| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent unnecessary ultrasound from occurring by forming an inclined surface on a reflection portion in a closed vessel. <P>SOLUTION: In a short axis oscillating probe, a piezoelectric element group 2 arranged in a long axis direction and having an acoustic lens 6 on a surface for transmitting/receiving ultrasound is provided on a rotary holding base 1 stored in a closed vessel 3, ultrasound transmitted from and received on the surface for transmitting/receiving ultrasound of the piezoelectric element group 2 is scanned mechanically in a short axis direction by rotationally oscillating the rotary support base 1 in a short axis direction of the piezoelectric element group 2, and the closed vessel 3 is filled with liquid as an acoustic medium L. And, when unnecessary ultrasound traveling in the closed vessel 3 exceeding a range of the acoustic lens 6 is reflected on any of reflection portions in the closed vessel 3 after propagating in a space between a surface of the acoustic lens 6 and an inner peripheral surface 3c of the closed vessel 3 in the long axis direction or the short axis direction, the unnecessary ultrasound after the reflection is prevented from traveling in a direction of returning to the space between the surface of the acoustic lens 6 and the inner peripheral surface 3c of the closed vessel 3a by inclining a surface of the reflection portion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
