| 摘要 |
<p>A selected portion of tissue to be treated is imaged using a pulse-echo ultrasound imaging system. This system comprises an ultrasound transducer which is driven during imaging at physioligically tolerable power levels. Once the imaging system is positioned to image the tissue portion to be treated, the power at which the transducer is driven is increased to a physioligically intolerable level which is sufficient to thermally treat that tissue portion. Following scarring, the tissue portion is again imaged to determine the effectiveness of the treatment. The preferred embodiment apparatus comprises a transducer-lens system for focusing ultrasound onto a preselected focal area, an imaging means for displaying images constructed from the echoes of said ultrasound, and a pulser means selectively operable at physioligically tolerable or intolerable power levels to selectively image or to cause thermal treatment of tissue in the focal area. <IMAGE></p> |
