| 摘要 |
PURPOSE:To know accurate characteristics of an ultrasonic probe by providing a projection part which attenuates or scatters an ultrasonic wave reaching a flank of an ultrasonic wave reflector body to part of the flank of the ultrasonic wave reflector body which is opposite to a reflecting surface for the ultrasonic wave. CONSTITUTION:An ultrasonic reflector 2 consists of the spherical or cylindrical ultrasonic reflector body 6 and the projection part 7 which is fitted on the part other than the ultrasonic wave reflecting surface of the reflector body 6, e.g. on the opposite side from the reflecting surface in this example and attenuates or scatters the ultrasonic wave reaching the flank of the reflector body 6. When the frequency of the ultrasonic probe 5 is 20MHz, the ultrasonic reflector body 6 uses a stainless steel ball of, for example, 0.7mm in diameter and a hole is bored in this stainless steel ball to insert a support rod 3 into the hole, and the projection part 7 is fitted around the support rod 3 in contact with the ultrasonic reflector body 6 to such a size that the ultrasonic wave outputted by the ultrasonic probe 5 does not strike directly. |
