On the response of a europium doped phosphor-coated CMOS digital imaging detector

被引：33
|
作者：
Seferis, I. E. [1 ]
Michail, C. M. [2 ]
Valais, I. G. [2 ]
Fountos, G. P. [2 ]
Kalyvas, N. I. [2 ]
Stromatia, F. [3 ]
Oikonomou, G. [4 ]
Kandarakis, I. S. [2 ]
Panayiotakis, G. S. [1 ]
机构：
[1] Univ Patras, Fac Med, Dept Phys Med, Patras 26500, Greece
[2] TEI Athens, Dept Med Instruments Technol, Athens 12210, Greece
[3] IASO, Gen Hosp, Dept Radiol & Nucl Med, Holargos 15562, Greece
[4] TEI, Fac Hlth & Caring Profess, Dept Med Radiol Technol, Athens 12210, Greece
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2013年 / 729卷
关键词：
CMOS detector; Image quality; Scintillating detectors; LIGHT-EMISSION EFFICIENCY; X-RAY-DETECTOR; QUANTUM EFFICIENCY; PRESAMPLED MTF; SYSTEM; SCINTILLATOR; PERFORMANCE; CCD; MAMMOGRAPHY; RADIOGRAPHY;
D O I：
10.1016/j.nima.2013.06.107
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Purpose: The purpose of the present study was to assess the information content of a high resolution active pixel CMOS imaging sensor coupled to Gd2O2S:Eu phosphor screens in terms of single index image quality metrics such as the information capacity (IC) and the noise equivalent passband (Ne). Methods: The CMOS sensor was coupled Lo Lwo Gd2O2S:Eu scintillaLor screens with coaling thicknesses of 33.3 and 65.1 mg/cm(2) IC and Ne were obtained by means of experimentally determined parameters such as the modulation transfer function (MTE), the detective quantum efficiency (DQE) and the noise equivalent quanta (NEQ). Measurements were performed using the standard IEC-RQA5 radiation beam quality (70 kVp) and a W/Rh beam quality (28 kVp). Results: lt was found that the detector response function was linear for the exposure ranges under investigation. AL 70 kVp, under the RQA 5 conditions IC values were found Lo range between 1730 and 1851 bitsimm(2) and Ne values were found between 2.28 and 2.52 mm(-1). At 28 kVp the corresponding IC values were found to range between 2535 and 2747 bitsimm(2), while the Ne values were found between 5.91 and 7.09 mm(-1). Conclusion: IC and Ne of the red emitting phosphor/CMOS sensor combination were found with high values suggesting an acceptable imaging performance in teL of information content and sharpness, for X-ray digital imaging. (C) 2013 Elsevier B.V. All rights reserved
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页码：307 / 315
页数：9
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