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	2015-02-03T17:18:47Z
dc.date.available	2015-02-03T17:18:47Z
dc.date.issued	2015-02-03
dc.identifier.uri	http://hdl.handle.net/11400/5583
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	http://e-jst.teiath.gr/	en
dc.subject	MTF
dc.subject	Nuclear medicine
dc.subject	Slanted-edge Method
dc.subject	Πυρηνική ιατρική
dc.subject	CMOS
dc.subject	CR
dc.subject	Image Quality
dc.subject	Μέθοδος Slanted-edge
dc.subject	Pin-hole Phantoms
dc.title	Image quality assessment in CMOS and cr medical imaging systems	en
heal.type	journalArticle
heal.generalDescription	Special issue: Workshop on Bio-Medical Instrumentation and related Engineering And Physical Sciences, Technological Educational Institute of Athens, 6 July 2012	en
heal.classification	Medicine
heal.classification	Medical physics
heal.classification	Ιατρική
heal.classification	Ιατρική φυσική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh00006614
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85083001
heal.classificationURI	N/A-Ιατρική
heal.classificationURI	N/A-Ιατρική φυσική
heal.contributorName	Καλύβας, Νεκτάριος Ι.	el
heal.contributorName	Φούντος, Γεώργιος Π.	el
heal.contributorName	Κανδαράκης, Ιωάννης Σ.	el
heal.language	en
heal.access	free
heal.publicationDate	2012
heal.bibliographicCitation	Ntales, C., Kynatidis, N., Michail, C.M., Seferis, I.E., Valais, I.G., et al. (2012). Image quality assessment in CMOS and cr medical imaging systems. "e-Journal of Science & Technology". [Online] 7(3): 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	Νερατζής, Ηλίας	el
heal.publisher	Σιανούδης, Ιωάννης	el
heal.publisher	Βαλαής, Ιωάννης Γ.	el
heal.publisher	Φούντος, Γεώργιος Π.	el
heal.journalName	e-Journal of Science & Technology	en
heal.journalName	e-Περιοδικό Επιστήμης & Τεχνολογίας	el
heal.journalType	peer-reviewed
heal.fullTextAvailability	true