| 摘要 |
An ultrasonic transducer is provided at the distal end of a sheath included in an inserting portion of an ultrasonic probe for performing ultrasonic diagnosis. The ultrasonic transducer can transmit and receive ultrasound through an acoustic window 38 facing against the ultrasonic transducer through an acoustic medium filled around the ultrasonic transducer. At least the acoustic window is formed of a resin including a mixture of polyamide block and polyether ester block copolymer resin and polyurethane. Thus, multiple reflection, for example, can be reduced in the vicinity of the acoustic windows. Furthermore, the sheath portion may be formed of the same resin. Thus, the sheath portion can be inserted through an endoscope channel, for example, smoothly with less buckling.
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