Radiation-Emitting Products

Focal Spot Dimension QC Test

Policy Guidance Help System logo

Citation:

900.12(e)(5)(iii)(B): Focal spot dimensions. Measured values of the focal spot length (dimension parallel to the anode cathode axis) and width (dimension perpendicular to the anode cathode axis) shall be within the tolerance limits specified in Table 1. 

Table 1: Focal Spot Tolerance Limit 

Nominal Focal Spot Size (mm)Maximum Measured (mm)Dimensions Width (mm)
0.100.150.15
0.150.230.23
0.200.300.30
0.150.230.30
0.300.450.65
0.400.600.85
0.600.901.30