1. A method of determining a temperature distribution of a part of an object, arranged in a substantially uniform steady magnetic field, by means of magnetic resonance, which method comprises the following steps: excitation of spins in the part and measurement of MR signals, containing location-dependent information of the excited spins, by means of MR imaging pulse sequences, determination of a phase image of the part from the measured MR signals, determination of a temperature distribution of the part from phase differences between the values of pixels of the phase image and the values of corresponding pixels of a predetermined reference phase image, wherein the method also includes the following steps: excitation of spins in a first reference part of the object, a motion of which is related to a motion of the part, and measurement of a navigator signal by means of a first navigator pulse sequence, and determination of a shift in a measuring direction of the first navigator pulse sequence from the measured navigator signal and a predetermined reference so as to determine a correction for correcting the temperature distribution.