Keywords: Diffusion Analysis & Visualization, Data Analysis
Motivation: QA in diffusion MRI is challenging and rarely implemented. We provide a new QA measure that is borrowed from fMRI.
Goal(s): To test a diffusion instability measure (DIM) on HARDI data from different scanners, with and without concurrent magnetic field monitoring (FM).
Approach: We estimate the correlation coefficient matrix between all pairs of diffusion directions across voxels inside the phantom and compute a QA measure from the eigenvalues of the matrix.
Results: DIM is sensitive to data quality affected by b-values, TE, acquisition/reconstruction types. Data acquired with FM showed a DIM value that was, on average, 10 times smaller than those without FM.
Impact: We developed and tested a diffusion instability measure (DIM) that is sensitive to factors affecting image quality, such as magnetic field monitoring, f0 stabilization, TE, gradient strengths, making it a promising tool for routine diffusion MRI quality assurance.
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