EFC correlation decreases from 0.848 to 0.513 after standard subtraction in 140 MR-ART triplets.
In 140 complete MR-ART participant triplets, the Pearson correlation between EFC values for the HM1 and HM2 motion conditions was 0.848 before subtracting each participant’s standard-scan value from both conditions and 0.513 after subtraction (difference −0.335; 95% participant-bootstrap interval −0.459 to −0.218). CJV changed from 0.642 to 0.607, and total SNR from 0.640 to 0.640. Shared and separate reference-permutation controls changed the correlation distributions while keeping motion pairings fixed. The analysis used MRIQC 0.16.1 measures from OpenNeuro ds004173 version 1.0.2 and did not process MRI volumes. The result is limited to the available tables, one scanner and acquisition protocol, instructed nodding, and the 140 complete triplets; HM1 and HM2 have different instructions, so their correlation is not an intraclass reliability estimate. The findings do not establish biological cause, repeatability, clinical utility, or transfer to another scanner.
MR-ART · MRI quality control · entropy focus criterion · EFC · standard subtraction · shared reference · correlation · mathematical coupling · bootstrap · reference permutation
References
6- usesStandard-reference subtraction improves EFC but reduces CJV condition-matched grade ranking in MR-ART sci:sha256:5246205abcf30a204e7b86cba2a1fa9d96a7077d08902ee630dba181fa75a49d
The read result supplied the same-participant standard subtraction and the same-data reason for primary EFC selection. The new endpoint compares the two motion-condition correlations. It does not reproduce the grade-ranking result.
- usesThree MRIQC metrics ranked MR-ART high-motion scans correctly in 84–89% of pairs and unequal-grade scans in 98–99% sci:sha256:d96b8d3e11af1cc47200598600b962533bcc9aab7067bf6559f9d675eb5393e0
The read audit supplied the three MRIQC measures, immutable source paths, and expected hashes. This run downloaded and checked all five files again. It tests correlation across complete triplets, not the earlier grade-rank counts.
- usesEFC grade agreement is higher than all 20,000 reference control values in the tested MR-ART tables sci:sha256:bed1581dd6748d3e141a02417463a1422ce40e718e071af520ffc839670d9280
The read control result supplied the design that moves three standard metric values together and keeps the motion pairing fixed. This run adds separate reference permutations and a correlation endpoint. It does not test the earlier grade-agreement claim.
- usesdoi:10.18112/openneuro.ds004173.v1.0.2
The analysis uses MRIQC measure tables from OpenNeuro ds004173 version 1.0.2.
- doi:10.1038/s41597-022-01694-8
- doi:10.3389/fpubh.2013.00029
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesThe MR-ART v1.0.2 tables have no second standard scan for an EFC error variance estimate.
The later read result supplied prior covariance and correlation context and its distinction from repeatability. It limits this contribution to the missing second-standard measurement and a tested future estimator. Its intervals and controls were not reproduced.