图2：T2序列轴位影像再次显示一个大的不均匀病变，位于筛窦（箭头）。病变的信号类似于灰质。

Figure 2: T2-weighted axial image once again demonstrates a large, heterogeneous lesion located in the ethmoidal sinus (arrow). The lesion is predominately isointense to grey matter.

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常规序列图在水平轴方向上的每个框中只包含一个类名，如图1所示。

A generic sequence diagram contains only a class name in each box along the horizontal axis, as seen in Figure 1.

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将视频序列进行时间轴一维小波变换，利用变换后的高频帧信息提取出初步的运动掩模图像；

The original motion mask image can be extracted from the high frequency frames which resulting from temporal decomposition of the original video sequence by wavelet transform.

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