[Gate-users] How to obtain a arc CTscanner instead of the original flat panel one?

[M. ZHU]

Dear experts:
  Recently, I want to generate a system of the arc detector based on the example of CTscanner (flat panel detector). Specially, I linearly repeated a pixel along the Y axis 36 times in one cluster and then annularly repeated the module around the Z axis 600 times in a range of 90 degrees. Now, the shape of CTscanner is already arc in  visualization. However, these is one pixel can be got to detect the photon. I will be very appreciative it if you can help me solve this question. Thank you very much and I am looking forward to your reply soon. My code and the error message are in the attachment.
The visualization of our arc CTscanner is like as follow:
  
  sincerely！


  Manman Zhu
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