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Title: Modeling detector performance in digital mammography using the linear cascaded systems approach
Authors: Σπυροπούλου, Βασιλική Α.
Καλύβας, Νεκτάριος Ι.
Γαϊτάνης, Αναστάσιος
Μιχαήλ, Χρήστος Μ.
Παναγιωτάκης, Γεώργιος Σ.
Contributors: Κανδαράκης, Ιωάννης Σ.
Item type: Journal article
Keywords: Digital mammography;Imaging systems--Image quality--Congresses;Ψηφιακή μαστογραφία;Ποιότητα εικόνας
Subjects: Medicine
Medical technology
Ιατρική τεχνολογία
Issue Date: 21-Jan-2015
Date of availability: 21-Jan-2015
Publisher: [χ.ό.]
Abstract: Digital x-ray mammography is a modern method for the early detection of breast cancer. The quality of a mammography image depends on various factors, the detector structure and performance being of primary importance. The aim of this work was to develop an analytical model simulating the imaging performance of a new commercially available digital mammography detector. This was achieved within the framework of the linear cascaded systems (LCS) theory. System analysis has allowed the estimation of important image quality metrics such as the Modulation Transfer Function (MTF), the Noise Power Spectrum (NPS), the Detective Quantum Efficiency (DQE) and the Signal to Noise Ratio (SNR). The detector was an indirect detection system consisting of a large area, 100μm thick, CsI:TI scintillator coupled to an active matrix array of amorphous silicon (a-Si:H) photodiodes combined with thin film transistors (TFT). Pixel size was 100μm, while the active pixel dimension was 70μm. MTF and DQE data were calculated for air kerma conditions of 25, 53, 67 μGy using a 28 kVp Mo-Mo x-ray spectrum. In addition, the scintillator thickness was changed in order to find the optimum material characteristics. The theoretical results were compared with published experimental data. The deviation between the theoretical and experimental MTF curves was less than 4%, while the DQE differences were found at an acceptable level.
Language: English
Citation: Spyropoulou, V., Kalyvas, N., Gaitanis, A., Michail, C., Panayiotakis, G., et al. (2008). Modeling detector performance in digital mammography using the linear cascaded systems approach. e-Journal of Science & Technology. (8). pp. 51-57. Available from:
Journal: e-Περιοδικό Επιστήμης & Τεχνολογίας
e-Journal of Science & Technology
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
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