How to convert 3D to 4D images

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Hi all
I have image dicom as 3D as (attached). How to combine it all the slice to 4D?
anyone can help me?

Accepted Answer

Simon Chan
Simon Chan on 15 Feb 2022
Try thw following:
[filename,pathname]=uigetfile('*.dcm','Select Files', 'MultiSelect', 'on');
Nz = length(filename);
for k = 1: Nz
imagedata = dicomread(fullfile(pathname,filename{k}));
if k == 1
[Ny,Nx] = size(imagedata);
rawdata = zeros(Ny,Nx,Nz);
rawdata(:,:,k) = imagedata; % Convert to 3D
Dimage = permute(rawdata,[1 2 4 3]); % Convert to 4D

More Answers (1)

DGM on 15 Feb 2022
Edited: DGM on 15 Feb 2022
If you have a volumetric image represented in a 3D array and you want to slice it on dim 3 and arrange each slice into a frame in a 4D image, you can do
B = permute(A,[1 2 4 3]);
If you want to slice on another dimension, just rearrange the first,second, and fourth elements of that vector in the call to permute().
A concrete example:
dirname = 'ZubalPhantomDicom';
dicomlist = dir(fullfile(pwd,dirname,'*.dcm'));
imstack = cell(numel(dicomlist),1);
for cnt = 1:numel(dicomlist)
imstack{cnt} = dicomread(fullfile(pwd,dirname,dicomlist(cnt).name));
% the image is currently a cell array of pages
% say we arrange the pages on dim3
imstack3 = cat(3,imstack{:});
% let's say we want to arrange the pages on dim4 instead
imstack4 = cat(4,imstack{:});
% let's say we wanted to take imstack3 and turn it into imstack4
imstack34 = permute(imstack3,[1 2 4 3]);
  1 Comment
mohd akmal masud
mohd akmal masud on 15 Feb 2022
TQ Sir DGM and Simon Chan, Its work!!

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