FFT of an Image

Is it possible to perform the FFT on an MRI image to show the dominant frequency at parts of the image?

Answer 1

[Wayne King]

An MRI image is already an image of 2-D Fourier magnitudes of the underlying K-space data.

[David Dijemeni]

Thanks for this info. I didnt actually know that. Please can u explain a bit more Wayne?

[Wayne King]

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.

Answer 2

[Image Analyst]

Why not just use FFT2 like usual? Go here for some demos by Steve:

http://blogs.mathworks.com/steve/category/fourier-transforms/