MOTION DETECTION IN CEST MAGNETIC RESONANCE IMAGING BASED ON Z-SPECTRUM ANALYSIS

摘要

The invention provides for a medical imaging system (100, 300) comprising a memory (110) for storing machine executable instructions (120). The medical imaging system further comprises a processor (104) for controlling the medical imaging system. Execution of the machine executable instructions causes the processor to: receive (200) magnetic resonance image data (122) acquired according to a CEST magnetic resonance imaging protocol, wherein the magnetic resonance image data comprises voxels, wherein each of the voxels comprises a measured Z-spectrum (500) for a set of saturation frequency offsets (502, 504, 504', 506, 506', 508, 510); assign (202) a motion likelihood map (126) to each voxel by comparing the measured Z-spectrum of each voxel to predetermined criteria; and reconstruct (204) a CEST magnetic resonance image (128) using the magnetic resonance image data and the motion likelihood map.