Measurement of the detective quantum efficiency (DQE) of digital X-ray detectors according to the novel standard IEC 62220-1

Illers, Hartmut; Buhr, E.; Hoeschen, Christoph

doi:10.1093/rpd/nch507

Cited by 54 publications

(34 citation statements)

References 8 publications

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“…Many studies [2][3][4][5][6][7][8][9][10][11][12] have reported largely standardized methods to measure the physical performance of imaging systems based on the International Electrotechnical Commission IEC 62220-1 standard. 4 These studies were based on the metric-the detective quantum efficiency (DQE)-which reflects detector efficiency when forming an image using a limited number of x-ray photons, providing an input signalto-noise ratio (SNR) at a specific exposure level.…”

Section: Introductionmentioning

confidence: 99%

A comparison of digital radiography systems in terms of effective detective quantum efficiency

Bertolini¹,

Nitrosi²,

Rivetti

et al. 2012

Medical Physics

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The authors confirm the robustness and reproducibility of the eDQE method. As expected, the DR systems performed better than the CR systems due to their superior signal-to-noise transfer characteristics. The results of this study suggest the eDQE method may provide an opportunity to more accurately assess the clinical performance of digital radiographic imaging systems by accounting for factors such as the presence of scatter, use of an antiscatter grid, and magnification and focal spot blurring effects, which are not reflected in conventional DQE measures.

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Section: Introductionmentioning

confidence: 99%

A comparison of digital radiography systems in terms of effective detective quantum efficiency

Bertolini¹,

Nitrosi²,

Rivetti

et al. 2012

Medical Physics

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“…Many different methods for measuring DQE have been described in the literature [19,20]. Samei et al [16] described a methodology for measuring eDQE, which estimates system performance in a clinically relevant context.…”

Section: Measurement Of Edqe and Cnr To Specify Test Techniquesmentioning

confidence: 99%

Construction of pediatric homogeneous phantoms for optimization of chest and skull radiographs

Alves

Miranda

Neto

et al. 2015

European Journal of Radiology

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“…The quantum efficiency of the detector (detector quantum efficiency or DQE) is related to how many X-ray photons that strike the detector during the recording cycle (not during the dead time) that are actually counted (Illers et al, 2005). The efficiency of the detector depends on the detector itself (detector efficiency) and the "windows" of the detector that allow X-rays to pass through but keep air and dirt out.…”

Section: Detection Of X-rays: General Concepts and Terminologymentioning

confidence: 99%

Practical Aspects

Reibenspies¹,

Bhuvanesh²

2009

Principles and Applications of Powder Diffraction

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Generation of X-rays: general concepts and terminologyX-rays are produced by the collision of high-velocity electrons with a stationary or rotating metallic target. The most useful X-rays for the home laboratory have energies between 4 and 21 keV, which relates to wavelengths of 3.1-0.59 Å (1 Å = 10 −10 m). X-rays with energy below 4 keV are readily absorbed by air, while X-rays above 21 keV will return condensed powder patterns that can be difficult to interpret.In practice, the metallic target is made of chromium (Cr), cobalt (Co), copper (Cu) or molybdenum (Mo). These metals produce X-rays in the 4-21 keV range while providing stable heat conduction and corrosion resistance. The production of X-rays generates large quantities of heat, which must be dissipated rapidly in order to prevent the metallic targets from melting; therefore, the metals must be durable and conductive to both heat and electricity.The continuous and characteristic spectrum of X-ray radiation is produced when highvelocity electrons strike the metallic target. The continuous spectrum or Bremsstrahlung radiation is produced when the path of the electron that enters the target is altered by interactions with the metal atoms (McCall, 1982). The bending or braking action causes the electrons to lose momentum and release X-ray radiation. The Bremsstrahlung radiation displays a continuous spectrum due to the fact that not every electron will decelerate in a similar manner. The electrons that are completely stopped by the impact will release all of their energy at once, and thus produce the maximum energetic and lowest wavelength X-ray. The energy is thus described by the equation:where λ is in Å (10 −10 m) and V is the applied voltage. If one plots the intensity of the Bremsstrahlung radiation against increasing wavelength, one would etch a curve that begins at λ min and rapidly increases to a maximum of a few tenths of an Angstrom above λ min and then slowly decreases as one proceeds to longer wavelengths. The characteristic spectrum, on the other hand, is composed of sharp intensity maxima at critical wavelengths and is superimposed on the continuous spectrum. These narrow peaks are characteristic of the metal used in the target material and are associated with the Principles and Applications of Powder Diffraction. Edited

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Measurement of the detective quantum efficiency (DQE) of digital X-ray detectors according to the novel standard IEC 62220-1

Cited by 54 publications

References 8 publications

A comparison of digital radiography systems in terms of effective detective quantum efficiency

A comparison of digital radiography systems in terms of effective detective quantum efficiency

Construction of pediatric homogeneous phantoms for optimization of chest and skull radiographs

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