Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Performance Evaluation of a Selenium(a-Se) Based Prototype Digital Radiation Detector

비정질 셀레늄 기반 디지털 방사선 검출기의 성능 평가

  • 박지군 ((주)리스템 R&D 센터) ;
  • 강상식 ((재)김해시 차세대 의생명융합산업지원센터) ;
  • 조성호 (인제대학교 의용공학과) ;
  • 신정욱 (인제대학교 의용공학과) ;
  • 김소영 (인제대학교 의용공학과) ;
  • 손대응 (인제대학교 의료영상과학대학원) ;
  • 남상희 (인제대학교 의료영상연구소)
  • Published : 2007.04.30
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Abstract

In this study, we have studied the fabrication and the performance evaluation of digital radiation detector of the based on selenium (a-Se) prototype which is widely researched about recently. The detector was fabricated using amorphous selenium in the specification of active area size $7{\times}8.5"$, pixel pitch $139{\mu}m$, and 12 bit ADC. In order for the performance evaluation of the fabricated detector, we used radiation quality RQA 5 that is suggested by the International Electrotechnical Commission (IEC), and evaluated modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE). Concerning MTF measurement, we used slit camera (Nuclear Associates, Model : 07-624-2222), and evaluated in the slit method. Also so as to compare the performance evaluation on the detector fabricated in this study, we used Hologic Direct-Ray (DR-1000) and GE Revolution XQ/I system, and evaluated and compared in the same method MTF, NPS, and DQE which are image quality factors. And as a result, the MTF of each detector In Nyquist frequency were evaluated to be 58% (at 3.5 lp/mm) in the case of DR-1000 and 65% (at 2.5 lp/mm) in the case of XQ/I, and that for the detector fabricated in this study was evaluated to be 36% (at 3.51 lp/mm). Also in the case of DQE(0), the detector fabricated in this study, DR-1000 of Hologic company, and XQ/I system of GE company respectively were evaluated as 36%, 32%, and 50%.

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References

  1. Zhao Wand Rowlands J.A., 'X-ray imaging using amorphous selenium: Feasibility of a flat panel self-scanned detector for digital radiology,' Med. Phys., vol. 22, pp.1595, 1995 https://doi.org/10.1118/1.597628
  2. Tsukamoto A., Yamada S., Tomisaki T., Tanaka M., Sakaguchi T., Asahina H., and Nishiki M., 'Development of a selenium based flat-panel detector for real-time radiography and fluoroscopy,' Soc. Opt. Eng., SPIE, vol. 3336, pp.388-395, 1998
  3. Hunt D.C., Zhao W., and Rowlands I.A., 'Detective quantum efficiency of direct, flat panel X-ray imaging detectors for fluoroscopy,' Soc. Opt. Eng., SPIE, vol. 3336, pp.408-417, 1998
  4. James T. Dobbins III, Handbook of Medical Imaging, vol.1, Chap 3, SPIE press
  5. IEC6220-1 :Medical Electrical Equipment-Characteristics of Digital X-ray Imaging Devices-Part 1:Determination of the Detective Quantum Efficiency(International Electrotechnical Commission, Geneva, Switzerland, 2003
  6. J.T. Dobbins III, D.L. Ergun, L. Rutz, D.A. Hinshaw, H. Blume, D.C. Clark, 'DQE(f) of four generations of computed radiography acquisition devices,' Med. Phys., vol. 22, pp.158l-1593, 1995
  7. Ikuo Kawashita et al. 'Development of an automated method for evaluation of sharpness of digital radiographs using edge method,' Physics of Medical Imaging, vol. 4320, pp.331-338, 2001
  8. H. Fujita, D.Y. Tsai, T. Itoh, K. Doi, J. Morishita, K. Ueda, and A. Ohtsuka, 'A simple method for determining the modulation transfer function in digital radiography,' IEEE Trans., Med. Imaging, vol. 11, pp.34-39, 1992 https://doi.org/10.1109/42.126908
  9. John M. Boone, Thomas R. Fewell, Robert J. Jennings, 'Molybdenum, rhodium, and tungsten anode spectral models using interpolating polynomials with application to mammography,' Med. Phys., vol. 24, no. 12, pp.1863-1874, 1997 https://doi.org/10.1118/1.598100
  10. P. R. Granfors and R. Aufrichtig, 'Performance of a $41{\times}41-cm^2$ amorphous silicon flat panel x-ray detector for radiographic imaging applications,' Med. Phys., vol. 27, pp.1324-1331, 2000 https://doi.org/10.1118/1.599010
  11. P.R. Granfors and R. Aufrichtig, 'DQE(f) of an amorphous silicon flat panel x-ray detector,' Physics of Medical Imaging, SPIE, vol. 3977, pp.2-13, 2000
  12. Wei Zhao, W.G. Ji, J.A. Rowlands and Anne Debrie, 'Investigation of imaging performance of amorphous selenium flat-panel detectors for digital mammography,' Physics of Medical Imaging, SPIE, vol. 4320, pp.536-546, 2001
  13. E.Samei and M.J.Flynn, 'An experimental comparison of detector performance for direct and indirect digital radiography system,' Med. Phys., vol. 30, pp.608-622, 2003 https://doi.org/10.1118/1.1561285
  14. P.Monnin, D.Gutieerez et,. 'Performance comparison of an active matrix flat panel imager, computed radiagraphy system, and a screen-film system at four standard radiation qualities,' Med. Phys., vol. 32, pp.343-350, 2005 https://doi.org/10.1118/1.1843451