Medical imaging · Local-first · Open source · 2026

Your scans,
your machine.

An open-source, local-first DICOM workspace — think VS Code for medical imaging. Point it at a study folder and explore it instantly: no uploads, no account, no cloud. A viewer for patients, doctors, students, and researchers — never a diagnostic tool.

See what it does How it works
Features

A real workspace
for your imaging.

Drop in a folder

Recursively scans study folders — .dcm files, DICOMDIR, even extensionless exports — and organizes everything into a Patient → Study → Series hierarchy.

Stack viewer

Scroll through slices, adjust window/level, pan and zoom — GPU-rendered with Cornerstone3D, the engine behind serious web imaging tools.

Measurements

Length, angle, elliptical ROI, and probe tools — with your measurements persisted per study and exportable alongside your notes as JSON.

Personal notes

Keep annotations next to your studies — questions for your doctor, context for later. Notes, not findings: OpenScan never interprets anything.

100% local

Files are read in place and never leave your machine. No network requests, no telemetry, no account — the core viewer works with zero connectivity.

Never diagnostic

A hard product guardrail: OpenScan does not infer, rank, or suggest conditions — and never will. It's an explorer for your own data, not a medical device.

How it works

Open. Explore. Annotate.

01

Open a study folder

The CD your radiology lab handed you, a USB stick, a downloads folder — OpenScan finds every image inside, whatever it's named.

02

Explore the series

Browse the patient → study → series tree, scroll slices with the keyboard, and fine-tune window/level to actually see what's in the data.

03

Measure and note

Add measurements and personal annotations, then export them as JSON — everything stays on your machine, keyed to the study.

Tech stack

Native shell, web heart.

Tauri 2 Rust React TypeScript Vite Cornerstone3D dicom-parser Zustand Tailwind CSS

Landing in 2026, open source.

MIT-licensed desktop app with a browser fallback. Want early access when it ships?

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