Scatter and Blur Corrections for High-Energy X-Ray Radiography

Campbell, Luke W.; Gilbert, Andrew J.; Wittman, Rick S.

doi:10.1109/TNS.2025.3539686

Scatter and Blur Corrections for High-Energy X-Ray Radiography

Journal Article · Thu Feb 06 23:00:00 EST 2025 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/TNS.2025.3539686· OSTI ID:2575556

^[1]; ^[1]; Wittman, Rick S. ^[1]

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

High-energy X-ray radiography is useful as a highly penetrating method for imaging through dense materials. However, the primary modes of interaction of X-rays at these energies involve scattering or the production of secondary high-energy photons, which can interfere with the image. In addition, detector blurring, often resulting from scatter within the detector, can reduce image sharpness. Both of these processes can be mitigated with the use of convolution kernels, with the main challenge being that the proper kernel to use is not known, particularly for the scatter contribution. By radiographing solid slabs of uniform attenuation, we show that point spread functions and material-specific point scatter functions can be determined to significantly reduce the effect of detector blurring and object scatter. Constraining the fits to the slabs and uniform transmission within the slabs is sufficient to recover these functions. A functional form that reproduces the angular distribution of high-energy bremsstrahlung X-rays is presented for recovering point scatter functions. In conclusion, the method is applied to radiographs of objects from bremsstrahlung X-ray sources operating at 4- and 7.5-MV endpoint energies and a significant increase in sharpness is observed.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2575556

Report Number(s):: PNNL-SA--203740

Journal Information:: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4 Vol. 72; ISSN 0018-9499; ISSN 1558-1578

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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Scatter and Blur Corrections for High-Energy X-Ray Radiography

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