Speckle structure in three dimensions

Gregory R Bashford, Olaf T. von Ramm

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Ultrasound speckle has long been recognized as a noise source in diagnostic imaging. The advent of three-dimensional imaging and flow detection requires the characterization of the three-dimensional acoustical speckle pattern. Ultrasound data were acquired by using an automated three-dimensional translation stage to measure the radio-frequency (rf) backscatter signals from a volume scattering phantom. The data samples were processed off-line to locate and measure envelope-detected speckle peaks, i.e., local maxima. Results indicate that speckle has a distinctive structure in which three-dimensional peaks can be located and measured. These peaks are brighter on average than the mean speckle brightness level and are uniformly distributed throughout the volume. The lateral breadth of the speckle peaks, defined as the breadth of the -6 dB contour in the lateral-elevational plane, is over twice the width predicted by previous investigators. This is the first attempt to physically measure the breadth of bright spots in the speckle pattern. A rational for the discrepancy between previous theory and the measurement in this paper is given.

Original languageEnglish (US)
Pages (from-to)35-42
Number of pages8
JournalJournal of the Acoustical Society of America
Volume98
Issue number1
DOIs
StatePublished - Jan 1 1995

Fingerprint

speckle patterns
radio frequencies
brightness
envelopes
Three-dimensional
scattering
Ultrasound
Imaging
Three-dimensional Imaging
Diagnostics
Brightness

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Speckle structure in three dimensions. / Bashford, Gregory R; von Ramm, Olaf T.

In: Journal of the Acoustical Society of America, Vol. 98, No. 1, 01.01.1995, p. 35-42.

Research output: Contribution to journalArticle

@article{ba38f2ee2f7b4305afbea6fca2fd842c,
title = "Speckle structure in three dimensions",
abstract = "Ultrasound speckle has long been recognized as a noise source in diagnostic imaging. The advent of three-dimensional imaging and flow detection requires the characterization of the three-dimensional acoustical speckle pattern. Ultrasound data were acquired by using an automated three-dimensional translation stage to measure the radio-frequency (rf) backscatter signals from a volume scattering phantom. The data samples were processed off-line to locate and measure envelope-detected speckle peaks, i.e., local maxima. Results indicate that speckle has a distinctive structure in which three-dimensional peaks can be located and measured. These peaks are brighter on average than the mean speckle brightness level and are uniformly distributed throughout the volume. The lateral breadth of the speckle peaks, defined as the breadth of the -6 dB contour in the lateral-elevational plane, is over twice the width predicted by previous investigators. This is the first attempt to physically measure the breadth of bright spots in the speckle pattern. A rational for the discrepancy between previous theory and the measurement in this paper is given.",
author = "Bashford, {Gregory R} and {von Ramm}, {Olaf T.}",
year = "1995",
month = "1",
day = "1",
doi = "10.1121/1.413690",
language = "English (US)",
volume = "98",
pages = "35--42",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "1",

}

TY - JOUR

T1 - Speckle structure in three dimensions

AU - Bashford, Gregory R

AU - von Ramm, Olaf T.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - Ultrasound speckle has long been recognized as a noise source in diagnostic imaging. The advent of three-dimensional imaging and flow detection requires the characterization of the three-dimensional acoustical speckle pattern. Ultrasound data were acquired by using an automated three-dimensional translation stage to measure the radio-frequency (rf) backscatter signals from a volume scattering phantom. The data samples were processed off-line to locate and measure envelope-detected speckle peaks, i.e., local maxima. Results indicate that speckle has a distinctive structure in which three-dimensional peaks can be located and measured. These peaks are brighter on average than the mean speckle brightness level and are uniformly distributed throughout the volume. The lateral breadth of the speckle peaks, defined as the breadth of the -6 dB contour in the lateral-elevational plane, is over twice the width predicted by previous investigators. This is the first attempt to physically measure the breadth of bright spots in the speckle pattern. A rational for the discrepancy between previous theory and the measurement in this paper is given.

AB - Ultrasound speckle has long been recognized as a noise source in diagnostic imaging. The advent of three-dimensional imaging and flow detection requires the characterization of the three-dimensional acoustical speckle pattern. Ultrasound data were acquired by using an automated three-dimensional translation stage to measure the radio-frequency (rf) backscatter signals from a volume scattering phantom. The data samples were processed off-line to locate and measure envelope-detected speckle peaks, i.e., local maxima. Results indicate that speckle has a distinctive structure in which three-dimensional peaks can be located and measured. These peaks are brighter on average than the mean speckle brightness level and are uniformly distributed throughout the volume. The lateral breadth of the speckle peaks, defined as the breadth of the -6 dB contour in the lateral-elevational plane, is over twice the width predicted by previous investigators. This is the first attempt to physically measure the breadth of bright spots in the speckle pattern. A rational for the discrepancy between previous theory and the measurement in this paper is given.

UR - http://www.scopus.com/inward/record.url?scp=0029028286&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029028286&partnerID=8YFLogxK

U2 - 10.1121/1.413690

DO - 10.1121/1.413690

M3 - Article

VL - 98

SP - 35

EP - 42

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 1

ER -