结论：高质量的儿童CTVE图像依赖于扫描重建参数的合理选择、最佳的观察阈值及方位的选择，以及操作者的技巧和熟练程度。

Conclusion:A superior CTVE image depends on optimal selection of the scanning reconstruction parameters, display setting and threshold values, as well as the operator′s experience and skills.

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使用者原本可以依赖恒定不变的菜单来掌握在屏幕上的方位，菜单的改变彻底冲走了这种依赖感。

Users depend on the permanency of menus to help keep them oriented on the screen. Changing the menus bleeds away this reliability.

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方位依赖于用户如何持有该设备；

The orientation of the display depends on how the user is holding the device;

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