A 24 keV liquid-metal-jet x-ray source for biomedical applications
2011 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 82, no 12, 123701- p.Article in journal (Refereed) Published
We present a high-brightness 24-keV electron-impact microfocus x-ray source based on continuous operation of a heated liquid-indium/gallium-jet anode. The 30–70 W electron beam is magnetically focused onto the jet, producing a circular 7–13 μm full width half maximum x-ray spot. The measured spectral brightness at the 24.2 keV In Kα line is 3 × 109 photons/(s × mm2 × mrad2 × 0.1% BW) at 30 W electron-beam power. The high photon energy compared to existing liquid-metal-jet sources increases the penetration depth and allows imaging of thicker samples. The applicability of the source in the biomedical field is demonstrated by high-resolution imaging of a mammography phantom and a phase-contrast angiography phantom.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2011. Vol. 82, no 12, 123701- p.
x-ray imaging, x-ray source, phase contrast
Medical Equipment Engineering
IdentifiersURN: urn:nbn:se:kth:diva-62137DOI: 10.1063/1.3664870ISI: 000298643100029PubMedID: 22225218ScopusID: 2-s2.0-84855323212OAI: oai:DiVA.org:kth-62137DiVA: diva2:479880
FunderSwedish Research Council
QC 201201182012-01-182012-01-182015-03-31Bibliographically approved