MATLAB: Voxel Image intensity inCT images

abdominalctImage Processing Toolboxmedical imagevoxel

Hello, i have CT images and i want to get the Voxel Intensity at I(x,y,z), please ca any one explain to me how i can get this intensity. Thank you Lafi

Best Answer

The z value will be the slice number you want the gray level from. So it would be like

voxelValue = array3D(y, x, sliceNumber);

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MATLAB: What exactly represents a voxel after loading an image into an array/matrix

A voxel represents some attribute of your sample at a 3-D location. For example, it could be the radiographic density, or the signal from an MRI instrument, or the color of a fluorescent material, or whatever.

MATLAB: Convert 3d image to 2d images

Try something like this

[rows, columns, numberOfSlices] = size(image3d);
for slice = 1 : numberOfSlices
    thisSlice = image3d(:,:, slice);
    baseFileName = sprintf('Slice %d.png', slice);
    fullFileName = fullfile(folder, baseFileName);
    imwrite(thisSlice, fullFileName);
end

To get them back, use imread(). To tack onto a 3D image, use cat(3, image3d, thisSlice).

Best Answer

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MATLAB: What exactly represents a voxel after loading an image into an array/matrix

MATLAB: Convert 3d image to 2d images

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