eprintid: 1409756 rev_number: 39 eprint_status: archive userid: 608 dir: disk0/01/40/97/56 datestamp: 2013-10-14 10:43:16 lastmod: 2021-09-19 23:56:59 status_changed: 2013-10-14 10:43:16 type: article metadata_visibility: show item_issues_count: 0 creators_name: Konstantinidis, AC creators_name: Szafraniec, MB creators_name: Rigon, L creators_name: Tromba, G creators_name: Dreossi, D creators_name: Sodini, N creators_name: Liaparinos, PF creators_name: Naday, S creators_name: Gunn, S creators_name: McArthur, A creators_name: Speller, RD creators_name: Olivo, A title: X-ray Performance Evaluation of the Dexela CMOS APS X-ray Detector Using Monochromatic Synchrotron Radiation in the Mammographic Energy Range ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F42 keywords: Complementary metal-oxide-semiconductor (CMOS), digital mammography, image quality, synchrotron radiation note: © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. abstract: Digital detectors based on complementary metaloxide-semiconductors (CMOS) active pixel sensor (APS) technology have been introduced recently in many scientific applications. This work is focused on the X-ray performance evaluation of a novel CMOS APS detector in low energy medical imaging applications using monochromatic synchrotron radiation (i.e., 17–35 keV), which also allows studying how the performance varies with energy. The CMOS sensor was coupled to a Thallium-activated structured cesium iodide (CsI:Tl) scintillator and the detector’s X-ray performance evaluation was carried out in terms of sensitivity, presampling modulation transfer function (pMTF), normalized noise power spectrum (NNPS) and the resulting detective quantum efficiency (DQE). A Monte Carlo simulation was used to validate the experimentally measured low frequency DQE. Finally, the effect of iodine’s secondary generated K-fluorescence X-rays on pMTF and DQE results was evaluated. Good agreement (within 5%) was observed between the Monte Carlo and experimentally measured low frequency DQE results. A CMOS APS detector was characterized for the first time over a wide range of low energies covering the mammographic spectra. The detector’s performance is limited mainly by the detectability of the scintillator. Finally, we show that the current data could be used to calculate the detector’s pMTF, NNPS and DQE for any mammographic spectral shape within the investigated energies. date: 2013-10 publisher: IEEE official_url: http://dx.doi.org/10.1109/TNS.2013.2276123 vfaculties: VENG oa_status: green full_text_type: other language: eng primo: open primo_central: open_green article_type_text: Article verified: verified_manual elements_source: Manually entered elements_id: 909524 doi: 10.1109/TNS.2013.2276123 lyricists_name: Olivo, Alessandro lyricists_name: Speller, Robert lyricists_id: AOLIV86 lyricists_id: RDSPE08 full_text_status: public publication: IEEE Transactions on Nuclear Science volume: 60 number: 5 place_of_pub: US pagerange: 3969 - 3980 pages: 12 event_location: US issn: 0018-9499 citation: Konstantinidis, AC; Szafraniec, MB; Rigon, L; Tromba, G; Dreossi, D; Sodini, N; Liaparinos, PF; ... Olivo, A; + view all <#> Konstantinidis, AC; Szafraniec, MB; Rigon, L; Tromba, G; Dreossi, D; Sodini, N; Liaparinos, PF; Naday, S; Gunn, S; McArthur, A; Speller, RD; Olivo, A; - view fewer <#> (2013) X-ray Performance Evaluation of the Dexela CMOS APS X-ray Detector Using Monochromatic Synchrotron Radiation in the Mammographic Energy Range. IEEE Transactions on Nuclear Science , 60 (5) 3969 - 3980. 10.1109/TNS.2013.2276123 <https://doi.org/10.1109/TNS.2013.2276123>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/1409756/1/Konstantinidis_IEEE_TNS_Preprint.pdf