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Three-dimensional myocardial strain estimation from volumetric ultrasound: experimental validation in an animal model

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Abstract
Although real-time three-dimensional echocardiography has the potential to allow for more accurate assessment of global and regional ventricular dynamics compared to the more traditional two-dimensional ultrasound examinations, it still requires rigorous testing and validation against other accepted techniques should it breakthrough as a standard examination in routine clinical practice. Very few studies have looked at a validation of regional functional indices in an in-vivo context. The aim of the present study therefore was to validate a previously proposed 3D strain estimation-method based on elastic registration of subsequent volumes on a segmental level in an animal model. Volumetric images were acquired with a GE Vivid7 ultrasound system in five open-chest sheep instrumented with ultrasonic microcrystals. Radial (epsilon(RR)), longitudinal (epsilon(LL)) and circumferential strain (epsilon(CC)) were estimated during four stages: at rest, during esmolol and dobutamine infusion, and during acute ischemia. Moderate correlations for epsilon(LL) (r=0.63; p<0.01) and epsilon(CC) (r=0.60; p=0.01) were obtained, whereas no significant radial correlation was found. These findings are comparable to the performance of the current state-of-the-art commercial 3D speckle tracking methods.
Keywords
REGISTRATION, ECHOCARDIOGRAPHY, Elastic registration, sonomicrometry, in-vivo setup, cardiac strain assessment, SPECKLE TRACKING

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MLA
Heyde, Brecht et al. “Three-dimensional Myocardial Strain Estimation from Volumetric Ultrasound: Experimental Validation in an Animal Model.” 2011 IEEE International Ultrasonics Symposium (IUS). New York, NY, USA: IEEE, 2012. 1862–1865. Print.
APA
Heyde, B., Jasaityte, R., Bouchez, S., Vandenheuvel, M., Loeckx, D., Claus, P., Wouters, P., et al. (2012). Three-dimensional myocardial strain estimation from volumetric ultrasound: experimental validation in an animal model. 2011 IEEE International Ultrasonics Symposium (IUS) (pp. 1862–1865). Presented at the IEEE International Ultrasonics Symposium 2011 (IUS 2011), New York, NY, USA: IEEE.
Chicago author-date
Heyde, Brecht, Ruta Jasaityte, Stefaan Bouchez, Michaël Vandenheuvel, Dirk Loeckx, Piet Claus, Patrick Wouters, and Jan D’hooge. 2012. “Three-dimensional Myocardial Strain Estimation from Volumetric Ultrasound: Experimental Validation in an Animal Model.” In 2011 IEEE International Ultrasonics Symposium (IUS), 1862–1865. New York, NY, USA: IEEE.
Chicago author-date (all authors)
Heyde, Brecht, Ruta Jasaityte, Stefaan Bouchez, Michaël Vandenheuvel, Dirk Loeckx, Piet Claus, Patrick Wouters, and Jan D’hooge. 2012. “Three-dimensional Myocardial Strain Estimation from Volumetric Ultrasound: Experimental Validation in an Animal Model.” In 2011 IEEE International Ultrasonics Symposium (IUS), 1862–1865. New York, NY, USA: IEEE.
Vancouver
1.
Heyde B, Jasaityte R, Bouchez S, Vandenheuvel M, Loeckx D, Claus P, et al. Three-dimensional myocardial strain estimation from volumetric ultrasound: experimental validation in an animal model. 2011 IEEE International Ultrasonics Symposium (IUS). New York, NY, USA: IEEE; 2012. p. 1862–5.
IEEE
[1]
B. Heyde et al., “Three-dimensional myocardial strain estimation from volumetric ultrasound: experimental validation in an animal model,” in 2011 IEEE International Ultrasonics Symposium (IUS), Orlando, FL, USA, 2012, pp. 1862–1865.
@inproceedings{3262964,
  abstract     = {Although real-time three-dimensional echocardiography has the potential to allow for more accurate assessment of global and regional ventricular dynamics compared to the more traditional two-dimensional ultrasound examinations, it still requires rigorous testing and validation against other accepted techniques should it breakthrough as a standard examination in routine clinical practice. Very few studies have looked at a validation of regional functional indices in an in-vivo context. The aim of the present study therefore was to validate a previously proposed 3D strain estimation-method based on elastic registration of subsequent volumes on a segmental level in an animal model. Volumetric images were acquired with a GE Vivid7 ultrasound system in five open-chest sheep instrumented with ultrasonic microcrystals. Radial (epsilon(RR)), longitudinal (epsilon(LL)) and circumferential strain (epsilon(CC)) were estimated during four stages: at rest, during esmolol and dobutamine infusion, and during acute ischemia. Moderate correlations for epsilon(LL) (r=0.63; p<0.01) and epsilon(CC) (r=0.60; p=0.01) were obtained, whereas no significant radial correlation was found. These findings are comparable to the performance of the current state-of-the-art commercial 3D speckle tracking methods.},
  author       = {Heyde, Brecht and Jasaityte, Ruta and Bouchez, Stefaan and Vandenheuvel, Michaël and Loeckx, Dirk and Claus, Piet and Wouters, Patrick and D'hooge, Jan},
  booktitle    = {2011 IEEE International Ultrasonics Symposium (IUS)},
  isbn         = {9781457712524},
  keywords     = {REGISTRATION,ECHOCARDIOGRAPHY,Elastic registration,sonomicrometry,in-vivo setup,cardiac strain assessment,SPECKLE TRACKING},
  language     = {eng},
  location     = {Orlando, FL, USA},
  pages        = {1862--1865},
  publisher    = {IEEE},
  title        = {Three-dimensional myocardial strain estimation from volumetric ultrasound: experimental validation in an animal model},
  url          = {http://dx.doi.org/10.1109/ULTSYM.2011.0465},
  year         = {2012},
}

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