Imperial College London
Alternate

DrMassoudZolgharni

Faculty of Medicine, National Heart & Lung Institute

Visiting Professor
 
 
 
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Contact

 

m.zolgharni Website

 
 
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Location

 

ICTEM buildingHammersmith Campus

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Summary

 

Publications

Citation

BibTex format

@article{Negoita:2016:10.1016/j.ijcard.2016.05.047,
author = {Negoita, M and Zolgharni, M and Dadkho, E and Pernigo, M and Mielewczik, M and Cole, GD and Dhutia, NM and Francis, DP},
doi = {10.1016/j.ijcard.2016.05.047},
journal = {International Journal of Cardiology},
pages = {31--36},
title = {Frame rate required for speckle tracking echocardiography: A quantitative clinical study with open-source, vendor-independent software},
url = {http://dx.doi.org/10.1016/j.ijcard.2016.05.047},
volume = {218},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - ObjectivesTo determine the optimal frame rate at which reliable heart walls velocities can be assessed by speckle tracking.BackgroundAssessing left ventricular function with speckle tracking is useful in patient diagnosis but requires a temporal resolution that can follow myocardial motion. In this study we investigated the effect of different frame rates on the accuracy of speckle tracking results, highlighting the temporal resolution where reliable results can be obtained.Material and methods27 patients were scanned at two different frame rates at their resting heart rate. From all acquired loops, lower temporal resolution image sequences were generated by dropping frames, decreasing the frame rate by up to 10-fold.ResultsTissue velocities were estimated by automated speckle tracking. Above 40 frames/s the peak velocity was reliably measured. When frame rate was lower, the inter-frame interval containing the instant of highest velocity also contained lower velocities, and therefore the average velocity in that interval was an underestimate of the clinically desired instantaneous maximum velocity.ConclusionsThe higher the frame rate, the more accurately maximum velocities are identified by speckle tracking, until the frame rate drops below 40 frames/s, beyond which there is little increase in peak velocity. We provide in an online supplement the vendor-independent software we used for automatic speckle-tracked velocity assessment to help others working in this field.
AU  - Negoita,M
AU  - Zolgharni,M
AU  - Dadkho,E
AU  - Pernigo,M
AU  - Mielewczik,M
AU  - Cole,GD
AU  - Dhutia,NM
AU  - Francis,DP
DO  - 10.1016/j.ijcard.2016.05.047
EP  - 36
PY  - 2016///
SN  - 1874-1754
SP  - 31
TI  - Frame rate required for speckle tracking echocardiography: A quantitative clinical study with open-source, vendor-independent software
T2  - International Journal of Cardiology
UR  - http://dx.doi.org/10.1016/j.ijcard.2016.05.047
UR  - http://hdl.handle.net/10044/1/64124
VL  - 218
ER  -
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