Standard Practice for Qualification of Radioscopic Systems

Importancia y uso:

5.1 As with conventional radiography, radioscopic examination is broadly applicable to the many materials and object configurations which may be penetrated with X-rays or gamma rays. The high degree of variation in architecture and performance among radioscopic systems due to component selection, physical arrangement, and object variables makes it necessary to establish the performance that the selected radioscopic system is capable of achieving in specific applications. The manufacturer or integrator of the radioscopic system, as well as the user, require a common basis for determining the performance level of the radioscopic system.

5.2 This practice does not purport to provide a method to measure the performance of individual radioscopic system components that are manufactured according to a variety of industry standards. This practice covers measurement of the combined performance of the radioscopic system elements when operated together as a functional radioscopic system.

5.3 This practice addresses the performance of radioscopic systems in the static mode or dynamic mode, that can allow relative test-part motion between source, part, and detector, and may or may not have the ability to effect parameter changes during the radioscopic examination process. Users of radioscopy are cautioned that the dynamic aspects of radioscopy can have beneficial as well as detrimental effects upon system performance.

5.4 Radioscopic system performance measured pursuant to this practice does not guarantee the level of performance which may be realized in actual operation but does provide a baseline against which periodic performance evaluations can be compared to ensure the system is operating within established limits. The effects of object-geometry and orientation-generated scattered radiation cannot be reliably predicted by a standardized examination. All radioscopic systems age and degrade in performance as a function of time. Maintenance and operator adjustments, if not correctly made, can adversely affect the performance of radioscopic systems; therefore, the system shall be re-qualified at periodic intervals (see Section 10).

5.5 The performance of the radioscopic system operator in manual and semi-automatic radioscopic systems is not taken into account in this practice and can have a major effect upon radioscopic system performance. Operator qualifications and certification are an important aspect of system operation and are covered in a separate written procedure required by Practice E1255.

Subcomité:

E07.01

Referida por:

E1161-21, E1734-23, E1416-23, E1647-16R22, E1936-20, E2533-21, E1255-23, E1475-13R23

Volúmen:

03.03

Número ICS:

19.100 (Non-destructive testing)

Palabras clave:

contrast sensitivity; detector unsharpness; duplex wire gauge; edge sharpening; field of view (FOV); focal detector distance (FDD); focal object distance (FOD); focal spot size; image processor; image quality indicator; imager; image unsharpness; line-pair gauge; magnification; near real-time radioscopy; noise reduction; penetrating radiation; radioscopic; radioscopic examination geometry; raster scan; real-time radioscopy; static mode; step wedge; transmitted beam;