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A low-absorption x-...
A low-absorption x-ray energy filter for small-scale applications
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- Fredenberg, Erik, PhD, 1979- (författare)
- KTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Medical Imaging
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- Cederström, Björn (författare)
- KTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Medical Imaging
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- Nillius, Peter (författare)
- KTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Medical Imaging
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- Ribbing, Carolina (författare)
- Uppsala universitet,Tillämpad materialvetenskap
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- Karlsson, Staffan (författare)
- KTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Medical Imaging
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- Danielsson, Mats (författare)
- KTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Medical Imaging
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(creator_code:org_t)
- The Optical Society, 2009
- 2009
- Engelska.
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Ingår i: Optics Express. - : The Optical Society. - 1094-4087. ; 17:14, s. 11388-11398
- Relaterad länk:
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https://doi.org/10.1...
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http://www.opticsinf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We present an experimental and theoretical evaluation of an x-ray energy filter based on the chromatic properties of a prism-array lens (PAL). It is intended for small-scale applications such as medical imaging. The PAL approximates a Fresnel lens and allows for high efficiency compared to filters based on ordinary refractive lenses, however at the cost of a lower energy resolution. Geometrical optics was found to provide a good approximation for the performance of a flawless lens, but a field-propagation model was used for quantitative predictions. The model predicted a 0.29 ΔE/E energy resolution and an intensity gain of 6.5 for a silicon PAL at 23.5 keV. Measurements with an x-ray tube showed good agreement with the model in energy resolution and peak energy, but a blurred focal line contributed to a 29% gain reduction. We believe the blurring to be caused mainly by lens imperfections, in particular at the periphery of the lens.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Övrig annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
Nyckelord
- X-ray optics
- Diffractive lenses
- Refractive lenses
- Filters
- Medical x-ray imaging
- Radiation
- Wave propagation
- Optical physics
- Optisk fysik
- Radiological physics
- Radiofysik
- Other engineering physics
- Övrig teknisk fysik
- Medical engineering
- Medicinsk teknik
- TECHNOLOGY
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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