ORIGINAL MATHEMATICS. NEW INTERFACE.

Atlas workspace.

Explore the original stereotactic constructions in a precise, interactive environment.

VIENNA, 1992–1999 REBUILT 2026

CONSTRUCTION PARAMETERS

Target structure

ANATOMICAL TARGET

Reference dimensions

Stereotactic reference line and thalamic height

AC–PC DISTANCE

THALAMIC HEIGHT

Display

Construction linesHistorical geometric guides Landmark labelsAC / FM and PC reference

Derived from the original Visual Basic CASA Classic source, not from a reconstructed atlas.

INTERACTIVE ATLAS / SAGITTAL PLANE

Corpus subthalamicum / STN

VECTOR RENDERING

CASA / SAGITTAL CONSTRUCTIONAC–PC REFERENCE

← POSTERIORANTERIOR →

SUPERIOR ↑ · INFERIOR ↓2D HISTORICAL MODEL

Export constructionVector quality · local processing

HISTORICAL UTILITY

Foramen of Monro estimator

Siegfried formula as implemented in CASA Classic. Distance from bregma to dorsum sellae.

BREGMA–DORSUM SELLAE

BREGMA–FORAMEN OF MONRO— mm

Original formula: BF = BD × 0.6874 · Siegfried, Neurochirurgie (1980), as cited in source

THE ARCHIVE, REIMAGINED

1995

An idea with a history.

François Alesch & W. Th. Koos. Computer-Assisted Multidimensional Atlas for Functional Stereotaxy. Acta Neurochirurgica 133:153–156.

CASA CLASSIC CASA NEXT BUILT FROM THE ORIGINAL

Research / historical prototype — not validated for clinical use. This build reproduces original 2D atlas constructions only. It is not surgical navigation software, does not independently localize patient anatomy, and must not be used to determine treatment coordinates.