1. Analysis of femoral artery Doppler signals by LaPlace transform damping method 
J.Dennis Baker, M.D., Herbert I. Machleder, M.D., Robert Skidmore, Ph.D. 
Journal of Vascular Surgery 
Volume 1, Issue 4, Pages (July 1984)
DOI: / (84)
Copyright © 1984 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

2. Fig. 1
Block diagram of equipment used for storing and analyzing Doppler velocity signals.
Journal of Vascular Surgery 1984 1, DOI: ( / (84) )
Copyright © 1984 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

3. Fig. 2
Computer and related equipment used in study. Cabinet under video monitor contains both Doppler velocity detector and mean velocity signal processor.
Journal of Vascular Surgery 1984 1, DOI: ( / (84) )
Copyright © 1984 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

4. Fig. 3
Results of Doppler signal analysis in different patient groups. A, Damping factor from LTD analysis. B, Pulsatility index (x's indicate limbs with superficial femoral artery occlusion).
Journal of Vascular Surgery 1984 1, DOI: ( / (84) )
Copyright © 1984 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions

5. Fig. 4 ROC curves show diagnostic accuracies for LTD and PI methods.
Journal of Vascular Surgery 1984 1, DOI: ( / (84) )
Copyright © 1984 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions