Image quality assessment in CMOS and CR medical imaging systems

dc.contributor.author	Νταλές, Χριστόφορος	el
dc.contributor.author	Κυνατίδης, Νικόλαος	el
dc.contributor.author	Μιχαήλ, Χρήστος Μ.	el
dc.contributor.author	Σεφέρης, Ιωάννης Ε.	el
dc.contributor.author	Βαλαής, Ιωάννης Γ.	el
dc.date.accessioned	2015-01-21T09:45:11Z
dc.date.available	2015-01-21T09:45:11Z
dc.date.issued	2015-01-21
dc.identifier.uri	http://hdl.handle.net/11400/4402
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	[χ.ό.]	el
dc.subject	Digital mammography
dc.subject	Imaging sensor
dc.subject	Ψηφιακή μαστογραφία
dc.subject	Αισθητήρας εικόνας
dc.title	Image quality assessment in CMOS and CR medical imaging systems	en
heal.type	journalArticle
heal.generalDescription	Workshop on Bio-Medical Instrumentation and related Engineering and Physical Science	en
heal.classification	Medicine
heal.classification	Medical technology
heal.classification	Ιατρική
heal.classification	Ιατρική τεχνολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://skos.um.es/unescothes/C02465
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Ιατρική τεχνολογία
heal.contributorName	Καλύβας, Νεκτάριος Ι.	el
heal.contributorName	Φούντος, Γεώργιος Π.	el
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.identifier.secondary	ISSN 17905613
heal.language	en
heal.access	free
heal.recordProvider	Τ.Ε.Ι. Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Βιοϊατρικής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2012
heal.bibliographicCitation	Ntales, C., Kynatidis, N., Michail, C., Seferis, I., Valais, I., et al. (2012). Image quality assessment in CMOS and CR medical imaging systems. e-Journal of Science & Technology. pp. 7-13. Available from: http://e-jst.teiath.gr	en
heal.abstract	Fundamental imaging performance in terms of Modulation Transfer Function (MTF) was investigated for a high resolution CMOS based imaging sensor and a commercial Computed Radiography (CR) unit. The CMOS device consists of a 33.91 mg/cm2 Gd2O2S:Tb scintillating screen, placed in direct contact with a CMOS photodiode array. The CMOS photodiode array, featuring 1200×1600 pixels with a pixel pitch of 22.5 μm , was used as an optical photon detector. The MTF was measured using the slanted-edge method (measuring the Edge Spread Function–ESF), as well as by using pin-hole phantoms (measuring the Point Spread Function–PSF). The experimental procedure was performed under the representative radiation quality (RQA) settings, RQA 5 (70 kVp digital radiography) and RQA M2 (28 kVp digital mammography) recommended by the International Electrotechnical Commission Reports 62220-1 and 62220-1-2 respectively. It was found that the detector response function was linear for the exposure ranges under investigation. MTF for the pinhole method was found to increase by diminishing pin-hole size up to the detector pitch (22.5 μm ). Additionally, our results showed that for the same RQA quality, MTF was comparable in the whole spatial frequency range by both ESF and PSF (50 μm ) methods. MTF of the CMOS imaging sensor was found better compared with the CR unit as well as compared with previously published data for other CCD and CMOS sensor.	en
heal.publisher	[χ.ό.]	el
heal.journalName	e-Journal of Science & Technology	en
heal.journalName	e-Περιοδικό Επιστήμης & Τεχνολογίας	el
heal.journalType	peer-reviewed
heal.fullTextAvailability	true