Partial volume averaging (CT artifact)
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At the time the article was created Vikas Garg had no recorded disclosures.
View Vikas Garg's current disclosuresAt the time the article was last revised Karol Dreżewski had no financial relationships to ineligible companies to disclose.
View Karol Dreżewski's current disclosures- Partial volume averaging
- Partial-volume-averaging
- Partial volume artefact
Partial volume artifact occurs when tissues of widely different absorption are encompassed on the same CT voxel producing a beam attenuation proportional to the average value of these tissues.
The latest generation of CT scanners with an associated reduction in the volume of a voxel has substantially reduced the occurrence of this artifact.
Partial volume averaging is particularly problematic in CT angiography (e.g. misdiagnosis of an apparent contrast filling defect caused by the artifact as PE). Therefore the use of thin section reconstructions (1-1.5 mm) are recommended where the impact of this artifact is not negligible 2.
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References
- 1. Bushberg JT, Seibert JA, Jr. EML et-al. The Essential Physics of Medical Imaging. LWW. ISBN:0781780578. Read it at Google Books - Find it at Amazon
- 2. Benjamin L. Triche, John T. Nelson Jr, Noah S. McGill, Kristin K. Porter, Rupan Sanyal, Franklin N. Tessler, Jonathan E. McConathy, David M. Gauntt, Michael V. Yester, Satinder P. Singh. Recognizing and Minimizing Artifacts at CT, MRI, US, and Molecular Imaging. (2019) RadioGraphics. 39 (4): 1017-1018. doi:10.1148/rg.2019180022 - Pubmed
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