how to convert 4D into 3D?

Dear all,

I have 4D images. Can get thru this link. ( https://drive.google.com/file/d/1qlj_6MIcjdN5a2eZXitvtD5dfGhSdt8t/view?usp=sharing ). https://drive.google.com/file/d/1qlj_6MIcjdN5a2eZXitvtD5dfGhSdt8t/view?usp=sharing

the name file is LiverTS399.mat

how to convert it into 3D?

I tried use this command, but still 4D in workspace

load('LiverTS399.mat')
split = squeeze(cropVol);

Answer 1

[Walter Roberson]

split = reshape(cropVol, size(cropVol,1), size(cropVol,2), size(cropVol,3)*size(cropVol,4));

This would give you a 3D volume in which the 4th dimension has been spread out onto the third dimension.

or perhaps you want

split = squeeze(num2cell(cropVol, [1 2 3]));

This would give you a cell array in which each element was a 3D slice.

[mohd akmal masud]

this is correct

split = reshape(cropVol, size(cropVol,1), size(cropVol,2), size(cropVol,3)*size(cropVol,4));

thank you so much @Walter Roberson

but the real size is [184 192 152] but I got is [184 192 608]

I try use this one but got Error

split = reshape(cropVol, size(cropVol,1), size(cropVol,2), size(cropVol,3));

Error using reshape
Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that
dimension.

Answer 2

[Matt J]

If you mean you want the i-th 3D frame of the 4D data, then,

frame_i=cropVol(:,:,i)

[mohd akmal masud]

thank you @Matt J

I use

frame_i=cropVol(:,:,:,4)

then give what I want