Query and population DVH.

Once curation has done its work, the archive behaves like a dataset — and asking it questions is graphical. Compose filters, watch the cohort answer live, and read the dose story at full resolution.

Compose the question, no scripting

Filters stack on anything the governed database knows: cohort, technique, plan fields, and any dose, volume, or distance endpoint, including your custom metrics. The matching count updates as you compose, so an over-tight clause announces itself immediately instead of after a rerun. Exclusions are never silent: each clause reports the cases it alone excludes (bypass one and re-count without touching the saved definition), and the Catalog lists every cohort case the active filters set aside.

Population DVH, not thumbnails

The population DVH is a real aggregate: percentile bands and the cohort mean, computed server-side over the whole selection at full resolution. First-class geometry, not an artist's impression. Overlay selections to compare, and pull any individual case's curve under the band on demand.

Selection is everywhere at once

Charts, distributions, and the DVH share one selection: brush a region on a metric distribution and the same cases light up in every other view. The workflow is conversational (narrow, look, widen, look again) because each step costs seconds.