| 摘要 |
An imaging system and an insonifier for detecting the position and orientation of devices adapted to produce intravascular ultrasonic images from a human body, especially from an artery. The system includes a catheter having a pair of transducers rotate about the axis of the catheter. One of the transducers is for transmitting ultrasound and the other is for receiving the transmitted sound. The insonifier includes a third transducer that transmits sound at a frequency that can be received by the transducer in the catheter and is operatively associated with the catheter to provide sound at the same frequency as the first transducer. The sonogram that is produced can be displayed on a CRT and is the product of image detected by receiver in the catheter. Both images are simultaneously displayed to form a composite which enables the user to determine the position and the orientation of the tip of the catheter.
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