| 摘要 |
<p>The present invention provides a medical ultrasonic imaging device with dynamic focusing that is capable of operating at high frequencies and providing high resolution. One embodiment of the device includes a plurality of transducers, arranged in either a linear or curved array (24), for converting an ultrasonic signal received by the device into a plurality of electrical signals. This embodiment of the device also includes a plurality of vector modulators (40, 48) for phase-shifting the plurality of electrical signals to achieve fine focusing. A delay line array (82) is further included in the device that allows each of the phase-shifted electrical signals to be delayed by a selected amount to achieve coarse focusing of the electrical signals. Further included in the device is a summer (92) of summing the time delayed and phase-shifted electrical signals to provide focused image data.</p> |
