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The Auto Positioning feature provides an alternate, streamlined and efficient workflow and safety checks for the CT technologist in setting up CT examinations of the initiation of the first scout scan. Auto Positioning acquires 3D spatial information of the individual patient on the table and combines it with information from the selected protocol to automatically calculate and visually display the scout's start and end locations. Concurrently it checks for proper patient orientation, determines the table height for optimum patient centering, and checks for potential contact between the patient and the gantry. Upon acceptance by the technologist the patient is automatically moved to the correct scout start location. Use of Auto Positioning is intended to provide consistent patient positioning for optimal image quality and automatic exposure control.

Auto Positioning is an optional feature developed for use with GE CT systems. The purpose of this feature is to provide both a streamlined workflow and enhanced quality and safety checks during the exam setup process up to the initiation of the first scout scan. Incorporation of this optional feature does not preclude the technologist from preforming the existing manual workflow on the CT system, if desired. Auto Positioning uses a fixed, ceiling mounted, off the shelf, 2D/3D video camera that is capable of determining distances to points in its field of view. It displays standard RGB video images on the CT system's existing gantry-mounted touchscreens. Information from the standard output of the camera, precise spatial information of the individual CT system's gantry and table installation geometry, and information contained in the user-selected protocol is used to determine the anatomical landmark location and the start and end locations for the scout scan(s). Information from the standard output of the camera, precise spatial information of the individual CT system's gantry and table installation geometry, and information contained in the userselected protocol is used to determine the anatomical landmark location and the start and end locations for the scout scan(s). Addition functionality of Auto Positioning includes performing safety checks for patient orientation and the potential for the patient to come into contact with the gantry while the patient is placed into the gantry and during scanning.

The GE Revolution ACT Computed Tomography X-ray system is intended to produce cross- sectional images of the body by computer reconstruction of x-ray transmission data taken at different angles and planes, for patients of all ages, including Axial, Cine, Helical. These images may be obtained either with or without contrast. This device may include signal analysis and display equipment, patient, and equipment supports, components and accessories. This device may include data and image processing to produce images in a variety of trans-axial and reformatted planes. Further the images can be post processed to produce additional imaging planes or analysis results. The GE Revolution ACT CT Scanner System is indicated for head, whole body and vascular X-ray Computed Tomography applications. The device output is a valuable medical tool for the diagnosis of disease, trauma, or abnormality and for planning, guiding and monitoring therapy.

The multi-slice GE Revolution ACT CT scanner is currently commercially available and in clinical use in various other countries including the EU, Japan, China, and India. It is a general purpose, 16-slice (detector row) CT scanning system with a z-coverage of 20 mm and a maximum gantry rotation speed of 0.98 seconds. Revolution ACT is designed to help enable greater patient access to CT imaging in facilities that otherwise might not be able to obtain multi-slice CT technology with both current standard and advanced CT features and function. Revolution ACT uses the same technology, operating principles, features, and functions as the GE Optima CT520 predicate device (K123596) and other cleared GE CT scanners. The system consists of the gantry, patient table, operator console, power distribution unit (PDU), associated accessories, and software options. The Revolution ACT is also available in an 8-detector row (10 mm z-coveragre configuration (Revolution ACTs) using the identical (but depopulated) detector/DAS. The changes from the predicate device do not affect the intended use or patient population. Becaues the Revolution ACT does not support cardiac or other gated acquisitions, and has a slower rotation time thatn the predicate device, its indications for use were modified by removing cardiac and gated acquisitions and cardiac applications.