Performance of a Digital Gamma-Imaging System Based Upon CdTe-CMOS Sensor and 75 Se Source for Nondestructive Testing

被引：8

作者：

Cho, H. S. ^{[1
]}

Lee, S. Y. ^{[1
]}

Choi, S. I. ^{[1
]}

Oh, J. E. ^{[1
]}

Cho, H. M. ^{[1
]}

Kim, K. Y. ^{[1
]}

Lee, B. S. ^{[2
]}

Kim, S. ^{[3
]}

机构：

[1] Yonsei Univ, Dept Radiol Sci, Wonju 220710, South Korea

[2] Konkuk Univ, Sch Biomed Engn, Chungju 380701, South Korea

[3] Cheju Natl Univ, Dept Nucl & Energy Engn, Cheju 690756, South Korea

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2008年 / 55卷 / 05期

关键词：

CdTe photodetector; digital gamma imaging; nondestructive testing; (75) Se source;

D O I：

10.1109/TNS.2008.2003356

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

As a continuation of our digital radiographic sensor R&D, we have developed a digital gamma-imaging system based upon the commercially-available CdTe-CMOS sensor (AJAT, SCAN1000) and the (75) Se gamma source (MDS, Gamma Mat (R) SE) for our ongoing application of nondestructive testing. Here the sensor has a 750-mu m-thick CdTe photoconductor as an efficient radiation converter and a CMOS pixel array having 100 x 100 mu m(2) pixel size and 5.4 x 151.0 mm(2) active area, bump-bonded to the photoconductor for signal readout. The source has about 62.8 Ci activity and a physical size of 3.0 mm in diameter. For the first time in this project, we have succeeded in obtaining useful gamma images from the imaging system and evaluated the imaging performance in terms of the resolving power, the line spread function (LSF), the modulation transfer function (MTF), the noise power spectrum (NPS), and the detective quantum efficiency (DQE). For comparison, we also evaluated the image quality by using a microfocus X-ray source (Hamamatsu, L9121-01) having a focal spot size of about 5 mu m.

引用

页码：2716 / 2720

页数：5

共 13 条

[1] An integrated CMOS-selenium x-ray detector for digital mammography [J].

Andre, MP ;

Spivey, B ;

Martin, P ;

Morsell, L ;

Atlas, E ;

Pellegrino, T .

PHYSICS OF MEDICAL IMAGING, 1998, 3336 :204-209

[2] Development of a portable digital radiographic system based on FOP-coupled CMOS image sensor and its performance evaluation [J].

Cho, HS ;

Jeong, MH ;

Han, BS ;

Kim, S ;

Lee, BS ;

Kim, HK ;

Lee, SC .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2005, 52 (05) :1766-1772

[3] CdTe and CdZnTe gamma ray detectors for medical and industrial imaging systems [J].

Eisen, Y ;

Shor, A ;

Mardor, I .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 428 (01) :158-170

[4]

*GAMM MAT SE MDS N, 2006, CAN US MAN GAMMAMAT

[5] CHARGE-COUPLED DEVICE DETECTOR - PERFORMANCE CONSIDERATIONS AND POTENTIAL FOR SMALL-FIELD MAMMOGRAPHIC IMAGING APPLICATIONS [J].

KARELLAS, A ;

HARRIS, LJ ;

LIU, H ;

DAVIS, MA ;

DORSI, CJ .

MEDICAL PHYSICS, 1992, 19 (04) :1015-1023

[6]

*OY AJAT LTD, SCAN 1000

[7]

ROEHRIG H, 1994, P SOC PHOTO-OPT INS, V2163, P320, DOI 10.1117/12.174269

[8] A prototype CCD-based detector for whole breast digital mammography [J].

Rosen, D ;

Phillips, W ;

Stanton, M ;

Xie, JH ;

OMara, D ;

Stewart, A .

PHYSICS OF MEDICAL IMAGING - MEDICAL IMAGING 1997, 1997, 3032 :52-58

[9] An experimental comparison of detector performance for direct and indirect digital radiography systems [J].

Samei, E ;

Flynn, MJ .

MEDICAL PHYSICS, 2003, 30 (04) :608-622

[10]

SCHULMAN T, 2006, THESIS U HELSINKI HE

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