.. _osimis_webviewer:


Osimis Web Viewer plugin
========================

.. contents::

This plugin by Osimis extends Orthanc with a Web viewer of medical
images, with more advanced features than the basic :ref:`Orthanc Web
viewer plugin <webviewer>`. The Osimis plugin adds tools for
measuring, for viewing multiple series, and for split-pane.

Importantly, contrarily to the basic Orthanc Web viewer, **CE
marking** is available. By buying such a CE marking, this viewer can
be used for diagnostic purpose.

For general information, check out the `official homepage of the
plugin
<http://www.orthanc-server.com/static.php?page=osimis-web-viewer>`__.
Also `check out the source code
<https://bitbucket.org/osimis/osimis-webviewer-plugin>`__.


How to get it
-------------

The Osimis Web viewer is part of the `Windows installers
<https://www.orthanc-server.com/download-windows.php>`__.

For Linux users, you'll find it in the `osimis/orthanc <https://hub.docker.com/repository/docker/osimis/orthanc>`__ 
docker images or you can download the LSB binary `here <http://orthanc.osimis.io/lsb/plugin-osimis-webviewer/releases/1.3.1/libOsimisWebViewer.so>`__.

The compilation process is quite complex since it requires to build
first the frontend and then the backend.  All information can be found
in the `source code
<https://bitbucket.org/osimis/osimis-webviewer-plugin>`__.


Usage
-----

.. highlight:: json

On Windows, the plugin is enabled by default.

If you're using the ``osimis/orthanc`` docker image, you'll have
to define the WVB_ENABLED `environment variable <https://osimis.atlassian.net/wiki/spaces/OKB/pages/26738689/How+to+use+osimis+orthanc+Docker+images#Howtouseosimis/orthancDockerimages?-OsimisWebViewer>`__.
to ``true``

On Linux, the Osimis Web viewer will only work with LSB orthanc binaries
that can be downloaded from `here <https://lsb.orthanc-server.com/>`__ and
that will work with most recent Linux distros.

Once Orthanc is installed, you must change the :ref:`configuration file
<configuration>` to tell Orthanc where it can find the plugin: This is
done by properly modifying the ``Plugins`` option. You could for
instance use the following configuration file::

  {
    "Name" : "MyOrthanc",
    [...]
    "Plugins" : [
      "/home/user/xxx/Downloads/libOsimisWebViewer.so"
    ]
  }

.. highlight:: text

Orthanc must of course be restarted after the modification of its
configuration file. 

Once a :ref:`DICOM study <model-world>` is opened using Orthanc
Explorer, a yellow button entitled ``Osimis Web Viewer`` will show
up. It will open the Web viewer for that particular study.  See also
the demonstration video on `official homepage of the plugin
<https://www.orthanc-server.com/static.php?page=osimis-web-viewer>`__.

Advanced options
----------------

.. highlight:: json

The configuration of the Web viewer can be fine-tuned by adding some in
the `configuration file <https://bitbucket.org/osimis/osimis-webviewer-plugin/src/master/doc/default-configuration.json>`__.

FAQ
---

- **What video formats are supported by the Osimis Web Viewer ?**

  The set of codecs supported by the Osimis Viewer is an intersection of the sets of codecs supported by 
  the `DICOM standard <http://dicom.nema.org/medical/dicom/current/output/chtml/part05/PS3.5.html>`__ 
  and those supported by the `web browsers <https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats>`__.
  In short, this mostly comes down to just MPEG-4.
  
- **Where are the annotations stored ?**

  Annotations are stored in :ref:`metadata <metadata>`.  Note that annotation 
  storage is disabled by default and can be enabled by setting ``"AnnotationStorageEnabled": true``
  in the configuration file.

  

CE marking
----------

Legally, in Europe, the Osimis Web viewer can not be used for medical usage unless you
purchase the `CE marked version by Osimis <https://www.osimis.io/en/services.html>`__.  
If you're outside Europe, you should check your local regulation but it's most likely 
that you're not allowed to use it for medical usage as well.

Although the free and open source version of the Osimis Web viewer offers the same feature scope, 
CE marking requires a "supplier-end user" agreement in which the supplier guarantees that:

- the viewer has been tested for medical use against all possible patient risk,
- the end user receives regular updates on new features and bug fixes,
- the end user can be informed of any bug in the medical device.