
OHIF Viewer
The industry-standard open-source medical imaging platform for web-based DICOM visualization and AI-assisted workflows.

The global standard in open-source 64-bit medical image visualization.

Horos is a high-performance, open-source 64-bit medical imaging viewer for macOS, built upon the established OsiriX framework. By 2026, it has maintained its status as the premier free alternative to enterprise-grade PACS workstations, widely utilized by radiologists, researchers, and veterinary practitioners globally. Its technical architecture leverages Apple's Cocoa framework and OpenGL for hardware-accelerated 3D rendering, enabling complex visualizations such as Multi-Planar Reconstruction (MPR), 3D Volume Rendering, and Maximum Intensity Projection (MIP). Horos distinguishes itself through a modular plugin architecture, allowing developers to extend its capabilities for specific clinical workflows or research needs. While the core software remains free under the LGPL license, it integrates seamlessly with Horos Cloud (powered by Purview) for cloud-based reporting, storage, and cross-institutional image sharing. As AI-driven diagnostics grow in 2026, Horos serves as a critical local validation node where clinicians can audit AI-generated segmentations and findings within a native DICOM environment, ensuring data integrity before final reporting.
Horos is a high-performance, open-source 64-bit medical imaging viewer for macOS, built upon the established OsiriX framework.
Explore all tools that specialize in 3d volume rendering. This domain focus ensures Horos delivers optimized results for this specific requirement.
Real-time reconstruction of 3D data into axial, sagittal, and coronal planes with adjustable slice thickness.
OpenGL-based volumetric visualization using ray-casting algorithms to display bone, tissue, and vascular structures.
Quantitative measurement tools for Region of Interest (ROI) calculating Mean, SD, and Area in Hounsfield units.
Comprehensive metadata scrubbing utility that removes PHI (Protected Health Information) while retaining clinical integrity.
Modular C++ and Objective-C framework allowing external developers to create custom tools.
Legacy-compatible media creation with integrated DICOM viewers for patient distribution.
Full utilization of system memory to load large-scale imaging datasets (e.g., 5000+ slice CT scans).
Download the latest DMG installer from horosproject.org.
Drag the Horos icon to your Applications folder and launch.
Configure local database storage location for indexing DICOM files.
Set up AET (Application Entity Title) and Port (usually 11112) for network listening.
Connect to remote PACS nodes by entering their IP, Port, and AET.
Import local studies via drag-and-drop or the 'Import' utility.
Verify 3D rendering capabilities by opening a CT or MRI study and launching 3D Viewer.
Configure anonymization templates for research exports.
Optionally install third-party plugins from the Horos repository.
Set up Horos Cloud credentials for off-site archiving and sharing.
All Set
Ready to go
Verified feedback from other users.
"Users praise Horos for its robust performance on Mac and the fact that it provides enterprise-level tools for free. Some note that technical support is community-driven unless paying for Purview."
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