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Detectors for the future of X-ray imaging
KTH, School of Engineering Sciences (SCI), Physics.
KTH, School of Engineering Sciences (SCI), Physics.
2010 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 139, no 1-3, 327-333 p.Article in journal (Refereed) Published
Abstract [en]

In recent decades, developments in detectors for X-ray imaging have improved dose efficiency. This has been accomplished with for example, structured scintillators such as columnar CsI, or with direct detectors where the X rays are converted to electric charge carriers in a semiconductor. Scattered radiation remains a major noise source, and fairly inefficient anti-scatter grids are still a gold standard. Hence, any future development should include improved scatter rejection. In recent years, photon-counting detectors have generated significant interest by several companies as well as academic research groups. This method eliminates electronic noise, which is an advantage in low-dose applications. Moreover, energy-sensitive photon-counting detectors allow for further improvements by optimising the signal-to-quantum-noise ratio, anatomical background subtraction or quantitative analysis of object constituents. This paper reviews state-of-the-art photon-counting detectors, scatter control and their application in diagnostic X-ray medical imaging. In particular, spectral imaging with photon-counting detectors, pitfalls such as charge sharing and high rates and various proposals for mitigation are discussed.

Place, publisher, year, edition, pages
2010. Vol. 139, no 1-3, 327-333 p.
National Category
Computer Vision and Robotics (Autonomous Systems) Medical Laboratory and Measurements Technologies Other Environmental Engineering
URN: urn:nbn:se:kth:diva-27848DOI: 10.1093/rpd/ncq074ISI: 000277738200062ScopusID: 2-s2.0-77953330647OAI: diva2:387371
QC 20110114Available from: 2011-01-14 Created: 2011-01-03 Last updated: 2011-01-14Bibliographically approved

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