An efficient pre-object collimator based on an x-ray lens
2009 (English)In: Medical physics (Lancaster), ISSN 0094-2405, Vol. 36, no 2, 626-633 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2009. Vol. 36, no 2, 626-633 p.
x-ray imaging, mammography, x-ray optics, multiprism lens, collimation, x-ray flux, acquisition time, resolution
Other Engineering and Technologies not elsewhere specified Atom and Molecular Physics and Optics Radiology, Nuclear Medicine and Medical Imaging Medical Laboratory and Measurements Technologies
IdentifiersURN: urn:nbn:se:kth:diva-11634DOI: 10.1118/1.3062926ISI: 000262852600037ScopusID: 2-s2.0-59249085647OAI: oai:DiVA.org:kth-11634DiVA: diva2:278565
QC 201007132009-11-272009-11-272012-01-18Bibliographically approved