| 摘要 |
<p>The invention is directed to improvements in diagnostic 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 (504). 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 (518). Other preferred embodiments of the invention are directed to continuous low power imaging pulses (806) alternating with destruction pulses (812) triggered at a fixed point of a physiological signal, and a comparison (510) of the received signals from imaging pulses fired before and after the destruction pulses.</p> |
