can anyone tell me where is the error?? i have a 3d image 128x128x128 and i want to divide it into [64,64],[64,64],[64,64] i wonder if this code is correct??

because when i use cell2mat function to concatenate the submatrix conct=128x128x2??? i don't know exactly where is the problem??

if true
  % code
end
clc,clear,close all;
f=phantom3d(128);
theta=0:179;
C=mat2cell(f,[64,64],[64,64],[64,64]);
tic;
matlabpool(2)
   parfor i=1:8
      wx=C{i}; 
       g=radon(wx,theta);
       g=iradon(g,theta,size(C{i},1));
       C{i}=g;

     end

 conct=cell2mat(C);

matlabpool close 
Reconstruction_time=toc
end

[akram]

can anyone give me some help??