Tube arcing
Citation, DOI, disclosures and article data
Citation:
Gaillard F, Murphy A, Glick Y, et al. Tube arcing. Reference article, Radiopaedia.org (Accessed on 25 Mar 2025) https://doi.org/10.53347/rID-2220
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2220
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At the time the article was created Frank Gaillard had no recorded disclosures.
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At the time the article was last revised Andrew Murphy had no financial relationships to ineligible companies to disclose.
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Tube arcing occurs when there is a short-circuit within the tube, typically from the cathode to the tube envelope. The result is a temporary loss of x-ray output and a localized artifact.
A number of causes of tube arcing are recognized 1:
- insulator surface flashover
- insulator breakdown
- vacuum flashover
- most common
- due to particulate impurities or gas within the tube
- new tubes are more prone to this problem due to residual gas
A small amount of tube arching is not uncommon and modern scanners have automated processes to remove the artifact from the final images 1,2.
References
- 1. Mithun S, Jha AK, Panchal K, Purandare NC, Shah S, Agrawal A, Rangarajan V. A rare cause of tube arcing artifact seen in computed tomography image of a positron emission tomography/computed tomography scanner. (2016) The Indian journal of radiology & imaging. 26 (1): 153-5. doi:10.4103/0971-3026.178368 - Pubmed
- 2. Jiang Hsieh. Computed Tomography. (2018) ISBN: 9780819444257
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