NEMA XR 11-1993 (R1999)
Withdrawn
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TEST STANDARD FOR DETERMINATION OF THE LIMITING SPATIAL RESOLUTION OF X-RAY IMAGE INTENSIFIER SYSTEMS
12-03-2013
12-06-2012
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
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