EFC grade agreement is higher than all 20,000 reference control values in the tested MR-ART tables
In public MR-ART MRI quality tables, participant-specific standard-scan subtraction produced higher entropy focus criterion (EFC) grade agreement than every value in two sets of 10,000 randomly reassigned reference controls. The own-reference condition mean was 0.828291, compared with control means of 0.666834 and 0.666885; its Monte Carlo p value was 1/10001 in each scheme and its Holm-adjusted value was 6/10001. The controls kept motion scans, grades, and conditions fixed, and moved each reference participant’s three metric values together. Coefficient of joint variation (CJV) and total signal-to-noise ratio (SNR) did not show a reference-pairing advantage. These results apply to the specified tables, one scanner and protocol, and the stated exchangeability assumptions. They do not establish biological cause, clinical threshold performance, scanner transfer, or population uncertainty. The analysis uses supplied MRIQC 0.16.1 outputs; it does not inspect MRI volumes or repeat image processing. All checks were done by one researcher, and the controls reuse the observations.
magnetic resonance imaging · image quality · MR-ART · MRIQC · entropy focus criterion · reference subtraction · permutation controls · grade agreement
References
4- Standard-reference subtraction improves EFC but reduces CJV condition-matched grade ranking in MR-ART sci:sha256:5246205abcf30a204e7b86cba2a1fa9d96a7077d08902ee630dba181fa75a49d
[Legacy relation: reproduces] This run used its grade-2/3 comparison, metric directions, source manifest, and expected point counts. Decimal arithmetic gives the same 12 raw and own-reference rank tables. This run does not repeat its bootstrap calculation or image processing.
- usesdoi:10.18112/openneuro.ds004173.v1.0.2
The analysis uses the MR-ART quality tables from the recorded OpenNeuro 1.0.2 source revision; the exact source files, commit, and SHA-256 hashes are preserved in the package.
- doi:10.1038/s41597-022-01694-8
- doi:10.1371/journal.pone.0301132
Cited by
5 publicationsPublic catalog entries on Sciscape.
- usesThe MR-ART v1.0.2 tables have no second standard scan for an EFC error variance estimate.
The read reference-assignment controls supplied the evidence for participant-pairing information and the stated need for repeated standards. This question specifies that missing acquisition test. No permutation result was recalculated.
- Two computer programs give the same 120,000 reference control counts for MR-ART v1.0.2.
[Legacy relation: reproduces] The new integer program uses the target source version, scan selection, score directions, reference schemes, seeds, and saved fixtures. It reproduces all 120,000 reference control counts and 12 raw or own-reference rows. It verifies full assignment file checksums and the specified numerical summaries.
- usesEFC correlation decreases from 0.848 to 0.513 after standard subtraction in 140 MR-ART triplets.
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.
- EFC grade agreement is higher than all controls in two MR-ART samples with 140 and 119 participants
[Legacy relation: reproduces] We used the source revision, EFC endpoint, reference schemes, seeds, and expected fixtures from this result. The new program gives the same 40,000 EFC condition counts, four EFC point rows, and both mapping file hashes. This relation covers EFC only. It does not cover the other two measures or image processing.
- usesStandard subtraction with calculated coefficients increases EFC pair agreement in the tested MR-ART tables.
This result uses the specified data revision, three metrics, score directions, grade-pair definition, and integer baseline counts. They enable direct comparison and arithmetic checks.