Keywords: Data Processing, Image Reconstruction
Motivation: Analyzing diffusion MRI (dMRI) metrics across multiple sites is challenging due to variability between scanners.
Goal(s): To investigate whether unified reconstruction algorithms have an impact on the inter-scanner variability in diffusion MRI.
Approach: Vendor-provided dMRI sequence was used on two scanners (Siemens, GE), and two standard reconstruction algorithms were evaluated to assess their effects on the reproducibility of diffusion microstructure measures and tractography.
Results: Harmonizing dMRI reconstruction across vendors did not significantly reduce inter-scanner variability in tractography measures, including fiber counts, and tract volumetric overlap. But, the Split-GRAPPA method enhanced the reproducibility of fractional anisotropy (FA).
Impact: This study shows that inter-scanner variability in diffusion MRI cannot be mitigated using a unified reconstruction algorithm if the acquisition sequences themselves are different. Prospective harmonization of dMRI may benefit more from harmonizing the sequence itself.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords