Optimization of Transmit Parameters in Cardiac Strain Imaging With Full and Partial Aperture Coherent Compounding

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Vincent SaysengElisa E Konofagou

Abstract

Coherent compounding methods using the full or partial transmit aperture have been investigated as a possible means of increasing strain measurement accuracy in cardiac strain imaging; however, the optimal transmit parameters in either compounding approach have yet to be determined. The relationship between strain estimation accuracy and transmit parameters-specifically the subaperture, angular aperture, tilt angle, number of virtual sources, and frame rate-in partial aperture (subaperture compounding) and full aperture (steered compounding) fundamental mode cardiac imaging was thus investigated and compared. Field II simulation of a 3-D cylindrical annulus undergoing deformation and twist was developed to evaluate accuracy of 2-D strain estimation in cross-sectional views. The tradeoff between frame rate and number of virtual sources was then investigated via transthoracic imaging in the parasternal short-axis view of five healthy human subjects, using the strain filter to quantify estimation precision. Finally, the optimized subaperture compounding sequence (25-element subperture, 90° angular aperture, 10 virtual sources, 300-Hz frame rate) was compared to the optimized steered compounding sequence (60° angular aperture, 15° ...Continue Reading

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Citations

Oct 5, 2019·Physics in Medicine and Biology·Vincent SaysengElisa Konofagou
Feb 7, 2020·Physics in Medicine and Biology·Rashid Al MukaddimTomy Varghese
Aug 1, 2020·Ultrasound in Medicine & Biology·Vincent SaysengElisa Konofagou

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