Phase offset determination in magnetic resonance imaging

A method for determining phase offsets in a complex-valued image acquired with a receiver coil at an echo time following an excitation by a transmitter coil in Magnetic Resonance Imaging, each pixel of said image representing a volume element of a 3-dimensional object, comprising:

• immobilising the object and acquiring a first image of the object at a predetermined first echo time, the first image being separated into a first magnitude image and a first phase image, and a second image of the object at a predetermined second echo time, the second image being separated into a second magnitude image and a second phase image, wherein a ratio between said first echo time and said second echo time is chosen to be n:(n+1), n being a positive integer;
• generating, pixel by pixel, a phase evolution image representing phase changes from the first phase image to the second phase image;
• and
• subtracting, pixel by pixel, an n-fold of the phase evolution image from the first phase image to obtain a phase offset image containing said phase offsets.