rescale for making isotropic voxels

Hello all,

Can I make an isotropic 336*512 matrix? my teacher says i can add zero pixels to 336 but i want to expand method to 336*512*112 matrix and make an isotropic voxels.

Thanks in advance

Answer 1

[Image Analyst]

How to make a 2D isotropic matrix:

m = value * ones(336,512);  % You pick what you want "value" to be.

How to add zero pixels (i.e. nothing to add at all) to 336:

336

How to make a 3D isotropic matrix:

m3D = value * ones(336,512,112);  % You pick what you want "value" to be.

[Walter Roberson]

m3D = repmat(value, [336, 512, 112]);

[Muhammad Jawaid]

Image Analyst, I would like to ask for another example. I have got a CTA volume (Dicom) with size 512*512*304 & I want to make it isotropic volume having axial image size (256,256). can you please help me out.. For your information, pixel spacing is 0.4004 where as distance between slices is 0.45. Thanks alot

[Image Analyst]

Use this:

m3D = CTAImage(1:2:end, 1:2:end, :);

For spatial calibration, see attached demo.

[Stelios Fanourakis]

@ImageAnalyst: What number this value can be

[Image Analyst]

I don't understand your question. So I guess I'll just say 7.

[Stelios Fanourakis]

7 is an optimization value for value?

[Image Analyst]

With the lack of any information on what you're looking for or how it relates to my last comment on spatial calibration, sure, why not? If you don't like that, how about 13 or 42? Use whatever value works best for you.