Detective quantum efficiency of the Medipix pixel detector

DW Davidson, J Watt, L Tlustos, B Mikulec, M Campbell, K Mathieson, V O'Shea, KM Smith, M Rahman

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have measured the intrinsic performance of a digital X-ray detector, the Medipix1, by examining the total detective quantum efficiency (DQE). We studied how the DQE depends on both the incident photon energy and spatial frequency. Reported here is the calculation of the detective quantum efficiency for the case of a 300 μm thick silicon diode detector attached to the Medipix1 readout chip. This was done by determining the modulation transfer function and the noise power spectrum; together these allow the frequency component of the DQE to be calculated. The X-ray absorption efficiency in the detector gives the dependence on incident energy. This system was found to have a DQE that peaked at 0.118, using a dental X-ray source, and dropped to 0.049 at the Nyquist frequency of 2.94 line pairs per mm.
LanguageEnglish
Pages1659-1663
Number of pages5
JournalIEEE Transactions on Nuclear Science
Volume50
Issue number5, Part 2
DOIs
Publication statusPublished - 1 Oct 2003

Fingerprint

Quantum efficiency
quantum efficiency
Pixels
pixels
Detectors
detectors
Nyquist frequencies
X rays
x rays
Optical transfer function
X ray absorption
modulation transfer function
noise spectra
Power spectrum
readout
power spectra
Diodes
Photons
diodes
chips

Keywords

  • photodiodes
  • semiconductor device noise
  • silicon radiation detectors

Cite this

Davidson, DW., Watt, J., Tlustos, L., Mikulec, B., Campbell, M., Mathieson, K., ... Rahman, M. (2003). Detective quantum efficiency of the Medipix pixel detector. IEEE Transactions on Nuclear Science, 50(5, Part 2), 1659-1663. https://doi.org/10.1109/TNS.2003.817382
Davidson, DW ; Watt, J ; Tlustos, L ; Mikulec, B ; Campbell, M ; Mathieson, K ; O'Shea, V ; Smith, KM ; Rahman, M. / Detective quantum efficiency of the Medipix pixel detector. In: IEEE Transactions on Nuclear Science. 2003 ; Vol. 50, No. 5, Part 2. pp. 1659-1663.
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Davidson, DW, Watt, J, Tlustos, L, Mikulec, B, Campbell, M, Mathieson, K, O'Shea, V, Smith, KM & Rahman, M 2003, 'Detective quantum efficiency of the Medipix pixel detector' IEEE Transactions on Nuclear Science, vol. 50, no. 5, Part 2, pp. 1659-1663. https://doi.org/10.1109/TNS.2003.817382

Detective quantum efficiency of the Medipix pixel detector. / Davidson, DW; Watt, J; Tlustos, L; Mikulec, B; Campbell, M; Mathieson, K; O'Shea, V; Smith, KM; Rahman, M.

In: IEEE Transactions on Nuclear Science, Vol. 50, No. 5, Part 2, 01.10.2003, p. 1659-1663.

Research output: Contribution to journalArticle

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AB - We have measured the intrinsic performance of a digital X-ray detector, the Medipix1, by examining the total detective quantum efficiency (DQE). We studied how the DQE depends on both the incident photon energy and spatial frequency. Reported here is the calculation of the detective quantum efficiency for the case of a 300 μm thick silicon diode detector attached to the Medipix1 readout chip. This was done by determining the modulation transfer function and the noise power spectrum; together these allow the frequency component of the DQE to be calculated. The X-ray absorption efficiency in the detector gives the dependence on incident energy. This system was found to have a DQE that peaked at 0.118, using a dental X-ray source, and dropped to 0.049 at the Nyquist frequency of 2.94 line pairs per mm.

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Davidson DW, Watt J, Tlustos L, Mikulec B, Campbell M, Mathieson K et al. Detective quantum efficiency of the Medipix pixel detector. IEEE Transactions on Nuclear Science. 2003 Oct 1;50(5, Part 2):1659-1663. https://doi.org/10.1109/TNS.2003.817382