3D Cone beam CT (CBCT) projection backprojection FDK MLEM reconstruction MATLAB codes for students

3D Cone beam CT (CBCT) projection backprojection MLEM FDK reconstruction MATLAB source codes

Description

Hello,

My name is Kyung-Sang Kim.

This program is with respect to the mesh-grid based 3D cone-beam CT.

This is made for students who learn the medical imaging.

Please let me know if the program has problems.
(E-mail: kssigari@gmail)

Thank you

• Required Products: MATLAB
• MATLAB release: MATLAB 7.8 (R2009a)

[Kyung Sang Kim]

Hi, Masoud Hashemi,
This program is for flat detectors,
I think you should modify for the arc detector geometry,
Thanks for using my software.

[Masoud Hashemi]

I am wondering if the projection function is for Arc detectors (3rd Generation) or Flat detectors?

[Tai Chieh]

Great!

[ljpzgx]

The codes can run but the result is not very good,can you upload the referrences you refer for the codes,so tha we can understand clearly. Thank you！

[Kyung Sang Kim]

This program is similar to other programs but
much faster.

To accelerate speed,
(1) define the reconstruction object and projection images as a "single" precision,
and then (2) use "matlabpool".

[Kyung Sang Kim]

You can use "matlabpool",

From

for i=1:n (angle)
projection or backprojection
end

To

parfor i=1:n (angle)
projection or backprojection
!!please delete figure plot functions
end

This increases the performance more than twice in quad cores.

[Kyung Sang Kim]

Please change the function code "projection_pixel.m":

From

dist = (SAD+SDD)./sqrt((SAD+SDD)^2 + uu.^2 + vv.^2)*abs(ys(2)-ys(1));

To

dist = sqrt((SAD+SDD)^2 + uu.^2 + vv.^2)./(SAD+SDD)*abs(ys(2)-ys(1));

Thank you, :)