数字视频广播(DVB)是欧洲170多个组织共同开发出的数字高清晰度电视标准，它主要由卫星广播(DVB - S)、地面广播(DVB - T)和有线电视(DVB - C)三部分组成。

DVB is the digital HDTV standard that developed by more than 170 organizations in Europe. It mainly comprises satellite (DVB-S), terrestrial (DVB-T) and cable (DVB-C) digital television systems.

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这节省了工作表空间，并改善了工作表的组织和清晰度。

This saves space on the worksheet and improves worksheet organization and clarity.

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目的：评价自然组织谐波成像(nth I)对显示颈动脉粥样硬化斑块结构清晰度的影响。

Purpose: To assess the efficacy of native tissue harmonic imaging (NTHI) in the delineation of carotid plaque.

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