发明名称 |
ULTRASONIC HARMONIC IMAGING SYSTEM AND METHOD USING WAVEFORM PRE-DISTORTION |
摘要 |
Improvements to a method for imaging a target, which method including the steps of (a) transmitting ultrasonic energy at a fundamental frequency, (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency and (c) generating an image responsive to reflected energy at the harmonic, are provided. The transmitting step includes transmitting a waveform with a positive pulse spatially defined by first and second zero values. A positive peak amplitude of the positive pulse is a first distance from the first zero value that is less than half a second distance between said first and second zero values. Thus, the waveform includes a fundamental spectral component and a harmonic spectral component at the transducer. An attenuation normalized peak of the harmonic spectral component is reduced at a region spaced from the transducer as compared to the peak at a region adjacent to the transducer. A negative peak is also shifted or pre-distorted. Various pre-distortions of the waveform may compensate for propagation, scattering, or system non-linearities.
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申请公布号 |
WO9908600(A1) |
申请公布日期 |
1999.02.25 |
申请号 |
WO1998US16795 |
申请日期 |
1998.08.13 |
申请人 |
ACUSON CORPORATION |
发明人 |
BRADLEY, CHARLES, E.;HOLLEY, GREGORY, L.;NEWELL, LAURENCE, J.;HEDBERG, DAVID, J.;NAPOLITANO, DAVE |
分类号 |
G01S7/52;G01S15/89;(IPC1-7):A61B8/00 |
主分类号 |
G01S7/52 |
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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