Mr Superconducting Magnets Of The Magnetic Field Uniformity Study

With the bioengineering and radiology development, the MR/I application act one important role in radiology and diagnostics. Magnetic field homogeneities is the theory basic of big medical equipment-MR/I, which is also another important parameter of the MR except main magnetic field strength, and is also one important direction of electromagnetism study. High and stable magnetic homogeneities can improve the SNR of the MR images, at the same time which is also the only factor to achieve chemical saturation fat restrain PSD (pulse sequence)In this paper, on the basic of introducing the MR/I theory, the shape of the superconduct shimming coil used in the superconduct magnet, position and the relation between the current loaded into the shimming coil and their influence on the space, then measure the magnetic homogeneities of the spherical volume of given radius, analyze with limited factors and computer optimize.Mainly design one accurate, convenient and quick shimming methods with the MR/I theory and Fourier transform, and optimize with limited factors analysis and computer. And revise the math model according to the multiple experimentation result, then get the exact relation between the shimming current loaded into the shimming coil and the given point .