PMID- 34780324
OWN - NLM
STAT- MEDLINE
DCOM- 20220328
LR  - 20220401
IS  - 1525-8955 (Electronic)
IS  - 0885-3010 (Linking)
VI  - 69
IP  - 2
DP  - 2022 Feb
TI  - Multiperspective Bistatic Ultrasound Imaging and Elastography of the Ex Vivo 
      Abdominal Aorta.
PG  - 604-616
LID - 10.1109/TUFFC.2021.3128227 [doi]
AB  - Knowledge of aneurysm geometry and local mechanical wall parameters using 
      ultrasound (US) can contribute to a better prediction of rupture risk in 
      abdominal aortic aneurysms (AAAs). However, aortic strain imaging using 
      conventional US is limited by the lateral lumen-wall contrast and resolution. In 
      this study, ultrafast multiperspective bistatic (MP BS) imaging is used to 
      improve aortic US, in which two curved array transducers receive simultaneously 
      on each transmit event. The advantage of such bistatic US imaging on both image 
      quality and strain estimations was investigated by comparing it to 
      single-perspective monostatic (SP MS) and MP monostatic (MP MS) imaging, i.e., 
      alternately transmitting and receiving with either transducer. Experimental 
      strain imaging was performed in US simulations and in an experimental study on 
      porcine aortas. Different compounding strategies were tested to retrieve the most 
      useful information from each received US signal. Finally, apart from the 
      conventional sector grid in curved array US imaging, a polar grid with respect to 
      the vessel's local coordinate system is introduced. This new reconstruction 
      method demonstrated improved displacement estimations in aortic US. The US 
      simulations showed increased strain estimation accuracy using MP BS imaging 
      bistatic imaging compared to MP MS imaging, with a decrease in the average 
      relative error between 41% and 84% in vessel wall regions between transducers. In 
      the experimental results, the mean image contrast-to-noise ratio was improved by 
      up to 8 dB in the vessel wall regions between transducers. This resulted in an 
      increased mean elastographic signal-to-noise ratio by about 15 dB in radial 
      strain and 6 dB in circumferential strain.
FAU - van Hal, Vera H J
AU  - van Hal VHJ
FAU - De Hoop, Hein
AU  - De Hoop H
FAU - Muller, Jan-Willem
AU  - Muller JW
FAU - van Sambeek, Marc R H M
AU  - van Sambeek MRHM
FAU - Schwab, Hans-Martin
AU  - Schwab HM
FAU - Lopata, Richard G P
AU  - Lopata RGP
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20220127
PL  - United States
TA  - IEEE Trans Ultrason Ferroelectr Freq Control
JT  - IEEE transactions on ultrasonics, ferroelectrics, and frequency control
JID - 9882735
SB  - IM
MH  - Animals
MH  - Aorta, Abdominal/diagnostic imaging
MH  - *Aortic Aneurysm, Abdominal/diagnostic imaging
MH  - *Elasticity Imaging Techniques/methods
MH  - Stress, Mechanical
MH  - Swine
MH  - Ultrasonography
EDAT- 2021/11/16 06:00
MHDA- 2022/03/29 06:00
CRDT- 2021/11/15 17:16
PHST- 2021/11/16 06:00 [pubmed]
PHST- 2022/03/29 06:00 [medline]
PHST- 2021/11/15 17:16 [entrez]
AID - 10.1109/TUFFC.2021.3128227 [doi]
PST - ppublish
SO  - IEEE Trans Ultrason Ferroelectr Freq Control. 2022 Feb;69(2):604-616. doi: 
      10.1109/TUFFC.2021.3128227. Epub 2022 Jan 27.