How to make 3D model from 2D CAT Slices?

myFolder = uigetdir();
filePattern = fullfile(myFolder, '*.jpg'); 
theFiles = dir(filePattern); 
for k = 1 : length(theFiles) 
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, baseFileName);
    y = imread(fullFileName); 
    grayImage = rgb2gray(y); 
    
isaretleme(240:256, :) = repmat([1,0.5,0], [256-239, 1])

goruntu = imshow(grayImage); 
colormap(gca, isaretleme);
drawnow;

imwrite(grayImage,isaretleme, ['Çıktı/img' num2str(k+10) '.jpg'],'jpg');
end

winopen("Çıktı")
imds = imageDatastore(fullfile("Çıktı",'img*'));
montage(imds)

Im using this code to detect possible bone tissue in CAT Slices. I want to do 3d model for whole bone tissues from that slices. Im using JPGs. I dont know whats the height between slices too, but i can try to find the best. If its needed i can also upload the images Im using.

[KALYAN ACHARJYA]

"3D model from 2D CAT"

You have 2D images, do you want to stack or display in 3D? Any image for reference?

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I want to make .stl file from procesed images. So i want to stack together. I added the code and dataset. The slices have 2.5mm far from each other.

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No ideas?