Keywords: Diffusion Acquisition, Spinal Cord, Metal Artifact, DTI, 3T
Motivation: The presence of metallic implants results in severe geometric distortion, limiting the ability of performing quantitative DTI measurement near the hardware.
Goal(s): Goal: develop an acquisition method to address metal artifact DTI on post-operative patients with metallic hardware.
Approach: A custom-built pulse sequence based on the combination of the reduced-Field-Of-View strategy and multi-shot EPI is suggested.
Results: : In-vivo and in-vitro results show that the proposed approach provides distortion-reduced and signal void at the level of the metal hardware compared to the standard method.
Impact: The ability of collecting reduced metal-artifact DTI maps around the hardware enables establishing imaging biomarkers to assess injury evolution and thoroughly evaluate microstructure changes after surgery.
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