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A Tunable Energy Fi...
A Tunable Energy Filter for Medical X-Ray Imaging
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- Fredenberg, Erik, PhD, 1979- (author)
- KTH,Medicinsk bildfysik,Medical Imaging
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- Cederström, Björn (author)
- KTH,Medicinsk bildfysik,Medical Imaging
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Åslund, Magnus (author)
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- Ribbing, Carolina (author)
- Uppsala universitet,Fasta tillståndets elektronik,Department of Engineering Sciences
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- Danielsson, Mats, Professor (author)
- KTH,Medicinsk bildfysik,Medical Imaging
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(creator_code:org_t)
- Hindawi, 2008
- 2008
- English.
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In: X-Ray Optics and Instrumentation. - : Hindawi. - 1687-7632 .- 1687-7640. ; 2008
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Abstract
Subject headings
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- A multiprism lens (MPL) is a refractive X-ray lens, and its chromatic properties can be employed in an energy filtering setup to obtain a narrow tunable X-ray spectrum. We present the first evaluation of such a filter for medical X-ray imaging. The experimental setup yields a 6.6 gain of flux at 20 keV, and we demonstrate tunability by altering the energy spectrum to center also around 17 and 23 keV. All measurements are found to agree well with ray-tracing and a proposed geometrical model. Compared to a model mammography system with absorption filtering, the experimental MPL filter reduces dose 13–25% for 3–7 cm breasts if the spectrum is centered around the optimal energy. Additionally, the resolution is improved 2.5 times for a 5 cm breast. The scan time is increased 3 times but can be reduced with a slightly decreased energy filtering and resolution.
Subject headings
- 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)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- x-ray imaging
- mammography
- x-ray optics
- multiprism lens
- energy filtering
- radiation dose
- Other engineering physics
- Övrig teknisk fysik
- Medical engineering
- Medicinsk teknik
- Radiological physics
- Radiofysik
- Optical physics
- Optisk fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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