Cerebral Angiography

Scrub real DSA runs, spin a labeled Circle of Willis, or fly through a real MRA vascular tree. Teaching data — not for diagnosis.

Real intracranial digital subtraction angiography (DSA): a catheter injects contrast and a rapid X-ray run watches it wash through the vessels — arterial → capillary → venous. Scrub the timing to follow the bolus.

Frame 1 / 14Arterial phase

DSA run — 44 real runs (last 6 labeled)

Timing — contrast phase

Speed

View

Drag to pan · scroll to zoom · scrub the slider to step through the run. Phase labels are an approximate guide.

Case — real patients & variants

View

Show segment labels

Slice (clip planes)

Slice X/Y/Z (1–3 planes) to cut into the vessel ring and see the deep connections.

Arteries of the Circle of Willis

Drag to rotate · scroll to zoom · click a vessel (or an artery in the legend) to highlight and name it. A real patient's Circle of Willis (TopCoW segmentation) — colours and labels are teaching aids.

Case — real patients

View

Slice (clip planes)

Real intracranial arterial trees, surface-meshed from full-resolution time-of-flight MRA (OpenNeuro ds003949, ADAM cohort, CC0). Drag to rotate · scroll to zoom · slice X/Y/Z to cut in. The clinically-segmented aneurysm is flagged in yellow.

Data & credits

2D DSA: real intracranial runs from the DIAS dataset (Zenodo, CC-BY-4.0), 44 runs, web-encoded; the last 6 are DIAS's labeled set — toggle Show vessel tree to overlay the expert vessel segmentation. MRA: real time-of-flight MR angiograms — a healthy volunteer from OpenNeuro ds003949 (ADAM challenge, CC0) and an intracranial-aneurysm case from OpenNeuro ds005096 (Royal Brisbane TOF-MRA, CC0; de Nys et al., Sci Data 2024) with its clinically-segmented aneurysm as the red overlay — downsampled, rendered with NiiVue (BSD-2). Circle of Willis: a real patient's Circle of Willis, surface-meshed from a TopCoW angiographic segmentation (Topology-Aware Anatomical Segmentation of the Circle of Willis, MICCAI 2023/2024, CC-BY-4.0) — a complete CoW with all 12 segments labelled and colour-coded by artery, rendered with three.js (MIT). Colours and labels are teaching aids. Not for diagnosis.