Comparison of a-Se direct-conversion and CsI(Tl) indirect-conversion flat-panel digital detectors: a clinical assessment of image quality for general radiography applications

2006 ◽  
Author(s):  
Lori L. Barski ◽  
Xiaohui Wang ◽  
John Wandtke ◽  
David Waldman ◽  
Delphine Davis ◽  
...  
Keyword(s):  
Image Quality ◽  
Clinical Assessment ◽  
Direct Conversion ◽  
Flat Panel

scholarly journals Optimal Color Lighting for Scanning Images of Flat Panel Display using Simplex Search

2018 ◽  
Vol 4 (11) ◽  
pp. 133
Author(s):  
HyungTae Kim ◽  
EungJoo Ha ◽  
KyungChan Jin ◽  
ByungWook Kim
Keyword(s):  
Image Quality ◽  
Light Source ◽  
Light Emitting Diode ◽  
Optical Filters ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Light Emitting ◽  
Simplex Search ◽  
Inspection Systems ◽  
Color Control

A system for inspecting flat panel displays (FPDs) acquires scanning images using multiline charge-coupled device (CCD) cameras and industrial machine vision. Optical filters are currently installed in front of these inspection systems to obtain high-quality images. However, the combination of optical filters required is determined manually and by using empirical methods; this is referred to as passive color control. In this study, active color control is proposed for inspecting FPDs. This inspection scheme requires the scanning of images, which is achieved using a mixed color light source and a mixing algorithm. The light source utilizes high-power light emitting diodes (LEDs) of multiple colors and a communication port to dim their level. Mixed light illuminates an active-matrix organic light-emitting diode (AMOLED) panel after passing through a beam expander and after being shaped into a line beam. The image quality is then evaluated using the Tenenbaum gradient after intensity calibration of the scanning images. The dimming levels are determined using the simplex search method which maximizes the image quality. The color of the light was varied after every scan of an AMOLED panel, and the variation was iterated until the image quality approached a local maximization. The number of scans performed was less than 225, while the number of dimming level combinations was 20484. The proposed method can reduce manual tasks in setting-up inspection machines, and hence is useful for the inspection machines in FPD processes.

Chest Radiography with a Flat-Panel Detector: Image Quality with Dose Reduction after Copper Filtration

Radiology ◽  
2005 ◽  
Vol 237 (2) ◽  
pp. 691-700 ◽  
Author(s):  
Okka W. Hamer ◽  
Claude B. Sirlin ◽  
Michael Strotzer ◽  
Ingitha Borisch ◽  
Niels Zorger ◽  
...  
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Chest Radiography ◽  
Flat Panel ◽  
Flat Panel Detector

Reducing dose in urography while maintaining image quality—a comparison of storage phosphor plates and a flat-panel detector

2005 ◽  
Vol 16 (1) ◽  
pp. 221-226 ◽  
Author(s):  
Margareta Jansson ◽  
Håkan Geijer ◽  
Jan Persliden ◽  
Torbjörn Andersson
Keyword(s):  
Image Quality ◽  
Flat Panel ◽  
Storage Phosphor ◽  
Flat Panel Detector ◽  
Phosphor Plates

Direct-conversion flat-panel X-ray image detectors

2002 ◽  
Vol 149 (2) ◽  
pp. 85-96 ◽  
Author(s):  
S.O. Kasap ◽  
J.A. Rowlands
Keyword(s):  
Direct Conversion ◽  
Flat Panel ◽  
X Ray

Image quality of flat-panel cone beam CT

2003 ◽  
Author(s):  
Georg Rose ◽  
Jens Wiegert ◽  
Dirk Schaefer ◽  
Klaus Fiedler ◽  
Norbert Conrads ◽  
...  
Keyword(s):  
Image Quality ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Flat Panel

Measurement of the electrical properties of a polycrystalline cadmium telluride for direct conversion flat panel x-ray detector

2014 ◽  
Vol 9 (01) ◽  
pp. P01010-P01010 ◽  
Author(s):  
K M Oh ◽  
D K kim ◽  
J W Shin ◽  
S U Heo ◽  
J S Kim ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Cadmium Telluride ◽  
Direct Conversion ◽  
Flat Panel ◽  
X Ray

Performance evaluation of a direct-conversion flat-panel detector system in imaging and quality assurance for a high-dose-rate192Ir source

2018 ◽  
Vol 63 (5) ◽  
pp. 055017 ◽  
Author(s):  
Yoshinori Miyahara ◽  
Yuki Hara ◽  
Hiroto Nakashima ◽  
Tomonori Nishimura ◽  
Kanae Itakura ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Performance Evaluation ◽  
Direct Conversion ◽  
Detector System ◽  
High Dose ◽  
Flat Panel ◽  
Flat Panel Detector

Design and image quality results from volumetric CT with a flat-panel imager

2001 ◽  
Author(s):  
William Ross ◽  
Samit Basu ◽  
Peter M. Edic ◽  
Mark Johnson ◽  
Armin H. Pfoh ◽  
...  
Keyword(s):  
Image Quality ◽  
Flat Panel ◽  
Volumetric Ct

scholarly journals The effect of scatter and glare on image quality in contrast-enhanced breast imaging using an a-Si/CsI(Tl) full-field flat panel detector

2009 ◽  
Vol 36 (3) ◽  
pp. 920-928 ◽  
Author(s):  
Ann-Katherine Carton ◽  
Raymond Acciavatti ◽  
Johnny Kuo ◽  
Andrew D. A. Maidment
Keyword(s):  
Image Quality ◽  
Breast Imaging ◽  
Flat Panel ◽  
Full Field ◽  
Flat Panel Detector ◽  
Contrast Enhanced
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