The 2016 QSM Challenge: Lessons learned and considerations for a future challenge design.

ABSTRACT:

Purpose

The 4th International Workshop on MRI Phase Contrast and QSM (2016, Graz, Austria) hosted the first QSM Challenge. A single-orientation gradient recalled echo acquisition was provided, along with COSMOS and the χ₃₃ STI component as ground truths. The submitted solutions differed more than expected depending on the error metric used for optimization and were generally over-regularized. This raised (unanswered) questions about the ground truths and the metrics utilized.

Methods

We investigated the influence of background field remnants by applying additional filters. We also estimated the anisotropic contributions from the STI tensor to the apparent susceptibility to amend the χ₃₃ ground truth and to investigate the impact on the reconstructions.

SUBMITTER: Milovic C 

PROVIDER: S-EPMC7526054 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature