Half-value-layer increase owing to tungsten buildup in the x-ray tube: Fact or fiction

J. G. Stears, J. P. Felmlee, J. E. Gray

Research output: Contribution to journalArticle

3 Scopus citations


The half-value layer (HVL) of an x-ray beam is generally believed to increase with x-ray tube use. This increase in HVL has previously been attributed to the hardening of the x-ray beam as a result of a buildup of tungsten on the x-ray tube glass window. Radiographs and HVL measurements were obtained to determine the effect of tungsten deposited on the x-ray tube windows. This work, along with the HVL data from approximately 200 functioning x-ray tubes used for all applications that were monitored for more than 8 years, indicated there is no significant increase in HVL with diagnostic x-ray tube use.

Original languageEnglish (US)
Pages (from-to)837-838
Number of pages2
Issue number3
StatePublished - Jan 1 1986


ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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