| 摘要 |
Speckle artifact is reduced in medical ultrasound images by the use of orthogonal pulse sequences. Ultrasound energy is transmitted into a region of interest in a patient's body, and the transmitted ultrasound energy produces ultrasound echoes from the region of interest. In response to the ultrasound echoes, first and second coherent signals are acquired. The first and second coherent signals correspond to first and second pulse sequences, respectively, which are orthogonal or nearly orthogonal. The first and second coherent signals are combined to provide a composite image signal that is representative of the region of interest. The first and second coherent signals are preferably acquired by first and second matched filters, respectively. The transmitted ultrasound energy may include first and second sequences of ultrasound pulses that correspond to the first and second pulse sequences, respectively.
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