The Resource Wavelet analysis of electroretinograms and its clinical application, by Srinivasa Varadharajan

Wavelet analysis of electroretinograms and its clinical application, by Srinivasa Varadharajan

Label
Wavelet analysis of electroretinograms and its clinical application
Title
Wavelet analysis of electroretinograms and its clinical application
Statement of responsibility
by Srinivasa Varadharajan
Creator
Contributor
Subject
Language
eng
Summary
"The electroretinogram (ERG) is a powerful clinical technique used in clinics around the world to diagnose and monitor the health of the retina. The ERG is the record of the electrical activity of the retina in response to light. Under scotopic conditions (for low light levels, approximately less than 10 scotopic trolands), the human ERG in response to a flash of white light has a specific form: an initial negative deflection called the a-wave, followed by a positive deflection called the b-wave which then falls back to zero. Superimposed on the b-waves are a few high frequency oscillatory potentials. Daubechies D4 wavelets were used to do an eight scale multiresolution analysis of these waves. The most important wavelet coefficients that contribute to the various components of the ERG were identified using the following procedure: (i) Contribution of each wavelet coefficient to the L1-norm of the wave is determined; (ii) Only coefficients which contribute at least 2.5% of the maximum contribution are retained; (iii) From this reduced set only those coefficients that contribute to signals within 2 standard deviation from the norm are retained as the best basis; (iv) ERG signals were reconstructed using these best basis; (v) The coefficients that contribute to different components of the ERG were directly read from scalograms of these reconstructed waves. Best basis were obtained for normal ERGs as well as ERGs obtained from patients with Rod-cone dystrophy and Duchenne muscular dystrophy. The differences in the basis sets are used to hypothesize the differences in the physiological mechanisms involved in the production of these pathological ERGs"--Abstract, leaf iii
Related
Cataloging source
UMS
http://library.link/vocab/creatorDate
1970-
http://library.link/vocab/creatorName
Varadharajan, L. Srinivasa
Degree
Ph. D.
Dissertation year
2002.
Granting institution
University of Missouri--Rolla and University of Missouri--St. Louis
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • bibliography
  • theses
http://library.link/vocab/relatedWorkOrContributorName
  • University of Missouri--Rolla
  • University of Missouri--St. Louis
http://library.link/vocab/subjectName
  • Electroretinography
  • Electrodiagnosis
  • Wavelets (Mathematics)
Label
Wavelet analysis of electroretinograms and its clinical application, by Srinivasa Varadharajan
Instantiates
Publication
Note
  • Thesis completed as part of a cooperative degree program with the University of Missouri--Rolla and the University of Missouri--St. Louis
  • Vita
Bibliography note
Includes bibliographical references (leaves 116-119)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier.
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Control code
50997000
Dimensions
29 cm.
Extent
xii, 120 leaves
Media category
unmediated
Media MARC source
rdamedia.
Media type code
  • n
Other physical details
illustrations
System control number
(OCoLC)50997000
Label
Wavelet analysis of electroretinograms and its clinical application, by Srinivasa Varadharajan
Publication
Note
  • Thesis completed as part of a cooperative degree program with the University of Missouri--Rolla and the University of Missouri--St. Louis
  • Vita
Bibliography note
Includes bibliographical references (leaves 116-119)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier.
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Control code
50997000
Dimensions
29 cm.
Extent
xii, 120 leaves
Media category
unmediated
Media MARC source
rdamedia.
Media type code
  • n
Other physical details
illustrations
System control number
(OCoLC)50997000

Library Locations

    • Curtis Laws Wilson LibraryBorrow it
      400 West 14th Street, Rolla, MO, 65409, US
      37.955220 -91.772210
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