Standard Test Method for Measurement of the Effective Focal Spot Size of Mini and Micro Focus X-ray Tubes

Importancia y uso:

5.1 One of the factors affecting the image quality of a radiographic image is geometric unsharpness. The degree of geometric unsharpness is dependent upon the focal spot size of the radiation source, the distance between the source and the object to be radiographed, the distance between the object to be radiographed and the image plane (film, imaging plate, Digital Detector Array (DDA), or radioscopic detector). This test method allows the user to determine the effective focal spot size (dimensions) of the X-ray source. This result can then be used to establish source to object and object to image detector distances appropriate for maintaining the desired degree of geometric unsharpness or maximum magnification possible, or both, for a given radiographic imaging application. The accuracy of this method is dependent upon the spatial resolution of the imaging system, magnification, and signal-to-noise of the resultant images.

Subcomité:

E07.01

Referida por:

E2698-18E01, E1000-24, E0094_E0094M-22, E1734-23, E2698-18E01, E1165-20, E2737-23, E2446-24, E1255-23, E1411-23, E2033_E2033M-24

Volúmen:

03.04

Número ICS:

11.040.50 (Radiographic equipment), 19.100 (Non-destructive testing)

Palabras clave:

focal spots; microfocus; X-ray imaging; X-ray tube;