Horos is a free, open-source medical image viewer intended for use by radiologists, clinicians, and researchers. It is built on OsiriX (another famous DICOM viewer) but is completely free and community-driven.

Features precise tools for linear, area, and volumetric measurements, often used in planning and sizing for procedures like EVAR via resources like ResearchGate.

Horos is widely used in both clinical and research settings: Horos Project: Home Page

Horos is a free, open-source medical image viewer based on , a well-known DICOM (Digital Imaging and Communications in Medicine) viewer for macOS. Distributed under the GNU Lesser General Public License (LGPL) version 3.0, Horos offers a familiar interface and robust feature set without the high costs typically associated with proprietary medical imaging software.