| 摘要 |
A three-dimensional cavitation quantitative imaging method for distinguishing cavitation time-space distribution at microsecond level, the method comprising: after using a wide beam to detect a cavitation, an array transducer is moved by one unit position; after the cavitation-nucleus distribution is restored, and under the excitation of same cavitation energy, repeating cavitation detection using the wide beam to acquire original radio-frequency data of space-series two-dimensional cavitation of different unit positions; changing the cavitation source energy acting time, the time delay between energy source device excitation and the wide beam transmitted by the array transducer, and the time delay between a pulsating pump and the energy source device excitation to acquire the original radio-frequency of time-sequence two-dimensional cavitation, and combining minimum-variance self-adaptive beam synthesis of the wide beam, Nakagami parameter imaging and a three-dimensional reconstruction algorithm to acquire a cavitation three-dimensional time-space distribution image distinguished at microsecond level and a quantitative image of cavitation micro-bubble density, with a time resolution reaching microseconds. |
