Weasis is a multipurpose standalone and web-based DICOM viewer with a highly modular architecture. It is a very popular clinical viewer used in healthcare by hospitals, health networks, multicenter research trials, and patients.

Weasis DICOM viewer is cross-platform, free/libre and open-source software (FLOSS), multi-language and allows a flexible integration to PACS, RIS, HIS or PHR. This multi-platform DICOM viewer runs on Windows, Linux, and Mac OS X. It allows high-quality renderings with high performance through the OpenCV library.

It has been designed to meet several expectations of clinical information systems and their future evolution regarding medical imaging: providing web-based access to radiological images, as well as covering a considerable number of DICOM types and offering multimedia capabilities.

Weasis can display the content of most DICOM files including multi-frame, enhanced, MPEG-2, MPEG-4, MIME Encapsulation, SR, PR, KOS, AU, RT and ECG. It has a high level of DICOM implementation.

FAQ

Why is the Weasis license Eclipse Public License?

The Eclipse Public License is an OSI approved license and a commercially friendly copyleft license.

EPL is more business-friendly about some patent retaliation and reverse engineering clauses than LGPL. With EPL, derivative work can be distributed in any license type: open-source, freeware, commercial… However, if you distribute Weasis with some modifications (changing existing source code of the open-source Weasis plug-ins), even if it is a free distribution, you are obligated to make your modifications available to others.

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

Yes, the Weasis portable version can be copied in DICOM CD-ROMs as a multi-platform stand-alone viewer with launchers for Mac OS X, Linux and Windows. The viewer requires that a Java Runtime Environment (JRE 8 or greater) be installed on the machine to run. If Java is not installed on Windows, a dialog will propose to install it from the Internet.

The viewer loads automatically images from DICOMDIR or from directories configured in “weasis/conf/config.properties (by default weasis.portable.dicom.directory=dicom,DICOM,IMAGES,images).

For burning studies with Weasis, and additionnal plugin must be activated. In the web distribution, add weasis-ext.war. In the portable distribution, 1) uncompress weasis-ext.war, 2) copy weasis-isowriter-x.x.x.jar into weasis-portable/weasis/, 3) replace the file conf/ext-config.properties, 4) edit ext-config.properties and modify ${weasis.codebase.ext.url} by ${weasis.codebase.url}