Fast Phase Unwrapping Using Fourier Transform

Amir M. Abduljalil¹, Seongjin Choi¹, Michael Vincent Knopp¹, Petra Schmalbrock¹

Phase image extraction and unwrapping is explored using discrete Fourier transforms. The slow varying phase changes are filtered out using a convolution algorithm to reveal the phase changes due to the anatomy. The applied method is robust and an improvement in the contrast to noise ratio is observed when the noise in the images is masked out prior to starting the calculations.