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公开(公告)号：JPH08229032A
公开(公告)日：1996-09-10
申请号：JP32522695
申请日：1995-11-21
Applicant: ADVANCED TECH LAB
Inventor： KIISU DABURIYUU JIYONSON , JIEFURII II PAWAAZU
Abstract: PROBLEM TO BE SOLVED: To realize transmission of highly focused ultrasonic beam by detecting an acoustic wave from a guide point where a coated microbubble which is made of suspension of contrasting agents and is having injected in a human body is distrusted by an ultrasonic pulse, processing the wave and compensating difference of ultrasonic velocity in the body of a patient which the wave passes through different body organs. SOLUTION: Suspension of contrastagent is injected in a human body, toward which an ultrasonic beam is beamed from an ultrasonic probe 10. The first pulse destroys coated microbubbles, then the second is transmitted comparably soon. The second sequence of echo signal is subtracted from the signal of first sequence in spatial standard by an inter-pulse differential sub-system 24. The result of substation is compared with the value of threshold given by a threshold circuit 26. The subtle variation of echo between the sequences received from tissues and liquids are dissolved, and only the signals generated from the destruction of microbubbles are left.
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