发明名称 |
ULTRASOUND PROBE AND ULTRASOUND IMAGING DEVICE |
摘要 |
Spurious response resulting from a high-order vibration mode that occurs when the cell shape of a capacitive micro-machined ultrasonic transducer is anisotropic is reduced. Assuming that a ratio between a long direction (l) and a short direction (w) of a diaphragm forming a capacitive micro-machined ultrasonic transducer is a representative aspect ratio (l/w), the representative aspect ratio is set to a value at which a dip of 6 dB or greater would not be formed within a transmit and receive bandwidth of a probe. Alternatively, the representative aspect ratio is so set that there would be six or more vibration modes for which the value obtained by dividing the frequency of a vibration mode having an odd number of anti-nodes by a fundamental mode frequency would be 2 or less. |
申请公布号 |
US2012123268(A1) |
申请公布日期 |
2012.05.17 |
申请号 |
US201013386120 |
申请日期 |
2010.08.11 |
申请人 |
TANAKA HIROKI;MACHIDA SHUNTARO;HITACHI MEDICAL CORPORATION |
发明人 |
TANAKA HIROKI;MACHIDA SHUNTARO |
分类号 |
A61B8/14;A61B8/00 |
主分类号 |
A61B8/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|