FFT of an Image

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David Dijemeni
David Dijemeni 2012-1-7
Is it possible to perform the FFT on an MRI image to show the dominant frequency at parts of the image?

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Wayne King
Wayne King 2012-1-7
An MRI image is already an image of 2-D Fourier magnitudes of the underlying K-space data.
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David Dijemeni
David Dijemeni 2012-1-7
Thanks for this info. I didnt actually know that. Please can u explain a bit more Wayne?
Wayne King
Wayne King 2012-1-7
Hi Esuabom, You can read a bit about it here:
http://en.wikipedia.org/wiki/Physics_of_magnetic_resonance_imaging#k-space
Look for k-space. The typical clinical image that you think of in MRI is a magnitude image, there are some uses for phase images in MRI, which you can research.

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Image Analyst
Image Analyst 2012-1-7
Why not just use FFT2 like usual? Go here for some demos by Steve:
http://blogs.mathworks.com/steve/category/fourier-transforms/

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