Measuring and testing – Vibration – By mechanical waves
Patent
1981-06-26
1984-04-03
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73626, 73644, 367150, 128660, G01N 2900
Patent
active
044400250
ABSTRACT:
An ultrasonic transducer array for arc scan imaging systems comprises a plurality of elongated piezoelectric transducers arranged successively to define a convexed energy radiating surface. A plano-concave acoustic diverging lens is attached to the convexed surface to diverge the acoustic energy transmitted from the transducers in an increased steering angle. The transducers are assembled on an impedance matching layer which defines the convexed radiating surface. The acoustic impedance of the diverging lens is substantially equal to the acoustic impedance of the human body, while the acoustic impedance of the impedance matching layer is greater than that of the human body.
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"Intra Operative Real Time Echocardiotomography by a Newly Developed `Convex` Shape Transducer"--S. Suzuki et al., Jul. 22-27, 1979; Second Meeting of WFUMB, The Fourth World Congress on Ultrasonics in Medicine; pp. 165, 166 and 170.
Fukukita Hiroshi
Fukumoto Akira
Hayakawa Yoshihiro
Irioka Kazuyoshi
Tachita Ryobun
Birmiel Howard A.
Matsushita Electric Industrial Company Limited
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