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Imaging with multi-...
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Fredenberg, Erik,PhD,1979-KTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova
(författare)
Imaging with multi-prism x-ray lenses
- Artikel/kapitelEngelska2008
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SPIE,2008
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LIBRIS-ID:oai:DiVA.org:kth-38399
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-38399URI
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https://doi.org/10.1117/12.770434DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:kon swepub-publicationtype
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QC 20210120
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The multi-prism lens (MPL) is a refractive x-ray lens consisting of two rows of prisms facing each other at an angle. Rays entering the lens at the periphery will encounter a larger number of prisms than will central ones, hence experiencing a greater refraction. The focusing effect of the MPL can be used to gather radiation from a large aperture onto a smaller detector, and accordingly to make better use of the available x-ray flux in medical x-ray imaging. Potential advantages of a better photon economy include shorter acquisition times, a reduced tube loading, or an improved resolution. Since the focusing effect is one-dimensional it matches the design of scanning systems. In this study we present the first images acquired with an MPL instead of the pre-breast slit collimator in a scanning mammography system. According to the measurements, the MPL is able to increase the flux 32% at equal resolution compared to the slit collimator, or to improve the resolution 2.4 mm(-1) at equal flux. If used with a custom-made absorption filter in a clinical set-up, the gain of flux of the MPL is expected to be at least 45%, and the corresponding improvement in resolution to be 3 mm(-1).
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Cederström, BjörnKTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova(Swepub:kth)u1oerth9
(författare)
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Åslund, Magnus
(författare)
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Nillius, PeterKTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova(Swepub:kth)u1mhl6dq
(författare)
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Lundqvist, Mats
(författare)
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Danielsson, MatsKTH,Medicinsk bildfysik,Albanova VinnExcellence Center for Protein Technology, ProNova(Swepub:kth)u1m3qe0f
(författare)
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KTHMedicinsk bildfysik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Medical Imaging 2008 - Physics of Medical Imaging: SPIE, s. 91308-913089780819470973
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