Abstract
An alternative approach to echographic breast imaging can be found in computerized transaxial tomography which can provide quantitative cross sectional images for various bulk acoustic parameters pertaining to the tissue. The first ultrasonic tomograms have been recorded in-vitro by Greenleaf et al. (1) and laterly in-vivo (2). In order to eliminate mechanical scanning effects in tomographic data recordings, an immobile 360° ring array has been proposed (3,4). The system architecture for electronic steering and scanning such an array has been described adopting “constant-K” mode of scanning (5). In this paper, we report the manufacturing technique for a 450 element toroidal ring array which has been built, as well as its experimental acoustic properties. We will also compare the ray displacement effects, due to refraction at a breast interface, for both a ring and linear array.
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References
Greenleaf, J.F., Johnson, S.A., Samayoa, W.F. and Duck, F.A. (1975): Alg. reconstruction of spatial distributions of acoustic velocities in tissues from their time-of-flight profiles. In: Acoustical Imaging, Vol. 6, 71–90. Ed. N. Booth, Plenum Press, New York.
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Clément, M.J-M., Alais, P. and Perrin, J. (1979): Ultrasonic computed tomography by electronic scanning of an annular array. Proc. Ultrasonics Int. 79, 511–517 (Graz).
Clément, M.J-M., Alais, P., Roucayrol, J-C. and Perrin, J. (1982): Computerized ultrasonic tomography by electronic scanning and steering of a ring array. In: Acoustical Imaging, Vol. 10, Ed. P. Alais and A. Metherell, Plenum Press, New York, pp. 397–413.
Clément, M.J-M. and Alais, P. (1981): An electronically steered and scanned 450 elements ring array for transaxial ultrasonic tomography in breast imaging. Ultrasonics International 81, Brighton (U.K.), 2–5 july 1981 (Abstract).
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© 1982 Martinus Nijhoff Publishers, The Hague, Boston, London
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Clément, M.JM., Perrin, J. (1982). Ultrasonic Quantitative Imaging with a Ring Array for Breast Examination. In: Thijssen, J.M., Nicholas, D. (eds) Ultrasonic Tissue Characterization. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7666-5_4
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DOI: https://doi.org/10.1007/978-94-009-7666-5_4
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-009-7668-9
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