Applying Marching Cubes algorithm

In my project,I need to apply Marching Cubes Algorithm to my data.My data consists of 174 slices of CT scan of lung images.How can I apply it to marching cubes algorithm obtained from marchingcubes.

I tried the code below

dcmfiles = ReadAllFiles(folderPath, 'dcm');
dcmLength = length(dcmfiles);
 n=dcmLength ;
a={}; slices={}; 
for i = 1:n
     width = 1370;
    center = 700;
    low = center - round(width/2);
    high = center + round(width/2);
   a{i}= dicomread(dcmfiles{i});
slices{i} = (a{i}); 
end 
C = cat(3,slices{1:end}); 

[nX,nY,nZ] = size(C); 
[X,Y,Z] = meshgrid(1:nX,1:nY,1:nZ); 
[F,V,col] = MarchingCubes(X,Y,Z,C,4)

Please provide the correct code