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

doi:10.1109/TNS.2003.817382

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 journal › Article › peer-review

7 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.

Original language	English
Pages (from-to)	1659-1663
Number of pages	5
Journal	IEEE Transactions on Nuclear Science
Volume	50
Issue number	5, Part 2
DOIs	https://doi.org/10.1109/TNS.2003.817382
Publication status	Published - 1 Oct 2003

Keywords

photodiodes
semiconductor device noise
silicon radiation detectors

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10.1109/TNS.2003.817382

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title = "Detective quantum efficiency of the Medipix pixel detector",

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.",

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T1 - Detective quantum efficiency of the Medipix pixel detector

AU - Davidson, DW

AU - Watt, J

AU - Tlustos, L

AU - Mikulec, B

AU - Campbell, M

AU - Mathieson, K

AU - O'Shea, V

AU - Smith, KM

AU - Rahman, M

PY - 2003/10/1

Y1 - 2003/10/1

N2 - 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.

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.

KW - photodiodes

KW - semiconductor device noise

KW - silicon radiation detectors

U2 - 10.1109/TNS.2003.817382

DO - 10.1109/TNS.2003.817382

M3 - Article

SN - 0018-9499

VL - 50

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EP - 1663

JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

IS - 5, Part 2

ER -

Detective quantum efficiency of the Medipix pixel detector

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Keywords

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