| 摘要 |
In a preferred embodiment, the invention provides a plurality of spaced ultrasonic piezoelectric transducers, which may be so fixed to and around an afflicted area of a patient as to enable their sequential or interlaced excitation, whereby the afflicted area of the patient can be excited from different aspects, so that ultrasonic energy is not permitted to enter the body from any single point on a continuous-wave basis. Each transducer delivers its ultrasonic energy via a body of material having a wave impedance that substantially matches the wave impedance of human soft tissue, thereby avoiding or minimizing the annoyance of a mismatched entry into the patient's body. The net result is for the patient to derive the therapeutic benefits of a moving applicator, without any physical displacement of one with respect to any other of the plural spaced transducers. Various embodiments and an illustrative plurality of different excitation sequences are described.
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