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A Method for Correcting Bone Induced Artifacts in Computed Tomography Scanners
Abstract
A method that corrects for artifacts in X-ray transmission scanners created by the alteration of the energy spectrum by bone is described. The method involves two reconstructions of the pictures: the first establishes the approximate distribution of bone and the second enables the artifacts to be eliminated. The first reconstruction is needed to establish the total amount of bone along each ray. Assuming that the X-ray energy spectrum is known, it is shown how the line integrals can be corrected. The method was tested on several mathematical phantoms as well as on human head data. The nonlinear nature of the spectral artifacts is shown to produce streaks in certain phantoms.
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“the large extracranial metal components and dental cement of the implant can cause beam hardening that can appear as cupping, streaks, dark bands or flare in the µCT38–40.”
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“…raising the pixel value pmono (u, v|θ, ϕ) to the power of i, αi are precalculated polynomial mapping coefficients, which are determined not only by the spectrum but also the metal material (since the energy dependence of attenuation coefficient is material dependent) (Joseph and Spital 1978).”
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“Additionally, IDD may require separate correction for spectral effects such as beamhardening (Joseph and Spital 1978).”
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Metadata
- Authors
- Joseph, P. M., & Spital, R. D.
- Affiliations
- NewYork–Presbyterian Hospital (US)
- Venue
- Journal of Computer Assisted Tomography
- Published
- 1978-01
- Volume
- 2
- Issue
- 1
- Pages
- 100-108
- ISSN
- 0363-8715 (ISSN-L)
- OpenAlex
- W2000441297
- Cited by
- 281
- References
- 0
- Citations by year
- 2026: 7 · 2025: 4 · 2024: 10 · 2023: 6 · 2022: 13 · 2021: 6 · 2020: 9 · 2019: 12 · 2018: 17 · 2017: 10 · 2016: 10 · 2015: 9 · 2014: 10 · 2013: 10 · 2012: 13
- FWCI
- 8.33
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Computer Assisted Tomography (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Advanced X-ray and CT Imaging
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Medical Imaging Techniques and Applications
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Radiation Dose and Imaging
- Keywords
- bone artifacts, spectral artifacts, X-ray spectra, streak artifacts, head CT, image reconstruction, mathematical phantoms
- MeSH terms
- Bone and Bones, Humans, Mathematics, Models, Structural, Skull, Technology, Radiologic, Tomography, X-Ray Computed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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