| 摘要 |
A method for phased-array ultrasonic transmission into a body wherein transmission from each element of the phased-array is implemented according to a firing order designed to generate a summated ultrasonic signal apparently originating from a virtual source outside of the body. The timing and order of firing of the phased-array elements is calculated from the relative proximities of each of the elements to the desired virtual source. The method allows for instantaneous ultrasonic localization of rapidly moving targets such as coronary thromboses.
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