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Waveform Pattern Recognition – A New Semiquantitative Method for Analysis of Fetal Aortic and Umbilical Artery Blood Flow Velocity Recorded by Doppler Ultrasound

Malcus, Peter LU ; Andersson, Jens A LU ; Marsal, Karel LU and Olofsson, Per Åke LU (1991) In Ultrasound in Medicine and Biology 17(5). p.453-460
Abstract
A semiquantitative computerized waveform pattern recognition system for analysis of the fetal descending aortic and umbilical artery Doppler flow velocity waveforms is presented. Based on empirically and manually selected clinical recordings from both vessels, 11 computerized and normalized standard curves for the aorta (type curves A to K), and 10 curves for the umbilical artery (type curves a to j) were constructed. The best match between the normalized waveform and the standard curve was based on either the degree of absent diastolic flow or, in cases with positive diastolic flow, on the calculation of the least square sum of the difference. The pattern recognition was tested against conventional waveform indices and our older... (More)
A semiquantitative computerized waveform pattern recognition system for analysis of the fetal descending aortic and umbilical artery Doppler flow velocity waveforms is presented. Based on empirically and manually selected clinical recordings from both vessels, 11 computerized and normalized standard curves for the aorta (type curves A to K), and 10 curves for the umbilical artery (type curves a to j) were constructed. The best match between the normalized waveform and the standard curve was based on either the degree of absent diastolic flow or, in cases with positive diastolic flow, on the calculation of the least square sum of the difference. The pattern recognition was tested against conventional waveform indices and our older semiquantitative Blood Flow Class (BFC) system in 472 clinical consecutive Doppler recordings. A good correlation was found. This new relatively simple computer-based method for waveform analysis is now prospectively applied in clinical studies. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ultrasound in Medicine and Biology
volume
17
issue
5
pages
453 - 460
publisher
Elsevier
external identifiers
  • scopus:0025944707
ISSN
0301-5629
DOI
10.1016/0301-5629(91)90181-U
language
English
LU publication?
yes
id
ac2cba9d-c3bc-4687-82db-0132f4b853c6 (old id 1045038)
date added to LUP
2008-03-10 14:23:07
date last changed
2017-01-01 07:39:40
@article{ac2cba9d-c3bc-4687-82db-0132f4b853c6,
  abstract     = {A semiquantitative computerized waveform pattern recognition system for analysis of the fetal descending aortic and umbilical artery Doppler flow velocity waveforms is presented. Based on empirically and manually selected clinical recordings from both vessels, 11 computerized and normalized standard curves for the aorta (type curves A to K), and 10 curves for the umbilical artery (type curves a to j) were constructed. The best match between the normalized waveform and the standard curve was based on either the degree of absent diastolic flow or, in cases with positive diastolic flow, on the calculation of the least square sum of the difference. The pattern recognition was tested against conventional waveform indices and our older semiquantitative Blood Flow Class (BFC) system in 472 clinical consecutive Doppler recordings. A good correlation was found. This new relatively simple computer-based method for waveform analysis is now prospectively applied in clinical studies.},
  author       = {Malcus, Peter and Andersson, Jens A and Marsal, Karel and Olofsson, Per Åke},
  issn         = {0301-5629},
  language     = {eng},
  number       = {5},
  pages        = {453--460},
  publisher    = {Elsevier},
  series       = {Ultrasound in Medicine and Biology},
  title        = {Waveform Pattern Recognition – A New Semiquantitative Method for Analysis of Fetal Aortic and Umbilical Artery Blood Flow Velocity Recorded by Doppler Ultrasound},
  url          = {http://dx.doi.org/10.1016/0301-5629(91)90181-U},
  volume       = {17},
  year         = {1991},
}