TY - GEN
T1 - Shear wave estimation using null space pursuit and AM-FM demodulation
AU - Rojas, Renan
AU - Ormachea, Juvenal
AU - Parker, Kevin J.
AU - Castaneda, Benjamin
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/11/13
Y1 - 2015/11/13
N2 - Crawling wave sonoelastography enables the measurement of viscoelastic properties of soft tissue. Recently, the dominant component analysis AM-FM method was proposed for modeling non-stationary patterns in crawling wave sonoelastography to locally estimate their shear wave speed. Although evaluations show consistent results for homogeneous and inhomogeneous phantoms, high noise levels and few available data samples do not allow a rigorous spectral analysis by using a filterbank. We propose a novel method to isolate AM-FM components based on the null space pursuit algorithm that alleviates such limitations. Preliminary results for the proposed method for homogeneous and inhomogeneous phantoms, and a comparison to alternative methods are presented.
AB - Crawling wave sonoelastography enables the measurement of viscoelastic properties of soft tissue. Recently, the dominant component analysis AM-FM method was proposed for modeling non-stationary patterns in crawling wave sonoelastography to locally estimate their shear wave speed. Although evaluations show consistent results for homogeneous and inhomogeneous phantoms, high noise levels and few available data samples do not allow a rigorous spectral analysis by using a filterbank. We propose a novel method to isolate AM-FM components based on the null space pursuit algorithm that alleviates such limitations. Preliminary results for the proposed method for homogeneous and inhomogeneous phantoms, and a comparison to alternative methods are presented.
UR - http://www.scopus.com/inward/record.url?scp=84962040447&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2015.0378
DO - 10.1109/ULTSYM.2015.0378
M3 - Conference contribution
AN - SCOPUS:84962040447
T3 - 2015 IEEE International Ultrasonics Symposium, IUS 2015
BT - 2015 IEEE International Ultrasonics Symposium, IUS 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Ultrasonics Symposium, IUS 2015
Y2 - 21 October 2015 through 24 October 2015
ER -