Ultrasound transducer array probe for intraluminal imaging catheter
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United States of America Patent
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Sep 7, 1999
Grant Date -
N/A
app pub date -
Oct 15, 1997
filing date -
Oct 15, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasound transducer array probe for intraluminal ultrasound imaging is situated on a distal end of a catheter. The probe has a flex circuit that accepts terminations from a plurality of coaxial cables admitted through the catheter, and electrically conveys these signals to integrated circuits and an ultrasound array acoustic stack, preferably having seventy-two elements. The circuit has more than one layer of metal tracings to support complicated electrical interconnections. The acoustic stack preferably includes two quarter-wave matching layers and an acoustic backing layer composed of urethane, AIN.sub.3, tungsten trioxide, and micro-balloons. The flex circuit can be formed of two sections that are joined during manufacture.
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