The invention relates to multi-b-value DWI image assessment in magnetic resonance, and aims to provide a multi-b-value DWI image assessment method based on differentiable manifold. The multi-b-value DWI image assessment method based on differentiable manifold includes steps: detecting an MRI image, and performing scanning to obtain a multi-b-value DWI image; preprocessing the image; and calculating a GDC. According to the method, a tumor is regarded as a hypersurface, the assumption of the type of signal intensity attenuation in advance is not needed, and therefore, the calculation is simpler, and the variation between tissues can be more visually reflected.
Multi-b-value DWI image assessment method based on differentiable manifold