I have many questions in image reconstruction that well be very nice if u can answer me :) 1- why an FFT shift needs to be carried out on k-space before and after the iFFT is applied. What is the purpose of the FFT shift? 2- Where are low-frequency components located in k-space? 3-What happens if you only apply the FFT shift before, but not after performing the iFFT on the k-space
I have many questions in image reconstruction
that well be very nice if u can answer me :)
1- why an FFT shift needs to be carried out on k-space before and after the iFFT is applied. What is the purpose of the FFT shift?
2- Where are low-frequency components located in k-space?
3-What happens if you only apply the FFT shift before, but not after performing the iFFT on the k-space
1. for center the image(DC component) in the image space.
2. all k space
3. Then will have errors in the phase map of image