FAQs

Frequently Asked Questions

Table of Contents

What is Weasis?

Weasis is a standalone and web-based application designed for visualizing and analyzing images obtained from medical imaging equipment according to the DICOM standard. To learn more, visit the Weasis Medical Viewer page.

Where can I ask questions about Weasis?

For general questions, you can use the forum or the GitHub discussions.

On this website you should find help if you are:

Can Weasis be used for commercial purposes?

Weasis is available for commercial use, provided that you comply with the terms outlined in the license.

How to cite Weasis in a publication?

When citing Weasis in a publication, include the following details:

  • Author: Nicolas Roduit
  • Title: Weasis DICOM Viewer
  • Version: Mention the version of Weasis
  • URL: https://github.com/nroduit/Weasis
  • Access Date: Mention the date you accessed the URL

Citation Example: Roduit, N. Weasis DICOM viewer. Version 4.1.0. https://github.com/nroduit/Weasis (accessed 5 April 2023).

Why does Weasis use the Eclipse Public License?

The Eclipse Public License (EPL) is a commercially friendly open-source license approved by the Open Source Initiative (OSI). It offers several benefits, including:

  1. Business-friendly clauses: Compared to LGPL, EPL includes advantageous terms for patent retaliation and reverse engineering.
  2. Flexibility for derivative works: Plugins and other extensions to Weasis can be distributed under any license (e.g., open source, freeware, or commercial).
    However, modifications to the existing source code of Weasis plugins must be made available to others if distributed.

Since version 3.7.0, Weasis’ source code is distributed under a dual license mode: EPL-2.0 OR Apache-2.0. This allows users to choose the license that best suits their needs.

For more details, refer to the EPL 2.0 FAQ.

Can Weasis be included in DICOM CDs or other removable media?

Yes, Weasis can be embedded into DICOM CDs, but this feature is only supported on Windows platforms. On other platforms, creating a DICOM CD without the viewer is possible. Refer to the tutorial on DICOM Export CD/DVD Image for more details.

How do I enable Weasis logging?

To trace Weasis activities, enable the rolling log system in the application preferences. For more details on configuration, refer to the tutorial: How to configure and view log files.

Can I download DICOM files without a WADO server?

Yes, while a WADO server is recommended, downloading DICOM files without one is possible using the following methods:

  1. Building an XML Manifest File:
    Use the DirectDownloadFile and DirectDownloadThumbnail options as described in the integration guide.

  2. Using the $dicom:get Command:
    Example command:

    $dicom:get -r "http://external.server/images/MRIX_LUMBAR/img1.dcm http://external.server/images/img2.dcm"

    Note: This method is suitable for downloading only a limited number of files and should not be heavily relied upon.