In vitro evaluation of myocardial deformation measurement accuracy
Main content
Cardiac deformation can be measured as strain, rotation and twist by speckle tracking methods. To optimize these measurements, an in vitro set up has been developed in our experimental laboratory using polyvinyl alcohol elastic phantoms. This set-up was developed in collaboration with the Department of Physics and Technology, University of Bergen, Norway.
Several studies have been performed and published including:
1. Optimization of echocardiographic measurements of deformation in phantoms mimicking the newborn heart
Strain measurement in a small left ventricular phantom
2. Accuracy of left ventricular 3D strain measurements in the adult heart
Adult sized left ventricular phantom with sonomicrometer crystals
3D visualization
Ongoing projects include the assessment of the accuracy of multilayer strain measurements and measurement of ventricular rotation and twist.
Experimental ultrasound laboratory
These studies are carried out in our laboratory which is equipped with Vivid 7 and Vivid E9 scanners from GE Vingmed Ultrasound, reference method with implanted crystals from Sonometrics and workstations with different software for analysis of both experimental and clinical based ultrasound recordings.
Pump and sonomicrometry instrumentation
Ultrasound scanner and in vitro set-up
Johannes J. Hjertaas (PhD candidate): Accuracy of 3D echocardiographic strain and twist measurements in vitro
Umael Khan (MD): Optimizing frame rate and frequency for pediatric cardiac strain measurements
Collaborator: professor Gottfried Greve, K2
Contact person: Knut Matre (knut.matre@uib.no)