Half-value-layer increase owing to tungsten buildup in the x-ray tube: fact or fiction
| Autor: | J P Felmlee, Joel E. Gray, J G Stears |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Quality Control
business.industry X-ray chemistry.chemical_element Optical density Tungsten X-ray tube law.invention Radiography chemistry law Glass window Hardening (metallurgy) Medicine Radiology Nuclear Medicine and imaging Glass Composite material Nuclear medicine business Half-value layer Technology Radiologic |
| Zdroj: | Radiology. 160(3) |
| ISSN: | 0033-8419 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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