请问Rutgers Univ.的这种面试是系里统一安排的还是教授自己感兴趣所以面试？

Email内容如下：

Dear [姓名],

Hope you are doing well.

I have reviewed your Phd application and would like to speak to you via skype, if you are interested. The interview should last about 30 minutes.

Please let me know of your availability at the following times:

[提供给我两个时间]

Look forward to hearing from you.

Best,

发邮件的老师并非是POI（我没套磁），而且我申请的方向是计算机视觉，和他的研究领域基本没啥交集。请问这种面试是院系统一安排的还是他自己对我感兴趣？（如果是后者我都不想面了）
如果是他对我感兴趣，是不是如果我拒了他的面试，其他教授也不会再看我的申请了？
谢谢！