how to sum all the frames in each dicom image and all the dicom images to form the volume

an any one help me how to do this I has 72 dicom images in a folder each dicom image has 72 frames. I wanted to aggreagate all frames of all dicom images to form a volume c

projectdir = 'E:\SHIVA BACKUP\THYROID\P1\newcodes\data1\13002';
% y = length(projectdir);
y = 72;
Odd = zeros(128, 128, 1, 72, y, 'uint8');
Even = zeros(128, 128, 1, 72, y, 'uint8');
% Read the series of images.
for p=1:y
   thisfile = sprintf('IM_%d.dcm', p);
   filename = fullfile( projectdir, thisfile);
   imdata = dicomread(filename);
   imsize = size(imdata);
   if ~isequal( imsize, [128 128 1 72] )
     fprintf('file is unexpected size %s instead of [128 128 1 72], skipping "%s"\n', mat2str(imsize), filename);
   else

       Odd(:, :, :, :,p) = imdata;
      % Even(:, :, :, :, :,p+1)=imdata;
     end

    % end
  end

     figure();
  % Display the first image stack.

z=montage(Odd(:,:,:,:,1),[]);

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