Browse > Article
http://dx.doi.org/10.4313/TEEM.2002.3.4.016

Zinc Sulfide-selenium X-ray Detector for Digital Radiography  

Park, Ji-Koon (Department of Biomedical Engineering, College of Biomedical Science and Engineering, Inje University)
Kang, Sang-Sik (Department of Biomedical Engineering, College of Biomedical Science and Engineering, Inje University)
Kim, Jae-Hyung (Medical imaging Research Center, Inje University)
Mun, Chi-Woong (Medical imaging Research Center, Inje University)
Nam, Sang-Hee (Medical imaging Research Center, Inje University)
Publication Information
Transactions on Electrical and Electronic Materials / v.3, no.4, 2002 , pp. 16-20 More about this Journal
Abstract
The high bias voltage associated with the thick layer (typically 500-1000 ㎛) of selenium required to have an acceptable x-ray absorption in radiography and fluoroscopy applications may have some practical inconvenience. A hybrid x-ray detector with zinc sulfide-amorphous selenium structure has been developed to improve the x-ray sensitivity of a a-Se based flat-panel digital imaging detector. Photoluminescence(PL) characteristic of a ZnS:Ag phosphor layer showed a light emission peak centered at about 450 nm, which matches the sensitivity spectrum of selenium. The dark current of the hybrid detector showed similar characteristics with that of a a-Se detector. The x-ray sensitivity of hybrid and a-Se x-ray detector was 345 pC/㎠/mR and 295 pC/㎠/mR at an applied voltage of 10 V/㎛, respectively. The purpose of this study was to evaluate the pertinence of a solution using a thin selenium layer, as a photosensitive converter, with a thick coating of silver doped zinc sulfide phosphor.
Keywords
Amorphous selenium; Hybrid x-ray detector; Dark current; X-ray sensitivity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 H. J. Lee, K. T. Lee, S. G. Park, U. S. Park, and H. J.Kim, 'Electrical and leakage current characteristic of high temperature polycrystalline silicon thin filmtransistor', J. of KIEEME(in Korean), Vol. 11, No.10,p.918,1998
2 Alain Jean. Luc Laperriere, Anne Legros, HabitMani, Ziad Shukri, and Henri Rougeot, 'Newcesium iodide-selenium x-ray detector structure fordigital radiography and fluoroscopy', Proc. of SPIE,Vol. 3659, p. 298, 1999   DOI
3 H. Hermon, M. Schieber, A. Zuck, A. Vilensky, L.Melehov, E. Shtekel, A. Green, O. Dagan, S.E.Ready, R.A. Street, E. S. Seppi, R. Pavlyuchkova, GVirshuP, G. Zentai, and L. Partain, 'Deposition of thick films of polycrystalline mercuric iodide x-raydetectors, Proc. of SPIE, Vol. 4320, p. 133, 2001   DOI
4 S.-S. Kang, J.-H. Kim, H.-W. Lee, C.-W. Mun, and S.-H. Nam, 'X-ray response characteristic of Zn inthe polycrystalline Cd_1_-_XZn_XTe detector for digitalradiography', Trans. on EEM, Vol. 3, No 2, p. 28,2002
5 Wei Zhao and J. A. Rowlands, 'X-ray imaging using amorphous selenium: feasibility of a flatpanel self-scanned detector for digital radiology',Med. Phys., Vol. 22, p. 1595, 1995   DOI   ScienceOn
6 A. S. Diamond, 'Handbook of Imaging Materials'Marcel Deker, p. 352, 1991
7 H. H. Kim, M. J. Cho, W. J. Choi, J. G. Lee, and KJ. Lim, 'Figure of merit for deposition conditions in ITO films', Trans. on EEM, Vol. 3, No 2, P. 6, 2002
8 G. F. Knoll, 'Radiation detection and measurement', John Wiley & Sons, Inc., p. 368, 2000
9 S. O. Kasap and J. A. Rowlands, 'Photoconductorselection for digital flat panel x-ray imagingdetectors based on the dark current', J. Vac. Sci.Technol. A, Vol. 18, No. 2, P. 615, 2000   DOI   ScienceOn
10 J. A. Rowlands and D. M. Hunter, 'X-ray imagingusing amorphous selenium: Photoinduced discharge(PID) readout methods for digital general radiography', Med. Phys., Vol. 18, p. 1983, 1995
11 W. Que, and J. A. Rowlands. 'X-ray imaging usingamorphous selenium: inherent spatial resolution',Med. Phys., Vol. 22, No. 4, p. 365, 1995   DOI   ScienceOn
12 Wei Zhao, J. A. Rowlands, W. G. Ji, and A. Debrie,'Imaging performance of amorphous seleniumbased flat=panel detector for digital mammography', proc. of SPIE, Vol. 4320, p. 536,2001   DOI
13 S. Tokuda, S.Adachi, T. Sato, T. Yoshimura, H.Nagata, K. Uehara, Y. Izumi, O. Teranuma, and S.Yamada, 'Experimental evaluation of a novel CdZnTe flat-panel X-ray detector for digitalradiography and fluroscopy', proc. of SPIE, Vol.4320,p. 140,2001   DOI