully separated timing of electrical activation, mechanical contraction, mitral valve closure, and ejection start.
Earliest mechanical activation was observed before mitral valve closure.
Propagation speed of the mechanical wave from aortic valve closure was measurable.

Conclusions:

UFR-TDI is a feasible and valuable advancement in echocardiography.
This technique provides enhanced temporal resolution for studying cardiac electromechanical coupling.
UFR-TDI offers novel insights into systolic events beyond conventional TDI capabilities.