NDLI: Continuous wave ultrasonic tomography

Content Provider	IEEE Xplore Digital Library
Author	Hai-Dong Liang Halliwell, M. Wells, P.N.T.
Copyright Year	1986
Abstract	As an object rotates with respect to a stationary ultrasonic beam, the scattering centers within the object return echoes that are Doppler-shifted in frequency by amounts depending on the velocities of the individual scatterers. The scattering centers that lie on a line of constant cross-range all have the same effective velocity in the direction pointing toward the transducer; therefore, the backscattered echo amplitude at any particular frequency is the line integral of the scattered radiation at the cross-range corresponding to that frequency. The amplitudes of the returned signals at other frequencies give the line integrals for the scatterers at the corresponding cross-ranges. The amplitude as a function of frequency can be interpreted as a tomographic projection. A continuum of the projections at different positions is generated while the object is rotating. A tomographic reconstruction algorithm can produce an image of the distribution of scattering centers in the insonified object from these projections. A microscanner was developed to investigate the approach of using continuous wave (CW) ultrasound for cross-sectional imaging. The resolution is limited by the target size and the ultrasonic wavelength.
Page Count	8
File Size	625652
Starting Page	285
Ending Page	292
File Format	PDF
ISSN	08853010
Volume Number	48
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Scattering Ultrasonic imaging Structural beams Computed tomography Ultrasonic transducers Reconstruction algorithms Helium Optical reflection Councils
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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

Computed Ultrasonic Reflection Tomography

Transmit beams adapted to reverberation noise suppression using dual-frequency SURF imaging

Three-dimensional ultrasonic reflection and attenuation imaging

Air-coupled through-transmission fan-beam tomography using divergent capacitive ultrasonic transducers

Triple-beam lens transducers for three-dimensional ultrasonic fluid flow estimation

A Two-Dimensional Array Receiver for Reducing Refraction Artifacts in Ultrasonic Computed Tomography of Attenuation

Air-coupled Lamb wave tomography

Ultrasonic computed tomography reconstruction of the attenuation coefficient using a linear array

Producing acoustic frozen waves: simulated experiments

Continuous wave ultrasonic tomography

Similar Documents

Computed Ultrasonic Reflection Tomography

Transmit beams adapted to reverberation noise suppression using dual-frequency SURF imaging

Three-dimensional ultrasonic reflection and attenuation imaging

Air-coupled through-transmission fan-beam tomography using divergent capacitive ultrasonic transducers

Triple-beam lens transducers for three-dimensional ultrasonic fluid flow estimation

A Two-Dimensional Array Receiver for Reducing Refraction Artifacts in Ultrasonic Computed Tomography of Attenuation

Air-coupled Lamb wave tomography

Ultrasonic computed tomography reconstruction of the attenuation coefficient using a linear array

Producing acoustic frozen waves: simulated experiments

Continuous wave ultrasonic tomography