DESIGN AND PROTOTYPING OF AN ULTRASONIC PULSED DOPPLER SYSTEM FOR BLOOD FLOW VELOCITY MEASUREMENT

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HEMMATI NIMA; ABOLHASSANI MOHAMMAD JAVAD

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Seminar Paper

Paper Information

Seminar: IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING
Year:2004 | Issue:11

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Title

DESIGN AND PROTOTYPING OF AN ULTRASONIC PULSED DOPPLER SYSTEM FOR BLOOD FLOW VELOCITY MEASUREMENT

Author(s)

HEMMATI NIMA | ABOLHASSANI MOHAMMAD JAVAD

Keywords

ULTRASOUND

DOPPLER

FLOWMETERY

DISCRETE FOURIER TRANSFORM

2 DIMENSIONAL SPECTROGRAM

Abstract

THE GOAL OF THIS ARTICLE IS TO INTRODUCE A PULSED DOPPLER SYSTEM WHICH IS DESIGNED FOR VESSEL BLOOD VELOCITY MEASUREMENT AND FOR STENOSIS ASSESSMENT IN ARTERIES AND VEINS. AN ULTRASONIC DOPPLER DETECTOR IS USED TO MONITOR THE BLOOD FLOW, AND MEASURES THE BLOOD FLOW VELOCITY IN ARTERIES AND VEINS. THE MEASUREMENTS OF THE DOPPLER ULTRASOUND GIVE THE INFORMATION ABOUT THE PRESENCE OF STENOSIS AND OCCLUSIONS IN THE BLOOD VESSELS, MAINLY IN ARTERIES. THE STENOSIS AFFECT THE VELOCITY PROFILE AND BLOOD FLOW PRESSURE AND PRODUCES TURBULENCE. THE MEASUREMENT OF THE VELOCITY PROFILE, WHICH REPRESENTS FREQUENCY SHIFTS IN THE DOPPLER SPECTRUM, CAN BE USED TO DETERMINE THE DEGREE OF STENOSIS. WE CONSTRUCT HARDWARE OF THE PULSED DOPPLER SYSTEM WHICH IS CONNECTED TO A PC VIA A PCI A/D (ANALOG TO DIGITAL CONVERTER) CARD. THIS DEVICE USES A 2 MHZ ULTRASOUND TRANSDUCER. HARDWARE CONSIST OF MASTER OSCILLATOR, 2 MHZ MAIN AND QUADRATURE SIGNAL PRODUCER, TRANSMITTER, RECEIVER, RF AMPLIFIER, DEMODULATOR AND SAMPLING CIRCUITS. DATA ANALYSING AND SIGNAL DISPLAY ARE IMPLEMENTED BY A SPECIAL SOFTWARE WHICH IS WRITTEN IN VISUAL C++ LANGUAGE. TO TEST THE SYSTEM, A STRING DOPPLER PHANTOM WAS BUILT WHICH CAN ALSO BE USED FOR QUALITY CONTROL OF OTHER CLINICAL DOPPLER SYSTEMS.

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APA: Copy

HEMMATI, NIMA, & ABOLHASSANI, MOHAMMAD JAVAD. (2004). DESIGN AND PROTOTYPING OF AN ULTRASONIC PULSED DOPPLER SYSTEM FOR BLOOD FLOW VELOCITY MEASUREMENT. IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. SID. https://sid.ir/paper/906366/en

Vancouver: Copy

HEMMATI NIMA, ABOLHASSANI MOHAMMAD JAVAD. DESIGN AND PROTOTYPING OF AN ULTRASONIC PULSED DOPPLER SYSTEM FOR BLOOD FLOW VELOCITY MEASUREMENT. 2004. Available from: https://sid.ir/paper/906366/en

IEEE: Copy

NIMA HEMMATI, and MOHAMMAD JAVAD ABOLHASSANI, “DESIGN AND PROTOTYPING OF AN ULTRASONIC PULSED DOPPLER SYSTEM FOR BLOOD FLOW VELOCITY MEASUREMENT,” presented at the IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. 2004, [Online]. Available: https://sid.ir/paper/906366/en

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