| 摘要 |
An ultrasonic measuring apparatus and method operating as an ultrasonic echocardiograph and a doppler blood flow speed meter by creating numerous microbubbles as a contrast medium or reflector only in an intended blood vessel. The apparatus comprises an injector which injects into a vein of patient an agent which is a substance encapsulated in numerous microcapsules of several micrometer or less in diameter and distributed in a carrier liquid so that it produces microbubbles through the reaction with blood, and a shock wave transmitter which emits a shock wave with the dominant positive pressure from the body surface toward a specific blood vessel such as the root of the aorta so that only microcapsules in the specific blood vessel, among all dispersed in the whole body, are broken by the shock wave and the agent is released in the blood flow.
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