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Horos

Free, open-source medical image viewer for macOS

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Horos is a free, open-source medical image viewer for macOS. The project's stated goal is to develop a fully functional 64-bit medical image viewer for Mac OS X, built on OsiriX and other open-source medical imaging libraries. The software is licensed under the GNU Lesser General Public License, Version 3 (LGPL-3.0). The Horos Project describes itself as a community endeavor, with Purview serving as chief sponsor and providing technical support. The project reports more than one million downloads across hundreds of countries.

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