© 2004 by European Society of Cardiology
Copyright © 2004, The European Society of Cardiology
Tissue motion imaging of the left ventricle—quantification of myocardial strain, velocity, acceleration and displacement in a single image
aDivision of Medical Engineering, Karolinska Institutet, Novum F60, SE-14186 Huddinge, Sweden
bDepartment of Clinical Physiology, Karolinska University Hospital Huddinge, Stockholm, Sweden
cDepartment of Computer and Information Science, The Norwegian University of Science and Technology, Trondheim, Norway
Received 11 September 2003; received in revised form 4 February 2004; accepted after revision 24 February 2004.
* Corresponding author. Tel.: +46-8-585-83758; fax: +46-8-585-87779. camilla.storaa{at}labmed.ki.se
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Abstract |
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Aims: Several methods of parametric imaging of left ventricular function including tissue velocity imaging (TVI) and strain rate imaging (SRI) have previously been presented, however, they have the limitation that they can, respectively, portray only one physiological myocardial parameter. The aims of this pilot study were to implement and validate tissue motion imaging (TMI) for the first time, a visualization technique which permits acceleration, velocity, displacement and strain to be interpreted quantitatively or semi-quantitatively in a single image.
Methods and results: TMI is achieved by the color coding of temporal tissue velocity integrals. The principles behind this technique are validated, and case examples demonstrating its use in the clinical setting are provided. Limitations of the method as well as future applications and improvements are discussed.
Conclusion: As this method allows representation of a multitude of variables and is visually attractive, it may facilitate more widespread use of myocardial quantitation in everyday practice.
Keywords: Tissue motion; Tissue Doppler; Tissue tracking strain; Ventricular function