Horos
Free, open source medical image viewer.
Overview
The Horos Project is a free and open-source medical image viewer for macOS. It is based on an earlier version of OsiriX and is maintained by a community of developers and users. It provides many of the same core functionalities, including DICOM viewing, MPR, and 3D volume/surface rendering. While not certified for clinical diagnosis, it is a very popular tool for academic, research, and educational purposes, and for clinicians to review images in a non-diagnostic setting.
✨ Key Features
- Free and open source (FOSS)
- Full-featured DICOM viewer
- 2D, 3D, and 4D visualization
- Plugin architecture for extending functionality
- Large and active user community
🎯 Key Differentiators
- Completely free and open source
- Large, active user and developer community
- Powerful features comparable to commercial viewers
Unique Value: Provides powerful, commercial-grade DICOM viewing and analysis tools at zero cost for macOS users, democratizing access to advanced medical imaging.
🎯 Use Cases (4)
✅ Best For
- Creating 3D models of anatomy for research
- Teaching residents how to read CT scans
- Pre-operative visualization (not planning)
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Primary diagnosis (not FDA/CE cleared)
- Surgical simulation or planning
- Users requiring dedicated, official support
🏆 Alternatives
Offers a completely free and highly capable alternative to expensive commercial viewers, with the trade-off being the lack of dedicated commercial support.
💻 Platforms
✅ Offline Mode Available
🔌 Integrations
🔒 Compliance & Security
💰 Pricing
Free tier: Full functionality, community support.
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