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The Advantage of Using a Smaller Focal Spot for NDT Applications

For nondestructive testing (NDT), image quality and exposure time are two critical parameters. Reducing exposure time will result in faster workflow. However, a reduction in exposure time can come at the price of image quality, loss of detail, and increased geometric unsharpness. An X-ray tube with a smaller focal spot enables the operator to optimize setup to reduce exposure time or gain in image quality, or in most cases, accomplish both.

References

Ahmed, Syed Naeem, 2007, Physics and Engineering of Radiation Detection, Elsevier Science.

Bushberg, Jerrold T., J. Anthony Seibert, Edwin M. Leiholdt, Jr., and John M. Boone, 1994, The Essential Physics of Medical Imaging, Third Edition, Lippincott Williams & Wilkins (LWW) Philadelphia, PA.

NDT Resource Center, 2018, “Geometric Unsharpness Calculations,” accessed 4 January 2019, https://www.nde-ed.org/GeneralResources/Formula/RTFormula/Unsharpness/GeometricUnsharpness.htm

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