Ring artifact problem on CT image

2017 6 8
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更新时间：2017 6 8
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Dear all, I am doing parallel beam gamma CT. when I reconstruct the data (using iradon), there is a ring at the edge of the image. I think it makes image contrast become low. is there any code that can solve that? thank you :)

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KSSV
KSSV 2017-6-8
You should attach the image..so that people can help.
Bayu Azmi
Bayu Azmi 2017-6-8
Hallo KSSV thank you for reply,
this is the result.
KSSV
KSSV 2017-6-8
编辑：KSSV 2017-6-8
doc_caxis_. You may limit the color's using caxis. Limiting these colors, might highlight your center circle.

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KSSV
KSSV
2017-6-8

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