A test object designed to be used quickly and easily on a routine basis to provide an ongoing check of imaging performance, particularly those aspects which are most liable to deterioration.

Measure:
• Ten-step grey-scale plus two points for Sensitometric measurements
• Limiting Spatial Resolution (x2 in TOR MAX)
• Low-contrast large-detail detectability
• High-contrast small-detail detectability
• Irregular-shaped particles on a step-wedge background
• Low Contrast Resolution Pattern