TY - GEN
T1 - Spatial angular compounding for ultrasound elastography
AU - Techavipoo, U.
AU - Chen, Q.
AU - Varghese, T.
AU - Zagzebski, J. A.
AU - Madsen, E. L.
PY - 2004
Y1 - 2004
N2 - In this article, a new approach is described that enables the reduction of noise artifacts in elastography without a significant reduction in either the contrast or spatial resolution. The technique uses angular weighted compounding of local angular strains estimated from echo signals scanned at different insonification angles. Strain estimated along angular insonification directions can be separated into strain tensor components along the axial (direction of compression) and lateral directions. The mechanical stimulus is applied only along one direction. Angular weighting factors are derived from the relationship between the axial and lateral strains under the ' assumption of tissue incompressibility. Experimental results using a uniformly elastic tissue-mimicking phantom demonstrate the improvement in the SNR e obtained with angular weighted compounding. Variation in the SNR e obtained using different angular increments is also investigated. Elastograms obtained from an inclusion phantom also demonstrate the improvement in contrast detail resolution.
AB - In this article, a new approach is described that enables the reduction of noise artifacts in elastography without a significant reduction in either the contrast or spatial resolution. The technique uses angular weighted compounding of local angular strains estimated from echo signals scanned at different insonification angles. Strain estimated along angular insonification directions can be separated into strain tensor components along the axial (direction of compression) and lateral directions. The mechanical stimulus is applied only along one direction. Angular weighting factors are derived from the relationship between the axial and lateral strains under the ' assumption of tissue incompressibility. Experimental results using a uniformly elastic tissue-mimicking phantom demonstrate the improvement in the SNR e obtained with angular weighted compounding. Variation in the SNR e obtained using different angular increments is also investigated. Elastograms obtained from an inclusion phantom also demonstrate the improvement in contrast detail resolution.
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M3 - Conference contribution
AN - SCOPUS:17144391535
SN - 0780383885
SN - 9780780383883
T3 - 2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano
SP - 972
EP - 975
BT - 2004 2nd IEEE International Symposium on Biomedical Imaging
T2 - 2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano
Y2 - 15 April 2004 through 18 April 2004
ER -