Effective size of the transverse dimension of x-ray-tube focal spots.
Corrections for nonuniform x-ray intensity distributions have been computed for the dimension perpendicular to the anode-cathode axis of x-ray-tube focal spots. These correction factors were developed from comparison of OTFs for focal spots with uniform intensity distributions to those for focal spots with symmetric double-peaked intensity distributions.
D013679:Technology, Radiologic; D014894:Weights and Measures