NDLI: 3D shear wave imaging of anisotropic mechanical properties of muscle using a 2D matrix array transducer

Content Provider	IEEE Xplore Digital Library
Author	Wang, M.H. Byram, B.C. Palmeri, M.L. Rouze, N.C. Nightingale, K.R.
Copyright Year	2012
Description	Author affiliation: Dept. of Biomed. Eng., Duke Univ., Durham, NC, USA (Wang, M.H.; Byram, B.C.; Palmeri, M.L.; Rouze, N.C.; Nightingale, K.R.)
Abstract	A 2D matrix array is used to monitor acoustic radiation force impulse (ARFI) induced shear wave propagation in 3D in excised canine muscle. From a single acquisition, both the shear wave phase and group velocity can be calculated within a plane of symmetry to estimate the shear wave speed (SWS) along and across the fibers, as well as the fiber orientation in 3D. The true fiber orientation found using the 3D Radon Transform (3D RT) on B-mode volumes of the muscle was used to verify the fiber direction. For the simplified imaging case when the ARFI push can be oriented perpendicular to the fibers, the error in estimating the fiber orientation using phase and group velocity measurements was 3.5 ± 2.6° and 3.4 ± 1.4° (mean ± standard deviation), over six acquisitions in different muscle samples. For the more general case when the push is oblique to the fibers, the angle between the push and the fibers (or orientation of the plane of symmetry) is found using the dominant orientation of the shear wave displacement magnitude. In 30 acquisitions on six different muscle samples with oblique push angles up to 40°, the median error in the estimated fiber orientation using phase and group velocity measurements was 5.2° and 4.7°, respectively, after accounting for the additional unknown push angle. Either the phase or group velocity measurements can be used to estimate fiber orientation and SWS along and across the fibers in a plane of symmetry. Although it is possible to estimate the orientation of the plane of symmetry when the push is oblique to the fibers, inaccurate measurements of fiber orientation and SWS along and across the fibers occurred for highly oblique push angles (>25°).
Starting Page	5
Ending Page	8
File Size	4884414
Page Count	4
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0002
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Muscles Velocity measurement Propagation Phase measurement Arrays Acoustics Ultrasonic imaging
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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