io.github.nroduit.Weasis
An open-source DICOM viewer for standalone and web use, built for medical image
visualization in PACS and DICOM workflows — from routine reading to AI-assisted
review and quantitative imaging. It is used by hospitals, health networks,
multicenter research trials, and patients.
General features:
- Open source under the EPL 2.0 or Apache 2.0 license
- Integrates with PACS, VNA, RIS, HIS, or EHR
- Desktop builds for Windows, macOS, and Linux; web launch via the <code>weasis://</code> protocol
- Responsive UI for high-DPI screens, with support for over 20 languages
- Server- and client-side configuration with multi-level overrides
- API for custom plug-ins; embeddable viewer for CD/DVD or portable media
- The <em>Dicomizer</em> module converts images, videos, PDFs, and STL meshes into DICOM
Connectivity and interoperability:
- Classic DIMSE: Query/Retrieve (C-FIND, C-GET, C-MOVE) and Store (C-STORE)
- DICOMweb (QIDO-RS, WADO-RS, STOW-RS) and WADO-URI for legacy PACS
- Authentication via Basic, OAuth 2.0, and OpenID Connect, working with Keycloak, Google Cloud Healthcare, or any OIDC provider
- Send to PACS or DICOMweb, or export locally as DICOMDIR ZIP, ISO with embedded viewer, or common image and video formats
Viewer features:
- Broad data-type support, including multi-frame, <em>Enhanced</em> CT/MR/US volumes, SR, PR, KOS, SEG, RT, ECG, and Parametric Map, with the common DICOM codecs
- Multi-monitor viewing with per-monitor calibration, HiDPI, and full-screen; customizable mouse and keyboard controls
- Advanced imaging: oblique MPR, MIP, 3D volume rendering with segmentation overlay, 4D/multi-phase splitting, and side-by-side comparison layouts
- Measurement and annotation, including length, area, angle (Cobb), pixel-region statistics, histograms, and SUV for PET/nuclear imaging
- Dedicated viewers for ECG waveforms, structured reports (SR), audio (AU), and radiotherapy (RT structure set, dose, DVH)
Latest reviews
Great viewer. Had a DICOM from my dentist on a USB drive and my daughter kept asking to see what was on it. Was able to download Weasis quickly and setup easily and look at the image.
Works wonderfully, imports dicoms very easily (just drag and drop the whole folder). The interface is pretty and intuitive and there's a LOT of options settings and features.
Best DICOM complete image viewer. Allow 3D reconstruction and MIP views. Serveral color contrast for magnetic resonance results. Better than others like Alianza ms, Aeskulap , Dicomscope, ...
Great DICOM viewer! This is what you use when you get a CT scan, MRI scan, or 3D X-ray from your doctor. Typically, your doctor or dentist will give you a USB drive with a *.dcm file (and a few others but all you need is the DCM file). It'll also include Windows software to view it. Good luck trying to get that Windows software to load on any Linux system as the DICOM software given is VERY buggy on just the Windows OS. Anyway, use this Weasis DICOM viewer instead. If you seem to be missing images, right-click on your thumbnail and select 'MPR' -> 'Open' to get all angles.