Optimizing ultrasound Doppler measurement precision: a comprehensive experimental approach
Corrigendum
DOI:
https://doi.org/10.54355/tbusphys/2.2.2024.0011Keywords:
ultrasonic, Doppler Effect, frequency shift, incidence angles, pump speedAbstract
Corrigendum Notice: A corrigendum has been issued for this article and is included at the end of this document. Referred to by: “A. Aidarbek “Optimizing ultrasound Doppler measurement precision: a comprehensive experimental approach”, tbusphys, vol. 2, no. 2, p. 0011, Apr. 2024. doi: 10.54355/tbusphys/2.2.2024.0011”.
Experimental studies were conducted utilizing advanced equipment comprising a generator, tubing system, pump module, sonographer, and PC. The generator serves as the central component connected by tubes to the pump, forming a closed circuit. A tee in the tubing set prevents Doppler fluid leakage, with the fluid poured through a special funnel into the circuit post-connection. The Doppler fluid is evenly mixed by shaking its bottle to enhance signal strength. The entire system is sealed. The centrifugal pump generates continuous flows; different power modes were tested for 30 minutes each, with frequency shifts measured at angles α=15°, 30°, and 60°. Pump disconnection from the power supply prevents liquid entry during tubing connection. The pump module housing includes ventilation holes. A 3 by 8 cm Doppler prism, treated with ultrasonic gel, was connected to the tubing to capture data. A sonographer emitting signals at 2 MHz, with a gain range of 10 to 40 dB, was utilized for sound spectra analysis. High-mode operation, 4 microseconds pulse duration, and a 32 microseconds receiver gate were set. The ultrasound apparatus dimensions were 230 x 236 x 168 mm, with a power consumption of 27 VA. Data visualization was facilitated by an LED panel, with adjustable acoustic signal volume. A USB interface enabled connection to a PC for ease of use and data analysis. Special software facilitated graph generation depicting frequency vs. time dependence measurements. Frequency analysis yielded average and maximum frequency values, with f-mean utilized to measure Doppler effect frequency shift.
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