[Rtk-users] The Reconstruction Result has blur-image its possible due to motion blur effect or not? how can reduce it or correct it ?

[Simon Rit]

Hi,
1) I don't think this is due to detector blur. It seems to be a geometric
problem. But it is hard to adjust it manually, this is generally calibrated.
2) I'm not sure I understand what your mean by "parallel to the source" as
the source is assumed to be a point. If you only change SID, SDD, the 2
source and detector X/Y offsets, the Gantry Angle and the in plane angle,
the detector is parallel to the rotation axis. The out of plane angle is
the angle between the axis and the detector.
Simon

On Fri, Feb 10, 2023 at 12:02 PM 何明哲 <m10512067 at yuntech.org.tw> wrote:

>
> Hi All
>
> I have use the CudaFDKConeBeamReconstructionFilter  algorithm to
> reconstruct a set of CBCT images,
> 1. )but I found that each slices contains blurry image area , because I
> was using a flat panel detector   , so I tried to adjust the source offset
> , inofplaneangle and outofplaneangle , but the blurry image area  still at
> there, could this be due to detector motion blur effect? Or is there a
> suggested way to correct it?
>
> 2). From the reference http://www.openrtk.org/Doxygen/DocGeo3D.html I can
> know that adjusting the source offset and inofplaneangle / outofplaneangle
> can ensure that the detector remains parallel to the source, But how can I
> make sure that the Z-axis of the ISO, the detector and the source are also
> kept parallel at the same time, Can I achieve this by adjusting any
> parameters or using any method?
>
> The picture below is my result  for Question 1.
> [image: 圖片1.png]
>
> thanks for your reply,
> BR,
>
> 回覆轉寄
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