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Ultrasound Imaging. Chapter 13

Abstract

In the conventional method of ultrasonography, images are acquired in reflection, or pulse echo, mode. An array of small piezoelectric elements transmits a focused pulse along a specified line of sight known as a scan line. Echoes returning from the tissue are received by the same array, focused via the delay-and-sum beam forming process reviewed in Section 13.2, and demodulated to obtain the magnitude, or envelope, of the echo signal. The scanner measures the arrival time of the echoes relative to the time the pulse was transmitted and maps the arrival time to the distance from the array, using an assumed speed of sound. The earliest ultrasound systems would display the result of a single pulse acquisition in 1-D A-mode (amplitude mode) format by plotting echo magnitude as a function of distance. A 2-D or 3-D B-mode (brightness mode) image is acquired by performing a large number of pulse echo acquisitions, incrementally increasing the scan line direction between each pulse echo operation, to sweep out a 2-D or 3-D field of view (FOV). The term B-mode imaging reflects the fact that the echo magnitude from each point in the FOV is mapped to the grey level, or brightness, of the  More>>
Authors:
Lacefield, J. C. [1] 
  1. University of Western Ontario, London (Canada)
Publication Date:
Sep 15, 2014
Product Type:
Book
Resource Relation:
Other Information: Figs.; Related Information: In: Diagnostic radiology physics: A handbook for teachers and students. Endorsed by: American Association of Physicists in Medicine, Asia-Oceania Federation of Organizations for Medical Physics, European Federation of Organisations for Medical Physics| by Dance, D.R. [Royal Surrey County Hospital, Guildford (United Kingdom)]; Christofides, S. [New Nicosia General Hospital (Cyprus)]; Maidment, A.D.A. [University of Pennsylvania (United States)]; McLean, I.D. [International Atomic Energy Agency, Vienna (Austria)]; Ng, K.H. (ed.) [University of Malaya, Kuala Lumpur (Malaysia)]| 710 p.
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; AMPLITUDES; ANIMAL TISSUES; FORMATES; IMAGE PROCESSING; IMAGES; PIEZOELECTRICITY; REVIEWS; ULTRASONOGRAPHY
OSTI ID:
22360636
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISBN 978-92-0-131010-1; TRN: XA14M6986065930
Availability:
Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/Pub1564webNew-74666420.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 311-331
Announcement Date:
Jul 28, 2015

Citation Formats

Lacefield, J. C. Ultrasound Imaging. Chapter 13. IAEA: N. p., 2014. Web.
Lacefield, J. C. Ultrasound Imaging. Chapter 13. IAEA.
Lacefield, J. C. 2014. "Ultrasound Imaging. Chapter 13." IAEA.
@misc{etde_22360636,
title = {Ultrasound Imaging. Chapter 13}
author = {Lacefield, J. C.}
abstractNote = {In the conventional method of ultrasonography, images are acquired in reflection, or pulse echo, mode. An array of small piezoelectric elements transmits a focused pulse along a specified line of sight known as a scan line. Echoes returning from the tissue are received by the same array, focused via the delay-and-sum beam forming process reviewed in Section 13.2, and demodulated to obtain the magnitude, or envelope, of the echo signal. The scanner measures the arrival time of the echoes relative to the time the pulse was transmitted and maps the arrival time to the distance from the array, using an assumed speed of sound. The earliest ultrasound systems would display the result of a single pulse acquisition in 1-D A-mode (amplitude mode) format by plotting echo magnitude as a function of distance. A 2-D or 3-D B-mode (brightness mode) image is acquired by performing a large number of pulse echo acquisitions, incrementally increasing the scan line direction between each pulse echo operation, to sweep out a 2-D or 3-D field of view (FOV). The term B-mode imaging reflects the fact that the echo magnitude from each point in the FOV is mapped to the grey level, or brightness, of the corresponding pixel in the image.}
place = {IAEA}
year = {2014}
month = {Sep}
}