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IJPAP Vol.44(09) [September 2006] >

Title: Development of an experimental arrangement for precise measurement of angular distribution of ultrasound scattering
Authors: Saha, Ratan K
Roy, Manas K
Karmakar, Subhajit
Saha, Saibal
Sen, Swapan K
Keywords: Ultrasound scattering
Pulse-echo imaging
Issue Date: Sep-2006
Publisher: CSIR
IPC CodeA61N7/00
Abstract: This paper describes step-by-step development of a custom-made measurement system and also provides an assessment of the reliability of the set-up. The angular distribution of the scattered field generated by a sufficiently long cylindrical scatterer in water medium has been measured by this system. The measured values have been compared with the theoretical results to validate the instrument. The theoretical curves have been obtained by using the Faran’s theory [J Acoust Society of America, 23(4) (1951) 405]. In this study, an acoustic wave of frequency 2.19 MHz emitted by a medical ultrasound source has been employed to provide energy to the scattering object. Two steel wires of different gauges (0.68mm and 0.91mm in diameter) with size parameters k ≈ 3.12 and 4.17, respectively, have been taken as prototype scatterers. Here, k is the wave number of the incident wave and is the radius of the target. Our results show that the system is stable, capable of precise scattering measurements and measured values are reproducible. The system has also the flexibility of incorporating scatters of different shapes and also ultrasound probes of different frequencies.
Page(s): 661-669
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.44(09) [September 2006]

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