A Comparison of Mammographic X-Ray Spectra
| Autor: | Thomas R. Fewell, Ralph E. Shuping |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Photon
medicine.diagnostic_test Image quality business.industry Spectrum Analysis X-Rays Astrophysics::High Energy Astrophysical Phenomena Physics::Medical Physics Spectral line Anode Spectral shaping Optics Humans Medicine Mammography Radiology Nuclear Medicine and imaging business Nuclear medicine X ray spectra Beam (structure) |
| Zdroj: | Radiology. 128:211-216 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/128.1.211 |
| Popis: | X-ray spectra produced by mammographic systems are compared to spectra from conventional diagnostic x-ray systems. Some systems use special anode materials and beam filters to produce x-ray spectra more suitable for mammography. The data show that the spectra produced by some systems are unique; in fact, one using molybdenum for both an anode and beam filtering element can produce an x-ray spectrum having more than 80% of the photons below 20 KeV. Using some typical breast phantom materials as attenuators, the primary x-ray spectra incident upon the imaging system were simulated and displayed. Implications of spectral shaping to image quality and patient dose are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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