Tube current modulation
Citation, DOI, disclosures and article data
Citation:
Smith H, Murphy A, Vadera S, Tube current modulation. Reference article, Radiopaedia.org (Accessed on 18 Feb 2025) https://doi.org/10.53347/rID-66189
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rID:
66189
Article created:
9 Feb 2019,
Hamish Smith
Disclosures:
At the time the article was created Hamish Smith had no recorded disclosures.
View Hamish Smith's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Andrew Murphy had no financial relationships to ineligible companies to disclose.
View Andrew Murphy's current disclosures
Revisions:
5 times, by
3 contributors -
see full revision history and disclosures
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Synonyms:
- CT current modulation
Tube current modulation is a feature of modern CT scanners to alter the strength of the beam by modulating the current of the x-ray tube depending on the signal to noise ratio. The purpose of tube current modulation is to maintain a near constant signal to noise ratio in the image across different areas of the body with varying thicknesses in order to avoid excessive radiation doses whilst maintaining image quality. It is similar to the automatic exposure control used in film radiography.
References
- 1. Jerrold T. Bushberg, John M. Boone. The Essential Physics of Medical Imaging. (2011) ISBN: 9780781780575
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