EQUAL VOXEL MAGNETIC RESONANCE DIFFUSION IMAGING METHOD AND APPARATUS BASED ON MULTI-PLATE SIMULTANEOUS EXCITATION

摘要

An equal voxel magnetic resonance diffusion imaging method and apparatus (10) based on multi-plate simultaneous excitation. The method comprises the following steps: step S1: performing excitation on a target to be tested for many times by means of a multi-plate simultaneous excitation pulse, and in the process of each excitation, performing signal acquisition on the target to be tested by means of a multi-channel coil, thereby obtaining k space data acquired by means of down sampling in each excitation; step S2: by a multi-excitation diffusion imaging reconstruction algorithm uniting a k space and an image domain, recovering k space position data which is not acquired in each excitation; and S3, correcting an edge artifact by means of an improved NPEN algorithm, thereby obtaining an imaged image. According to the method, high-resolution images are acquired and a relatively high signal-to-noise ratio can still be kept at the same time; interference of three-dimensional navigation echo errors is reduced, quality and stability of reconstructed images are improved, and signal-to-noise ratio efficiency and scanning efficiency are improved on the basis of guaranteeing the quality of images.