|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.44 [2006] >
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
Ultrasound |
| Issue Date: | Sep-2006 |
| Publisher: | CSIR |
| IPC Code: | A61N7/00 |
| 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]
|
|
