Configure dataset viewer for sample manifest

README.md

@@ -39,6 +39,18 @@ metadata/sha256_manifest.csv
 sample/cases/<case_id>/...
 ```
 
+## QC Manifest Fields
+
+The QC manifest uses `Q1`--`Q7` for the raw OpenBrain QC-7 values and
+`r1`--`r7` for the corresponding source-local percentile risk fields. Larger
+`r_k` values indicate higher risk relative to cases from the same OpenNeuro
+source dataset; they are not calibrated probabilities of segmentation
+correctness. `R` is the aggregate QC-7 risk score, and `tier` is the confidence
+tier derived from the fixed release operating points.
+
+The public sample manifest under `sample/sample_manifest.csv` follows the same
+QC field convention for the 64-case reviewer sample subset.
+
 ## Exclusions
 
 This release excludes cases with non-CC0 licenses, missing OpenNeuro provenance,