发明名称 |
Ultrasonograph |
摘要 |
An ultrasonograph capable of generating a transmission beam having a uniform width over a wide range in an ultrasonic wave propagation direction is provided. A weighted mean value of a plurality of transmission delay time values corresponding to focal lengths of transmission pulse waves set in the ultrasonic wave propagation direction is calculated for each element constituting a transmission aperture and used as the delay time for the element when waves are transmitted. As the weight used for obtaining the weighted mean value, a transmission effective aperture width according to each transmission focal length is selected, and a weight in the direction of the transmit aperture realizing the width is calculated and is used in a focal length direction.
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申请公布号 |
US8167806(B2) |
申请公布日期 |
2012.05.01 |
申请号 |
US20070882895 |
申请日期 |
2007.08.07 |
申请人 |
UMEMURA SHIN-ICHIRO;MIWA YUICHI;AZUMA TAKASHI;SUGIYAMA TAKASHI;KURIBARA HIROSHI;HITACHI MEDICAL CORPORATION |
发明人 |
UMEMURA SHIN-ICHIRO;MIWA YUICHI;AZUMA TAKASHI;SUGIYAMA TAKASHI;KURIBARA HIROSHI |
分类号 |
A61B8/00;G01N29/26;G01S7/52;G10K11/34 |
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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