| 摘要 |
A flexible elongate device comprising a flexible elongate member having proximal and distal extremities, means mounted on the distal extremity and having a cavity therein, a transducer disposed in the cavity, support means for mounting the transducer so that energy omitted from the transducer is propagated in a forward direction, and oscillatory means connected to said support means for parting angular motion to the support means to repeatedly sweep that through an angle, said oscillatory means including at least one shape memory element and means for repeatedly energizing and deenergizing the shape memory element. |
