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TAs: Süleyman Yasin Peker |
Topics covered:
Introduction to Verasonics Vantage 32LE Ultrasound Research System.
Introduction to ultrasound transducers.
Introduction to ultrasound imaging modes.
Real-time data acquisition using Verasonics.
Time-of-Flight measurement of common carotid artery (cca) using ultrasound and image processing.
Flow measurement and colour doppler Colour Doppler and Power Doppler imaging using ultrasound.
Experiment details:
Introduction
This experiment involves the use of the Verasonics Vantage 32LE, a sophisticated ultrasound research system, to explore various aspects of ultrasound imaging and data acquisition. Participants will gain hands-on experience with different ultrasound imaging modes, including A-Mode, B-Mode, Colour Doppler, and Power Doppler, while understanding the applications of linear array, curvilinear/convex, and phased array transducers. The experiment will also cover real-time data acquisition using the Verasonics system, focusing on measuring Time-of-Flight values for echoes and analyzing the power spectrum of ultrasound signals in Doppler mode. This comprehensive approach will provide a deeper understanding of both the technical and practical aspects of ultrasound technology.
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A variation of Colour Doppler available on most systems is a Power Doppler display. This mode ignores the directional information provided by Doppler shift and displays the total Doppler signal strength as shades of one colour (Figure 8). Whilst it does not display any data on flow direction, Power Doppler is a useful tool for examining low velocity blood flow and is more sensitive to flow than colour dopplerColour Doppler.
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Time-of-Flight Measurement
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Set up the Verasonics system for Colour Doppler imaging of the CCA.
Acquire Colour Doppler images, ensuring that the flow is visualized across the vessel.
Use Spectral Doppler to obtain a waveform of the blood flow velocity.
Measure key parameters from the Doppler waveform, such as peak systolic velocity (PSV) and end-diastolic velocity (EDV).
Analyze the flow patterns, and discuss potential clinical implications, such as identifying stenosis or other vascular conditions.
Report requirements:
The report for this part is expected to include:
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