Question

Transcranial Doppler Ultrasound signals

I am using Transcranial Doppler Ultrasound signals (Embolic signals) for training and testing a detection system in my project. It is difficult to find these signals in my country. Can anyone offer advice?
Mar 19, 2012

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All Answers (5)

  • Mohammad Bagher Khodabakhshi · Amirkabir University of Technology
    Dear friend
    I wanted to work on TCD Embolic detection in my Msc thesis, but I couldnt find a data base. So I recorded my own signal from synthesized pahntom. I Think finally you need to record your own signal.
    regards
    May 16, 2012
  • Stefan Marinoiu · Centennial College
    Dear friends, Communication is very important so let’s try our best not
    to misspell words please.
    May 17, 2012
  • Charoenchai Lueang-on · Thammasat University
    Dear Mohammad,
    Thank you for your suggestion. I would like to work on TCD embolic signal detection in my thesis too.
    What technique do you use for your detection system?

    Best regards,
    Charoenchai
    May 18, 2012
  • Mohammad Bagher Khodabakhshi · Amirkabir University of Technology
    Dear Charoenchai
    I used Esaote Xvision machine which records Doppler RF signals. It was very important for me to introduce an embolic detection algorithm on radio frequency (RF) signals. You can make a circulatory phantom for recording. You can find other informations about RF signals and US Phantom here:

    [1] K.Ramanarine,D.K.Nassiri,P.R.Hoskins,A.J.Lubbers,Validation of a New Blood Momicking Fluid for Use in Doppler Flow Test Objects, Ultrasound in Med. & Biol Vol. 24, No. 3, pp. 451–459, 1998

    [2]M.G.A. Lipperts, L.D.C. Sauren, J.G. Maessen, A.P.G. Hoeks, W.H. Mess, “Quantification of Embolic Showers Using Radio-Frequency Based TCD Analysis”, Ultrasound in Medicine and Biology, Volume 35, Issue 3, March 2009, Pages 395-402

    [3] Mohammad Bagher Khodabakhshi,Hamid Behnam,Hoda Poorasad Mehrabany; “Ultrasound Radio Frequency Signal Simulation Considering Doppler Effect Using Linear Time Variant Model”, American Journal of Biomedical engineering: 2011; 1(1): 1-6
    May 19, 2012
  • Jakub Żmigrodzki · Warsaw University of Technology
    I believe that researches about detection of microembolic signals are highly advanced. For this reason only work which is verified in clinical conditions will be valuable. In clinical situation you can only compare yours method only with human experts (due to lack of the other reference method). Of course you can use some laboratory models, but in this case there is a question: how close is your model to in vivo situation? So I believe that for first tests artificial signals (for example generated in Matlab) should be enough, but for finale verification you should go to clinic.
    Sep 18, 2012

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