We can consider that ultrasound image consists of lots of speckle pattern.
超声图像即可以看作是由若干散斑模式组成。
Objective to investigate the application of the high-frequency ultrasound in the axial pattern skin flap's preoperative design, and to understand the distribution of vessel in the axial pattern flaps.
目的探讨高频探头超声在轴型皮瓣移植术前设计中的应用价值，了解轴型皮瓣的血供分布情况。
Conclusion Ultrasound has a high value in evaluation of direction and wave pattern of portal vein flow, and has higher accuracy in detection of portal vein patency than ct.
结论超声可以对门静脉的血流方向和流速曲线作出准确评估，对门静脉的通畅性诊断价值优于CT。
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