PMID- 35404815
OWN - NLM
STAT- MEDLINE
DCOM- 20220530
LR  - 20220623
IS  - 1525-8955 (Electronic)
IS  - 0885-3010 (Linking)
VI  - 69
IP  - 6
DP  - 2022 Jun
TI  - The Revisited Frequency-Shift Method for Shear Wave Attenuation Computation and 
      Imaging.
PG  - 2061-2074
LID - 10.1109/TUFFC.2022.3166448 [doi]
AB  - Ultrasound (US) shear wave (SW) elastography has been widely studied and 
      implemented on clinical systems to assess the elasticity of living organs. 
      Imaging of SW attenuation reflecting viscous properties of tissues has received 
      less attention. A revisited frequency shift (R-FS) method is proposed to improve 
      the robustness of SW attenuation imaging. Performances are compared with the FS 
      method that we originally proposed and with the two-point frequency shift (2P-FS) 
      and attenuation measuring US SW elastography (AMUSE) methods. In the proposed 
      R-FS method, the shape parameter of the gamma distribution fitting SW spectra is 
      assumed to vary with distance, in contrast to FS. Second, an adaptive random 
      sample consensus (A-RANSAC) line fitting method is used to prevent outlier 
      attenuation values in the presence of noise. Validation was made on ten simulated 
      phantoms with two viscosities (0.5 and 2 Pa [Formula: see text]) and different 
      noise levels (15 to -5 dB), two experimental homogeneous gel phantoms, and six in 
      vivo liver acquisitions on awake ducks (including three normal and three fatty 
      duck livers). According to the conducted experiments, R-FS revealed mean 
      reductions in coefficients of variation (CV) of 62.6% on simulations, 62.5% with 
      phantoms, and 62.3% in vivo compared with FS. Corresponding reductions compared 
      with 2P-FS were 45.4%, 77.1%, and 62.0%, respectively. Reductions in normalized 
      root-mean-square errors for simulations were 63.9% and 48.7% with respect to FS 
      and 2P-FS, respectively.
FAU - Yazdani, Ladan
AU  - Yazdani L
FAU - Bhatt, Manish
AU  - Bhatt M
FAU - Rafati, Iman
AU  - Rafati I
FAU - Tang, An
AU  - Tang A
FAU - Cloutier, Guy
AU  - Cloutier G
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20220526
PL  - United States
TA  - IEEE Trans Ultrason Ferroelectr Freq Control
JT  - IEEE transactions on ultrasonics, ferroelectrics, and frequency control
JID - 9882735
SB  - IM
MH  - *Elasticity Imaging Techniques/methods
MH  - Liver/diagnostic imaging
MH  - Phantoms, Imaging
MH  - Ultrasonography
MH  - Viscosity
EDAT- 2022/04/12 06:00
MHDA- 2022/05/31 06:00
CRDT- 2022/04/11 17:40
PHST- 2022/04/12 06:00 [pubmed]
PHST- 2022/05/31 06:00 [medline]
PHST- 2022/04/11 17:40 [entrez]
AID - 10.1109/TUFFC.2022.3166448 [doi]
PST - ppublish
SO  - IEEE Trans Ultrason Ferroelectr Freq Control. 2022 Jun;69(6):2061-2074. doi: 
      10.1109/TUFFC.2022.3166448. Epub 2022 May 26.