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Evaluation of a photon-counting X-ray imaging system
KTH, Tidigare Institutioner (före 2005), Fysik.
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2001 (Engelska)Ingår i: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 48, nr 4, s. 1530-1536Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A digital imaging system has been developed for mammography using silicon strip detectors operated in a pulse-counting mode and configured in a scanned slit geometry. More than 90% of the photons are absorbed in the sensor. The scatter rejection is very efficient and the image formation is nearly optimal since each X ray is processed individually. The result is a very dose-efficient system. In this paper, we present measurements that verify that the performance of the readout electronics is sufficient to count photons at high rates with high quantum efficiency and a charge collection efficiency that does not limit the dose efficiency. The spatial resolution of the system was measured to provide a modulation transfer function of approximately 0.5 at a spatial frequency of 10 lp/mm. Images of a mammography phantom were recorded experimentally to test overall system performance.

Ort, förlag, år, upplaga, sidor
2001. Vol. 48, nr 4, s. 1530-1536
Nyckelord [en]
energy weighting, mammography, photon counting, scanned slit geometry, silicon strip detector, mammography
Identifikatorer
URN: urn:nbn:se:kth:diva-21033DOI: 10.1109/23.958392ISI: 000171660700031Scopus ID: 2-s2.0-0035428732OAI: oai:DiVA.org:kth-21033DiVA, id: diva2:339730
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QC 20100525Tillgänglig från: 2010-08-10 Skapad: 2010-08-10 Senast uppdaterad: 2022-06-25Bibliografiskt granskad

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Cederström, BjörnDanielsson, Mats
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IEEE Transactions on Nuclear Science

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