Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging

Importancia y uso:

5.1 One of the factors affecting the quality of radiologic images is the geometric unsharpness. The degree of geometric unsharpness is dependent on the focal spot size of the radiation source, the distance between the source and the object to be radiographed, and the distance between the object to be radiographed and the detector (imaging plate, Digital Detector Array (DDA) or film). This test method allows the user to determine the effective focal size of the X-ray source. This result may then be used to establish source to object and object to detector distances appropriate for maintaining the desired degree of geometric unsharpness or maximum magnification for a given radiographic imaging application, or both. Some ASTM standards require this value for calculation of a required magnification, for example, Practices E1255, E2033, and E2698.

Subcomité:

E07.01

Referida por:

E2698-18E01, E1000-24, E0094_E0094M-22, E1734-23, E2903-18, E2662-15R22, E1742_E1742M-23, E2698-18E01, E2737-23, E2104-22, E2033_E2033M-24, E2446-24, E1255-23, E1411-23

Volúmen:

03.03

Número ICS:

19.100 (Non-destructive testing)

Palabras clave:

focal spot; pinhole camera; pinhole imaging; X-ray; X-ray tube;