TY - GEN
T1 - Evaluation of 2-D speckle tracking based Strain Rate Imaging (SRI) using a 3-D heart simulation model
AU - Chen, X.
AU - Li, X.
AU - Sahn, D.
AU - Kim, K.
AU - Xie, H.
AU - O'Donnell, M.
PY - 2004
Y1 - 2004
N2 - Preliminary 2-D SRI results from a porcine heart model showed significant average residual accumulation error (RAE) in the total displacement, similar to widely reported baseline drift artifacts in SRI [1-2]. Therefore, to understand the performance of 2-D SRI methods in a controlled 3-D environment, a left-ventricle simulation model with physiological deformation was developed. Torsion was added to move tissue in and out of the image plane. A phasedarray imaging system was simulated to generate 2-D image sequences for typical cardiac scans. Results show the presence of RAE, which reaches a minimum at a frame rate (FR) of 75 frame/cycle corresponding to 2-3% peak frame-to-frame strain. RAE increases as torsion increases. In addition, the RAE map also spatially correlates well with both out-of-plane motion and cross-correlation coefficient maps. These results suggest that out-of-plane motion plays a significant role in RAE. To optimize SNR in displacement estimates, a retrospective processing strategy employing different frame intervals for different periods in a cardiac cycle is presented.
AB - Preliminary 2-D SRI results from a porcine heart model showed significant average residual accumulation error (RAE) in the total displacement, similar to widely reported baseline drift artifacts in SRI [1-2]. Therefore, to understand the performance of 2-D SRI methods in a controlled 3-D environment, a left-ventricle simulation model with physiological deformation was developed. Torsion was added to move tissue in and out of the image plane. A phasedarray imaging system was simulated to generate 2-D image sequences for typical cardiac scans. Results show the presence of RAE, which reaches a minimum at a frame rate (FR) of 75 frame/cycle corresponding to 2-3% peak frame-to-frame strain. RAE increases as torsion increases. In addition, the RAE map also spatially correlates well with both out-of-plane motion and cross-correlation coefficient maps. These results suggest that out-of-plane motion plays a significant role in RAE. To optimize SNR in displacement estimates, a retrospective processing strategy employing different frame intervals for different periods in a cardiac cycle is presented.
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U2 - 10.1109/ULTSYM.2004.1418257
DO - 10.1109/ULTSYM.2004.1418257
M3 - Conference contribution
AN - SCOPUS:21644445728
SN - 0780384121
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 2125
EP - 2128
BT - Proceedings - 2004 IEEE Ultrasonics Symposium
A2 - Yuhas, M.P.
T2 - 2004 IEEE Ultrasonics Symposium
Y2 - 23 August 2004 through 27 August 2004
ER -