The Horos MD™ is an interactive image display and navigation software device for diagnosis of medical images. It provides both 2D and 3D image visualization tools for CT and MRI scans from different makes and models of image acquisition hardware. It does not produce any original medical images and does not contain controls for the direct operation of a diagnostic imaging system. Horos MD™ conforms to the DICOM standard to allow the sharing of medical images with other digital imaging systems such as PACS (Picture Archiving and Communication System). The Horos MD™ software device runs on the macOS X platform, taking advantage of its optimized 3D graphic capabilities, which are provided by the METAL framework developed and maintained by Apple Inc. The user interface of the software follows Apple's Human Interface Guidelines (HIG) in order to create a user interface that is intuitive and easy to use for users who are familiar with other Apple products. Typical users of this device are radiologists and clinicians who are familiar with 2D scan images.