Learn more about Orthanc.


Whole-Slide Imaging

October 22nd, 2016

The Orthanc project is delighted to announce that it now provides a reference, lightweight implementation of DICOM for whole-slide microscopic imaging (digital pathology).

Our implementation is made of three components: A command-line tool to convert digital pathology images into DICOM, an Orthanc plugin to display such images, and a command-line tool to export DICOM whole-slide images as standard hierarchical TIFF images.

To the best of our knowledge, this is the first free and open-source implementation of DICOM for whole-slide imaging. Check out the dedicated section about digital pathology on our homepage for more information!


Stone of Orthanc

October 14th, 2016

A new companion tool to Orthanc has just been released! This free and open-source tool is called the Stone of Orthanc. Just like a palantír, Stone is a means of seeing medical images in Orthanc servers.

More precisely, Stone of Orthanc is a lightweight, cross-platform C++ toolkit for the CPU-based rendering of medical images. It notably features support for MPR (multiplanar reconstruction of volume images), PET-CT fusion, and accurate physical world coordinates. Stone of Orthanc is similar in spirit to two other well-known toolkits:

  • Cornerstone by Chris Hafey, a client-side JavaScript toolkit to display medical images in Web browsers. However, contrarily to Cornerstone, Stone of Orthanc is written in C++, and can be embedded into native, heavyweight applications.
  • VTK by Kitware, a C++ toolkit for scientific visualization. However, contrarily to VTK that relies on graphics processing units (GPU), Stone of Orthanc is entirely focused on software-based rendering. Within Stone, 3D volumes are handled as sets of 2D slices.

Check out the dedicated section about Stone on our homepage for more information! We hope this new tool will contribute to the development of new, innovative, free and open-source applications for the viewing and analysis of medical images.


First Stable Release of Orthanc

December 16th, 2015

After four years of intensive development, we are very happy to announce the release of the first stable version of Orthanc (version 1.0.0).

Survey: Who Uses Orthanc?

July 31st, 2015

The Orthanc project is continuously growing. To support its development, we would love to hear which hospitals, universities, companies and organizations take advantage of Orthanc. Please let us know by sending a short mail!

To put weight on future grant applications for travels/hardware/servers/..., we wish to gather a list of institutions that use Orthanc for production, for quality assurance, or for R&D purpose. These institutions will be publicly listed on this Web site, in a separate "Orthanc Users" section.

If you wish to support Orthanc, please use the following pre-filled mail, ideally attaching your institution's official logo:

Answer survey »

Orthanc Celebrates its Third Birthday

July 20th, 2015

The Orthanc project is now three years old. The last year was exceptionally rich for this free and open-source project. It's time for a short survey!

Illustrations of Orthanc in Action

Februrary 2nd, 2015

Following our talk at FOSDEM 2015 about free and open-source software for medical imaging, discover some media illustrating Orthanc in action.

Orthanc Celebrates its Second Birthday

July 18th, 2014

The first public release of Orthanc was on July 19th, 2012. Today, we are ready to celebrate its second birthday! It is time for a brief review of the past year.

Orthanc to be Even More Open

June 19th, 2014 (updated on July 11th, 2014)

Orthanc 0.8.0 features the possibility for external developers to create and distribute plugins for Orthanc, thanks to the Orthanc Plugin SDK.