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Title: A method to evaluate the performance of x-ray imaging scintillators by means of the brightness-sharpness index (BSI)
Authors: Κάβουρας, Διονύσης Α.
Κανδαράκης, Ιωάννης Σ.
Πρασόπουλος, Παναγιώτης Π.
Κανελλόπουλος, Ε.
Νομικός, Κωνσταντίνος Δ.
Contributors: Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: Phosphor;Phosphor screens;Φώσφορος;Εικόνες φωσφόρου
Subjects: Medicine
Issue Date: 4-May-2015
Publisher: SAGE Publications
Abstract: PURPOSE: To propose an image quality index, the brightness-sharpness index (BSI), for assessing the quality of the image produced by phosphors of medical imaging detectors. MATERIAL AND METHODS: BSI was evaluated by experimental X-ray luminescence and modulation transfer function measurements. BSI was determined for a number of test phosphor screens prepared from Gd2O2S:Tb, La2O2S:Tb, and Y2O2S:Tb phosphor materials. The screens covered a wide range of coating thicknesses from 50 to 150 mg/cm2 and measurements were performed for X-ray tube voltages between 50 and 120 kVp. RESULTS: Gd2O2S:Tb phosphor exhibited higher brightness and sharpness, as compared to the other phosphor materials, for all screens and X-ray tube voltages used. Best Gd2O2S:Tb performance was observed for thin screens and high tube voltages. La2O2S:Tb exhibited higher BSI values than Y2O2S:Tb for medium and high tube voltages. CONCLUSION: Results showed that phosphor materials of high X-ray detection and X-ray-to-light conversion properties exhibit high BSI values indicating that BSI may provide a means of phosphor performance evaluation for imaging applications.
Language: English
Citation: Cavouras, D., Kandarakis, I., Prassopoulos, P., Kanellopoulos, E., Nomicos, C., et al. (March 1999). A method to evaluate the performance of x-ray imaging scintillators by means of the brightness-sharpness index (BSI). Acta Radiologica. 40(2). pp. 211-216. SAGE Publications: 1999.
Journal: Acta Radiologica
Type of Journal: With a review process (peer review)
Access scheme: Embargo
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
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