Phase evolution. Left: Phase (radians) over k-space simulated on MATLAB for three different frequency-offsets (50 Hz, 150 Hz, and 250 Hz). The phases were calculated considering 0 radians at the centre of k-space and echo-time shifting. Right: Line signal profiles along the phase-encode direction for the 150 Hz offset. It is shown three line profiles, two for the two frequency-encode edges of k-space (red: kx=−215m−1, blue: kx= + 215m−1) and one for the centre (kx=0m−1).