16  Accuracy of Measurements.........................................................................................................89
16.1  Measure Distance for Axial, Helical, and Cine Images.......................................................89
16.2  Measure Distance for Scout Images.................................................................................. 89
16.3  Measure Angle................................................................................................................... 90
16.4  Voxel Dimensions...............................................................................................................91
16.5  ROI..................................................................................................................................... 91
16.6  CT Number......................................................................................................................... 91
16.6.1  CT Number Mean and Standard Deviation................................................................92
16.6.2  CT Number Accuracy................................................................................................ 92
16.7  Range, Precision and Accuracy of Displayed Values.........................................................92
17  Accessory Safety.........................................................................................................................93
17.1  Monitor Safety.................................................................................................................... 93
17.2  IV Pole Safety.....................................................................................................................93
17.3  Table Tray Safety............................................................................................................... 94
17.4  Systems With Metal-Free Cradles and Accessories.......................................................... 94
17.5  Power Injector Safety......................................................................................................... 94
17.6  Phantom Safety.................................................................................................................. 94
18  Maintenance and Cleaning..........................................................................................................95
19  Hazardous Substances............................................................................................................... 96
20  System Performance...................................................................................................................97
Chapter 4  READ ME FIRST...................................................................................................................99
1   About This Manual........................................................................................................................99
1.1   Notices ................................................................................................................................99
1.2   Purpose of this guide ..........................................................................................................99
1.3   Prerequisite skills ................................................................................................................99
2  Scan Monitor............................................................................................................................... 100
2.1   New Patient....................................................................................................................... 100
2.2   Patient Schedule............................................................................................................... 101
2.3  Scan Setup......................................................................................................................... 102
3  Image Monitor..............................................................................................................................108
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
  Table of Contents 7