Digital radiography — a review of detector design

Harrison, R. M.

doi:10.1016/0168-9002(91)90995-3

Cited by 29 publications

(9 citation statements)

References 28 publications

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“…The developed detector may have several important advantages over the other X-ray imaging devices. For example, in contrast to the 2D medical imaging detectors (see for example [1], [10]) it operates in photon counting mode, much less sensitive to the scattered x-ray photons (due to the strong X-ray collimation) and certainly should be much cheaper. We also expect that our hybrid detector will be cheaper than the scanning systems based on linear matrix of the scintillators [2] or solid-state detectors [1].…”

Section: Resultsmentioning

confidence: 99%

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A high position resolution X-ray detector: an "Edge on" illuminated capillary plate combined with a gas amplification structure

Iacobaeus

Francke

Lund‐Jensen

et al. 2006

IEEE Trans. Nucl. Sci.

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Abstract-We have developed and successfully tested a prototype of a new high position resolution hybrid X-ray detector. It contains a thin-wall lead glass capillary plate converter of X-rays combined with a microgap parallel-plate avalanche chamber operating in various gas mixtures at 1 atm.The operation of these converters was studied in a wide range of X-ray energies (from 6 to 60 keV) at incident angles varying from 0-90 . The detection efficiency, depending on the geometry, photon's energy, incident angle and the mode of operation was between 5-30% in single step mode and up to 50% in a multi-layered combination. Depending on the capillary's geometry, the position resolution achieved was between 50-250 m in digital form and was practically independent of the photon's energy or gas mixture. The usual lead glass capillary plates operated without noticeable charging up effects at counting rates of 50 Hz/mm 2 and hydrogen treated capillaries-up to 10 5 Hz/mm 2 . The developed detector has several important potential advantages over the exciting X-ray detectors and may open new possibilities for medical imaging, for example in mammography, portal imaging, radiography (including security devices), as well as many other applications.

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Section: Resultsmentioning

confidence: 99%

“…For this reason most of the existing detectors filled with gases at pressures of 10 atm and more operate in ionization chamber modes only. But even at these pressures the position resolution is limited (typically by 200-300 m) due to the electron diffusion, X-ray fluorescent photons and several other effects (see for example [10] and references therein).…”

mentioning

confidence: 99%

A high position resolution X-ray detector: an "Edge on" illuminated capillary plate combined with a gas amplification structure

Iacobaeus

Francke

Lund‐Jensen

et al. 2006

IEEE Trans. Nucl. Sci.

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“…Radiation absorption due to fundamental processes of radiation scattering depend on the detector design and the choice of radiation sources. The conventional design with X-ray tubes usually used metal filters (Harrison, 1991). We use the ZnSe detector instead of a metal filter.…”

Section: Physical Principles Of Dual-energy Ctmentioning

confidence: 99%

“…The signals are detected in synchronization with application of different voltages onto the X-ray tube. Harrison (1991) presented a dual-energy tomography results obtained with energy separation ensured by a certain energy selectivity of the detectors. The method consisted in the use of the low-energy detector (LED) of gadolinium oxysulphide placed before the emitter, and the high-energy detector (HED) of CsI(Tl)-behind it.…”

Section: Introductionmentioning

confidence: 98%

Scintillation materials and detectors on their base for non-destructive two energy testing

Ryzhikov

Grynyov

Opolonin

et al. 2007

Radiation Measurements

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“…Methods of energy separation depend upon the detector design and the choice of radiation sources. In a classical design with X-ray tubes, metal filters are used [4]. In new developments, the role of a filter may be played by a lowenergy detector array (e.g., based on zinc selenide).…”

Section: Physical Principlesmentioning

confidence: 99%

Multi-energy ZnSe-based radiography against terrorism: theory and experiments

Naydenov¹,

Ryzhikov²,

Smith³

et al. 2006

SPIE Proceedings

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Abstract--Multi-energy radiography is a new direction in nondestructive testing. Its specific feature is separate detection of penetrating radiation in several energy channels. Multi-energy radiography allows quantitative determination of the atomic composition of objects. This is its principal advantage over conventional radiography. In particular, dual-energy radiography allows determination of the effective atomic number of a material with an accuracy of up to 80-90%. Development of three-energy radiography and radiography of higher multiplicity makes it possible to further improve the reconstruction of an object's chemical composition. This presents the possibility, for example, of detection of explosives and other illegal objects in luggage with a reliability approaching 100%. These developments can find application not only in anti-terrorist activities, but also in areas such as industrial testing and nuclear medicine.

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Digital radiography — a review of detector design

Cited by 29 publications

References 28 publications

A high position resolution X-ray detector: an "Edge on" illuminated capillary plate combined with a gas amplification structure

A high position resolution X-ray detector: an "Edge on" illuminated capillary plate combined with a gas amplification structure

Scintillation materials and detectors on their base for non-destructive two energy testing

Multi-energy ZnSe-based radiography against terrorism: theory and experiments

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