[Rtk-users] Geometry settings

[Guangming Zang]

Hi Simon,
Thanks for prompt reply.
Actually, i used one iteration in FDK reconstruction, and 20 iterations in
ADMMTV(5 conjugate gradient in each ADMM), which  is enough i think.
Now i am thinking maybe the problem is caused by geometry settings, and if
so, i really need your help:
In my own project, i use the "cone beam angle" and the "souce to isocenter
distance"(same as sid in RTK) to set the scene,please see the attached
geometry image.

To make the same geometry in RTK ,  if the Projection size is A(pls see the
attached image), and the detector length is B(i.e., the projection image
size is B). in RTK ,
i set the SDD=SDD*B/A, and SID=SID. i thought it is correct because the
reconstructed volume size and slice size are same with ground truth, but i
am really not sure it is right or not.(the projection image is .bmp files,i
do not know the dpi)

i do not know i described it clearly or not. if you need more information
,please let me know.
Really appreciated for the help.
Regards


*Guangming Zang (Alex)*
*King Abdullah University of Science and Technology(KAUST)*
*University of Chinese Academy of Sciences(UCAS)*

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