By Julien Rouyer, Philippe Lasaygues, Serge Mensah (auth.), Andrzej Nowicki, Jerzy Litniewski, Tamara Kujawska (eds.)
The overseas Symposium on Acoustical Imaging is a distinct discussion board for complicated study, masking new applied sciences, advancements, tools and theories in all components of acoustics. This interdisciplinary Symposium has been occurring always considering the fact that 1968. throughout the years the court cases volumes within the Acoustical Imaging sequence became a reference for state of the art examine within the box. In 2011 the thirty first foreign Symposium on Acoustical Imaging used to be held in Warsaw, Poland, April 10-13. providing either a vast viewpoint at the state of the art in addition to in-depth study contributions by means of the experts within the box, this quantity 31 within the sequence comprises an outstanding number of papers in six significant different types:
Biological and scientific Imaging
Physics and arithmetic of Acoustical Imaging
Transducers and Arrays
Nondestructive evaluate and commercial Applications
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Extra info for Acoustical Imaging: Volume 31
Soc. Am. 99(5), 3212–3224 (1996) 4. : A time-efficient and accurate strain estimation concept for ultrasonic elastography using iterative phase zero estimation. IEEE TUFFC 46 (5), 1057–1067 (1999) 5. : Internal displacement and strain imaging using ultrasonic speckle tracking. IEEE TUFFC 41(3), 314–325 (1994) 6. : Phase-based ultrasonic deformation estimation. IEEE TUFFC 55(1), 94–111 (2008) 7. , Lu, J-y: Extended high-frame-rate imaging method with limited-diffraction beams. IEEE TUFFC 53(5), 880–899 (2006) 8.
Signal compensated from TGC is used for attenuation determination following spectral ratio method. The technique is based on a comparison of the amplitude spectra of the backscattered signals recorded before and after propagation through the defined section of the medium. The procedure starts by selecting echo signal attenuated in trabecular bone. This part must not be performed automatically because of differences in soft tissue and compact bone thickness and anatomical characteristic of bone shape.
1 General view of the ultrasonic tomograph Fig. 2 View of the antenna equipped with eight 1-MHz transducers and the 128-element 3-MHz array 36 P. Lasaygues et al. Fig. 3 Electronic setup (8 Â 128 Multiplexer) Fig. 4 Samples – femur and fibula – with an agar-gel shell 4 Results The validity of UCT was tested by using the scanner on real child bones. The sample was a fresh fibula from a 10-year old child containing no marrow in the inner cavity. The mean cross-section of the bone was 17 Æ 2 mm and that of the inner cavity was 6 Æ 2 mm.