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Imaging medical

The requirements for medical ultrasonic imaging transducers are met with 1-3 PZT-rod/polymer-matrix piezoelectric composites. The composites provide high electromechanical coupling and low impedance properties superior to those of the conventional piezoceramics and piezopolymers. Also composite plates can be formed into complex shapes for beam focusing and steering. [Pg.252]

The key element in forming these pictures is the transducer that [Pg.252]

It must be an efficient electromechanical energy converter, i.e. the thickness mode electromechanical coupling coefficient should be as large as possible. [Pg.253]

It must efficiently couple acoustic energy into and out of the tissue, i.e. its acoustic impedance must be close to that of tissue (l.SMrayl). [Pg.253]

It must efficiently couple energy out of and into an electrical transmission line, i.e. the dielectric constant should be adjustable over a wide range from about 100 upwards. [Pg.253]


A. Rougee, K.M. Hanson, and D. Saint-Felix Comparison of 3D Tomographic Algorithms for Vascular Reconstruction. SPIE Vol. 914 Medical Imaging II, 1988, pp. 397-405. [Pg.120]

Altschuler M.D and Herman G. Fully three-dimensional image reconstruction using series expansion methods., A Review of Information Processing in Medical Imaging, Oak Ride National Lab., Oak Ride, TN, 1977, p.124-142. [Pg.219]

W.C. Chew and Y.M. Wang. Reconstruction of two-dimensional permittivity distribution using the distorted born iterative method. IEEE Transaetions on Medical Imaging, 9, 1990. [Pg.333]

SPIE Medical Imaging Conference Proeeedings, Volume 3032, pp 213-224 (1997)... [Pg.497]


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