| 发明名称 |
Extended focus transducer system |
| 摘要 |
An ultrasound multi-electrode transducer together with electrical control means in which a central circular section and at least one annular peripheral section are successively electrically connected during transmit and receive functions so as to provide an increased focal zone.
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| 申请公布号 |
US4398539(A) |
申请公布日期 |
1983.08.16 |
| 申请号 |
US19800164830 |
申请日期 |
1980.06.30 |
| 申请人 |
SECOND FOUNDATION |
发明人 |
PROUDIAN, ANDREW |
| 分类号 |
A61B8/00;G01N29/04;G01S7/523;G10K11/32;(IPC1-7):A61B10/00 |
主分类号 |
A61B8/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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