Standard Test Piece
Standard Test Piece is designed for routine testing of X-ray machines, and it contains samples of materials of varying density.
Standard Test Piece (STP) is manufactured in Finland to comply with the European Civil Aviation Conference (ECAC) requirements in Doc 30 point 12.3.2 (Annex IV-12-M), European Commission Regulations EU2015/1998, EU300/2008 and European Commission Decision (2015) 8005.
In addition it complies with the U.K. Home Office, Department of Environment, Department for Transport and many regional specifications.
TESTING
Testing must be frequent to notice possible deteriorating of X-ray image. It is recommend to use it at least once a day or more if required by local authorities.
- Test 1 - Single wire resolution
- Test 2 - Useful penetration
- Test 3 - Spatial resolution
- Test 4A - Simple penetration (thin material)
- Test 4B - Simple penetration (thick material)
- Test 5 - Discrimination between materials)
In EU and various non-EU countries it is now a legal obligation to regularly test image quality of security X-ray screening equipment.