Method and system for improving contrast ratio of low-field magnetic resonance imaging

The invention provides a method and system for improving the contrast ratio of low-field magnetic resonance imaging, and belongs to the technical field of image processing, and the method comprises the steps: S1, collecting multi-contrast low-field magnetic resonance data which comprise a T1 weighted image and a T2 weighted image; s2, predicting according to the T1 weighted image and the T2 weighted image to obtain a T1 image, a T2 image and a proton density image; s3, contrast enhancement processing is carried out on the T1 image and the T2 image obtained through prediction, and the contrast of the proton density image is not changed; and S4, synthesizing the proton density map with the contrast-enhanced T1 map and the contrast-enhanced T2 map to obtain a corresponding contrast image. The method has the beneficial effects that the contrast of different tissues in the magnetic resonance image under low field intensity can be improved, so that the visual impression and diagnosis difficulty of the image are imp