Patent ID: 8013604

Claim:
A method for improving the imaging quality of nuclear magnetic resonance imaging (MRI) equipment, comprising: presetting a corresponding relationship between a magnet temperature drifting trend of a magnet used for imaging by the MRI equipment and the cumulative energy of gradient pulses, and presetting a set temperature for the magnet; determining the temperature of the magnet to which the current value of the cumulative energy of the gradient pulses corresponds according to the current value of the cumulative energy of the gradient pulses and said preset corresponding relationship, and using said magnet temperature as a current predicted value of the magnet temperature; measuring a current temperature of the magnet as the current measured value of the magnet temperature; weighting the current predicted value and the current measured value of the magnet temperature with preset weight coefficients, so as to obtain an actual temperature of the magnet; and adjusting a proportional/integral/differential (DIP) parameter of a temperature control device according to the difference between the magnet's actual temperature and set temperature, so as to keep the temperature of the magnet constant.