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An efficient pre-ob...
An efficient pre-object collimator based on an x-ray lens
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- Fredenberg, Erik, 1979- (författare)
- KTH,Medicinsk bildfysik,Medical Imaging
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- Cederström, Björn (författare)
- KTH,Medicinsk bildfysik,Medical Imaging
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- Åslund, Magnus (författare)
- Sectra Mamea AB, Smidesvägen 5, SE‐171 41 Solna, Sweden
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- Nillius, Peter (författare)
- KTH,Medicinsk bildfysik,Medical Imaging
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- Danielsson, Mats (författare)
- KTH,Medicinsk bildfysik,Medical Imaging
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(creator_code:org_t)
- 2009-01-27
- 2009
- Engelska.
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Ingår i: Medical physics (Lancaster). - : Wiley. - 0094-2405. ; 36:2, s. 626-633
- Relaterad länk:
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http://dx.doi.org/10...
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https://kth.diva-por... (primary) (Raw object)
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http://kth.diva-port...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A multiprism lens (MPL) is a refractive x-ray lens with one-dimensional focusing properties. If used as a pre-object collimator in a scanning system for medical x-ray imaging, it reduces the divergence of the radiation and improves on photon economy compared to a slit collimator. Potential advantages include shorter acquisition times, a reduced tube loading, or improved resolution. We present the first images acquired with a MPL in a prototype for a scanning mammography system. The lens showed a gain of flux of 1.32 compared to a slit collimator at equal resolution, or a gain in resolution of 1.31–1.44 at equal flux. We expect the gain of flux in a clinical setup with an optimized MPL and a custom-made absorption filter to reach 1.67, or 1.45–1.54 gain in resolution.
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 -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
Nyckelord
- x-ray imaging
- mammography
- x-ray optics
- multiprism lens
- collimation
- x-ray flux
- acquisition time
- resolution
- Other engineering physics
- Övrig teknisk fysik
- Optical physics
- Optisk fysik
- Radiological physics
- Radiofysik
- Medical engineering
- Medicinsk teknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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