NEMA XR 11-1993 (R1999)

Foreword
Purpose
Scope
1 Referenced standards
2 Definitions
     Aluminum equivalent
     Automatic brightness control
     Automatic exposure control
     Central axis of the imaging system
     Central axis of the x-ray field
     Central limiting spatial resolution
     Composite video signal
     Entrance field size
     Entrance plane of the XRII system
     Geometric magnification
     Half value layer
     Kilovolts peak (kVp)
     Limiting spatial resolution (LSR)
     Multiple field XRII system
     Off-axis limiting spatial resolution
     Output image of the XRII system
     Radial limiting spatial resolution
     Radiation quality
     Source to entrance plane distance (SED)
     Tangential limiting spatial resolution
     Total filtration
     X-ray image intensifier (XRII) system
3 Test equipment
     Resolution test object
     Image position calibration template
4 Procedure
     Standard system test conditions
       LSR test conditions
       Source to entrance plane distance (SED)
       Alignment
       Position of the resolution test object
       Antiscatter grid
       Exposure, recording and processing conditions
       XRII photofluorographic system
       XRII cine system
       XRII video system
       XRII optical viewing system
     Determination of the LSR
Figures
3-1 Example of a test object suitable for the
     determination of limiting spatial resolution
3-2 Image position calibration template

Includes optical viewing systems, video systems, photofluorographic film recording systems, and cine film recording and projection systems.