Tissue Doppler Imaging
Tissue Doppler Imaging - Related Videos
08:05
Doppler Ultrasonography for Live Imaging and Quantification of Ovarian Vascular Function in Mice
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Cited by 1 •
2025
Changes in ovarian blood flow during the preovulatory period are essential for ovulation. Doppler ultrasonography has been used in humans and large animals to assess ovarian hemodynamics and perfusion. A protocol is presented for applying Doppler ultrasonography to evaluate ovarian hemodynamics during the preovulatory and periovulatory phases in mice.
04:57
Non-Invasive High-Frequency Ultrasound and Doppler Imaging of Rat Brain Hemodynamics
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2025
Source: Giustetto, P., et. al., Non-invasive Parenchymal, Vascular and Metabolic High-frequency Ultrasound and Photoacoustic Rat Deep Brain Imaging. J. Vis. Exp. (2015)In this video, we demonstrate the use of high-frequency ultrasound and photoacoustic imaging to study the vasculature and hemoglobin content in the rat brain. This method provides detailed insights into cerebral perfusion and blood oxygenation, enabling non-invasive analysis of brain vascular structures and oxygen distribution.
09:28
Using Laser Doppler Imaging and Monitoring to Analyze Spinal Cord Microcirculation in Rat
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Cited by 5 •
2018
Here we present a combination of laser Doppler perfusion imaging (LDPI) and laser Doppler perfusion monitoring (LDPM) to measure spinal cord local blood flows and oxygen saturation (SO2), as well as a standardized procedure for introducing spinal cord trauma on rat.
03:47
Functional Imaging of Cerebral Blood Flow Using Transcranial Doppler Ultrasound
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2025
Source: Hage, B. D. et. al., Functional Transcranial Doppler Ultrasound for Monitoring Cerebral Blood Flow. J. Vis. Exp. (2021) This video demonstrates the use of Doppler ultrasound as a functional imaging tool to measure cerebral blood flow velocity, or CBFV in real time. It highlights how frequency shifts in the middle cerebral artery during tasks like breath-holding reveal changes in CBFV, offering insights into brain activity and vascular dynamics.
05:57
Blood Flow Imaging with Ultrafast Doppler
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Cited by 10 •
2020
This protocol shows how to apply ultrafast ultrasound Doppler imaging to quantify blood flows. After a 1 s long acquisition, the experimenter has access to a movie of the full field of view with axial velocity values for each pixel every ≈0.3 ms (depending on the ultrasound time of flight).
FAQs
Color mapping preserves spatial information, showing how tissue velocity varies across the imaged myocardium, whereas spectral waveforms emphasize velocity changes over time. In TDI, comparing these representations during systole and diastole helps link a regional motion pattern to the phase of the cardiac cycle. This distinction supports more precise interpretation than a purely visual examination.
Annular e′ is particularly useful because it focuses on annular motion during diastole, when the ventricle relaxes. Interpreting this measurement alongside systolic tissue velocities helps characterize impaired relaxation and contraction. Together, these findings add quantitative evidence about ventricular function to the broader, noninvasive cardiovascular assessment.
Conventional ultrasound can show the form and movement of chambers and valves, but TDI adds measured myocardial velocity. That quantitative layer is important when regional motion or timing differences require closer assessment. Used together, structural and valvular appearance supplies context, while tissue-velocity data refines evaluation of ventricular performance.
Because velocities can be examined across myocardial regions and cardiac phases, TDI can reveal differences in regional wall motion and the timing of contraction. These measurements are relevant to mechanical dyssynchrony, in which parts of the heart move less coordinately. The information can therefore characterize ventricular performance beyond a single overall impression.
A practical reading sequence starts by reviewing color-coded myocardial motion, then examining spectral waveforms across systole and diastole, with annular e′ considered for relaxation. Clinicians can then compare regional motion and timing with the overall ventricular assessment. This organized approach connects individual measurements to contraction, relaxation, and possible dyssynchrony.
TDI contributes to evaluation when clinicians need quantitative information about ventricular systolic or diastolic performance, regional motion, or mechanical dyssynchrony. Its findings can support assessment of heart failure, ischemia, and cardiomyopathies. Repeated measurements may also help evaluate treatment response by providing motion data for comparison across assessments.