Detection probabilities for time-domain velocity estimation

Jørgen Arendt Jensen

doi:10.1109/ULTSYM.1991.234056

Detection probabilities for time-domain velocity estimation

Jørgen Arendt Jensen

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Abstract

Estimation of blood velocities by time-domain cross-correlation of successive high frequency sampled ultrasound signals is investigated. It is shown that any velocity can result from the estimator regardless of the true velocity due to the nonlinear technique employed. Using a simple simulation programs, it is demonstrated that the probability of correct estimation depends on the signal-to-noise ratio, transducer bandwidth, number of A-lines and number of samples used in the correlation estimate. The influence of applying a stationary echo-canceler is explained. The echo canceling can be modeled as a filter with a transfer function depending on the actual velocity. This influences the detection probability, which gets lower at certain velocities. An index directly reflecting the probability of detection can easily be calculated from the cross-correlation estimated. This makes it possible to assess the reliability of the velocity estimate in real time

Original language	English
Title of host publication	IEEE Ultrasonics Symposium Proceedings
Volume	Volume 2
Publisher	IEEE
Publication date	1991
Pages	1291-1296
DOIs	https://doi.org/10.1109/ULTSYM.1991.234056
Publication status	Published - 1991
Event	1991 IEEE Ultrasonics Symposium - Orlando, United States Duration: 8 Dec 1991 → 11 Dec 1991 http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=886

Conference

Conference	1991 IEEE Ultrasonics Symposium
Country/Territory	United States
City	Orlando
Period	08/12/1991 → 11/12/1991
Internet address	http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=886

Bibliographical note

Copyright: 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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@inproceedings{745af6cce0ac49b096501e78bb1aaa5f,

title = "Detection probabilities for time-domain velocity estimation",

abstract = "Estimation of blood velocities by time-domain cross-correlation of successive high frequency sampled ultrasound signals is investigated. It is shown that any velocity can result from the estimator regardless of the true velocity due to the nonlinear technique employed. Using a simple simulation programs, it is demonstrated that the probability of correct estimation depends on the signal-to-noise ratio, transducer bandwidth, number of A-lines and number of samples used in the correlation estimate. The influence of applying a stationary echo-canceler is explained. The echo canceling can be modeled as a filter with a transfer function depending on the actual velocity. This influences the detection probability, which gets lower at certain velocities. An index directly reflecting the probability of detection can easily be calculated from the cross-correlation estimated. This makes it possible to assess the reliability of the velocity estimate in real time",

author = "Jensen, \{J{\o}rgen Arendt\}",

note = "Copyright: 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 1991 IEEE Ultrasonics Symposium, IUS 1991 ; Conference date: 08-12-1991 Through 11-12-1991",

year = "1991",

doi = "10.1109/ULTSYM.1991.234056",

language = "English",

volume = "Volume 2",

pages = "1291--1296",

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publisher = "IEEE",

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TY - GEN

T1 - Detection probabilities for time-domain velocity estimation

AU - Jensen, Jørgen Arendt

N1 - Copyright: 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

PY - 1991

Y1 - 1991

N2 - Estimation of blood velocities by time-domain cross-correlation of successive high frequency sampled ultrasound signals is investigated. It is shown that any velocity can result from the estimator regardless of the true velocity due to the nonlinear technique employed. Using a simple simulation programs, it is demonstrated that the probability of correct estimation depends on the signal-to-noise ratio, transducer bandwidth, number of A-lines and number of samples used in the correlation estimate. The influence of applying a stationary echo-canceler is explained. The echo canceling can be modeled as a filter with a transfer function depending on the actual velocity. This influences the detection probability, which gets lower at certain velocities. An index directly reflecting the probability of detection can easily be calculated from the cross-correlation estimated. This makes it possible to assess the reliability of the velocity estimate in real time

AB - Estimation of blood velocities by time-domain cross-correlation of successive high frequency sampled ultrasound signals is investigated. It is shown that any velocity can result from the estimator regardless of the true velocity due to the nonlinear technique employed. Using a simple simulation programs, it is demonstrated that the probability of correct estimation depends on the signal-to-noise ratio, transducer bandwidth, number of A-lines and number of samples used in the correlation estimate. The influence of applying a stationary echo-canceler is explained. The echo canceling can be modeled as a filter with a transfer function depending on the actual velocity. This influences the detection probability, which gets lower at certain velocities. An index directly reflecting the probability of detection can easily be calculated from the cross-correlation estimated. This makes it possible to assess the reliability of the velocity estimate in real time

U2 - 10.1109/ULTSYM.1991.234056

DO - 10.1109/ULTSYM.1991.234056

M3 - Article in proceedings

VL - Volume 2

SP - 1291

EP - 1296

BT - IEEE Ultrasonics Symposium Proceedings

PB - IEEE

T2 - 1991 IEEE Ultrasonics Symposium

Y2 - 8 December 1991 through 11 December 1991

ER -

Detection probabilities for time-domain velocity estimation

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