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    • 2. 发明授权
    • Contrast agent imaging with destruction pulses in diagnostic medical ultrasound
    • 在诊断医学超声中具有破坏脉冲的造影剂成像
    • US06340348B1
    • 2002-01-22
    • US09348246
    • 1999-07-02
    • Sriram KrishnanGregory L. HolleyEdward A. GardnerSamuel H. Maslak
    • Sriram KrishnanGregory L. HolleyEdward A. GardnerSamuel H. Maslak
    • A61B800
    • A61B8/481A61B8/543A61B17/22004A61B2017/22008
    • The invention is directed to improvements in diagnostic medical ultrasound contrast agent imaging. In a preferred embodiment, high pulse repetition frequency (HPRF) destruction pulses are fired at a rate higher than necessary for receiving returning echoes. Pulse parameters can also be changed between the plurality of contrast agent-destroying pulses. Other preferred embodiments of the invention are directed to simultaneous transmission of multiple beams of destruction pulses. Destruction frames that consist of a plurality of destruction pulses can be triggered and swept over the entire region of tissue being imaged and at a variety of focal depths from the transmitter. The destruction frames are fired at some time triggered from a timer or some fixed part of a physiological signal, such as an ECG signal. Other preferred embodiments of the invention are directed to continuous low power imaging pulses alternating with destruction pulses triggered at a fixed point of a physiological signal, and a comparison of the received signals from imaging pulses fired before and after the destruction pulses. Alternatively, destruction pulses are triggered at a fixed point on a physiological signal different from the fixed point of a physiological signal used to trigger imaging pulses. In another embodiment, triggered destruction frames are used to enable a comparison of imaging frames in order to determine physiological functions, such as perfusion of blood in cardiac tissue. Finally, in another embodiment, destruction pulses are combined with subharmonic imaging.
    • 本发明涉及诊断医学超声造影剂成像的改进。 在优选实施例中,高脉冲重复频率(HPRF)破坏脉冲以高于接收返回回波所需的速率被发射。 也可以在多个造影剂破坏脉冲之间改变脉冲参数。 本发明的其它优选实施例涉及同时传输多束破坏脉冲。 由多个破坏脉冲组成的破坏帧可以被触发并扫过被成像的组织的整个区域并且在来自发射器的各种焦深处扫过。 在由定时器或生理信号的某些固定部分(例如ECG信号)触发的某个时间触发破坏帧。 本发明的其它优选实施例涉及与生理信号的固定点触发的破坏脉冲交替的连续低功率成像脉冲,以及在破坏脉冲之前和之后激发的成像脉冲的接收信号的比较。 或者,在与用于触发成像脉冲的生理信号的固定点不同的生理信号上的固定点触发销毁脉冲。 在另一个实施例中,触发的破坏帧用于使成像帧的比较能够确定生理功能,例如心脏组织中血液的灌注。 最后,在另一个实施例中,销毁脉冲与次谐波成像组合。