Intravascular system, equipment and method are maintained at filling with being bound property and are provided. Intravascular imaging devices may include flexible elongate component, which includes that a chamber has proximal part and distal portions A kind of tachometer drive cable is arranged in inner cavity, so that ultrasonic transducer is coupled to the inner cavity that tachometer drive cable is located at distal portions It is maintained at being bound property of filling at least in the inner cavity of distal portions and around ultrasonic transducer, filler is easy to send and receive ultrasonic signal. A kind of manufacture intravascular imaging devices may include obtaining flexible elongate component, which includes an inner cavity Insertion tachometer drive cable enters inner cavity, and rotary ultrasonic converter is couple to the tachometer drive cable One kind facilitating insertion into filling transmission and receives ultrasonic signal to intracavitary so that filling is around rotary ultrasonic energy converter It is interior and fill the chamber.
