发明名称 |
Method controlling the focusing of an ultrasonic field and apparatus for performing said method |
摘要 |
The invention concerns a method for surveying the focal point (F, F') of a focussed ultrasonic field (8, 14) and an apparatus for carrying out the method. According to the invention an ultrasonic field (4, 12) produced by an ultrasonic transmitter (2) is measured at several sites in a plane in the path of the waves at the site of the imaging device (6). The values determined at these sites are compared with given reference values for which the position of the focus is known. In an advantageous device, one surface of the imaging device (6) is equipped with several piezoelectric transducers.
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申请公布号 |
US4725989(A) |
申请公布日期 |
1988.02.16 |
申请号 |
US19860940844 |
申请日期 |
1986.12.12 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
GRANZ, BERND;KRAEMMER, PETER;SACHS, BERTRAM |
分类号 |
A61B17/221;A61B17/22;G01H3/00;G10K11/26;H04R1/32;H04R17/00;H04R29/00;(IPC1-7):H04B17/00 |
主分类号 |
A61B17/221 |
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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