发明名称 |
Curved array of sequenced ultrasound transducers. |
摘要 |
<p>An array of ultrasound transducers for pulsed sector-scan operation includes a plurality of transducer elements disposed on an arc of a circle and oriented to emit and receive ultrasound radiation in the direction of the center of the arc. A group of adjacent transducers within the array is active for each ultrasound pulse. The position of the group in the array is incrementally shifted along the arc, one transducer at a time, to effect scanning. The inherent focussing affect of a curved group of transducers is compensated with time delays or a negative lens to provide a parallel, sector-scanned radiation beam. The array may be manufactured by cutting grooves (620) in a solid bar of piezoelectric ceramic (600), casting flexible matching windows (615) on the front surface of the grooved bar, bending the grooved bar around a mandrel (650) to separate individual transducer elements (630) from each other and casting a foam air cell (660) over the back of the elements to retain them in place.</p> |
申请公布号 |
EP0031614(A1) |
申请公布日期 |
1981.07.08 |
申请号 |
EP19800201181 |
申请日期 |
1980.12.09 |
申请人 |
NORTH AMERICAN PHILIPS CORPORATION |
发明人 |
PELL, JAMES W.;HANSEN, GERALD L. |
分类号 |
H04R17/00;A61B8/00;G10K11/02;G10K11/34;(IPC1-7):10K11/34;10K11/02 |
主分类号 |
H04R17/00 |
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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