结论通过CT测量可以方便、精确地计算岩矢角的大小，对于头颅复杂部位的特殊摄影，提高耳部及岩骨等病变的影像诊断具有较高的价值。
Conclusion The PSA can be accurately calculated by CT measurement, it has very important value in the imaging diagnosis of ear and petrous bone diseases for the head radiography.
“在这个人们不得不呆在家里的特殊时刻，我可以通过这种方式和他们联系。”摄影师解释道。
"In this way, I could connect with them during this special time when people have to stay at home," the photographer explained.
因为水下摄影是一种特殊的艺术，所以只有较少的摄像师尝试着去创作。
Because underwater photography is a specialized art, relatively few photographers attempt it.
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