超音波診断装置

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专利权人:

日立アロカメディカル株式会社

发明人:

国田 正徳

申请号：

JP2008217734

公开号：

JP5325503B2

申请日:

2008.08.27

申请国别(地区):

JP

年份:

2013

代理人:

摘要：

To enhance extraction precision of a technique for extracting biological information from a target position using continuous waves subjected to digital modulation processing.

SOLUTION: When the repeating frequency of a pseudo-random signal is fp2 and integral clutter POWER becomes maximum at a depth of d. By changing the repeating frequency of the pseudo random signal into fp1 and the maximum component of integral clutter POWER moves in the depth direction deeper than the depth d. In other words and the maximum component of integral clutter POWER is displaced from a target position at the depth of d. By doing so and a Doppler signal is selectively extracted from the target position at the depth of d while circumventing an influence of the maximum component of integral clutter POWER. Alternatively and the maximum component of integral clutter POWER can be displaced from the target position at the depth of d by changing the repeating frequency of pseudo-random signal into fp3or fp4.

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