Photostimulable x-ray storage phosphors: a review of present understanding

Seggern, Heinz von

doi:10.1590/s0103-97331999000200008

Cited by 129 publications

(80 citation statements)

References 2 publications

(2 reference statements)

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“…In spite of many efforts to understand the information storage and read-out processes, no complete understanding has yet been achieved (see e.g., [2][3][4][5]). The lower spatial resolution of commercially-used X-ray imaging systems based on BaFBr is partially due to the matlockite structure of the crystallites in the storage phosphor layer.…”

Section: Introductionmentioning

confidence: 99%

Physics and Current Understanding of X-Ray Storage Phosphors

Schweizer

2001

phys. stat. sol. (a)

158

108

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BaFBr doped with Eu 2+ is the most successful X-ray storage phosphor used for digital radiography so far. The mechanisms of information storage and subsequent read-out are, however, not yet fully understood. The present understanding of the structures and reactions of the radiation-induced point defects involved in these processes are critically discussed. The shortcomings of X-ray storage phosphor screens based on BaFBr : Eu 2+ are the inferior spatial resolution compared to conventional X-ray films. Also reviewed are therefore alternative storage phosphors such as alkali halides doped with Eu 2+ , Ga + , In + , or Tl + or elpasolites doped with Ce 3+ or Eu 2+ which are also promising with high figures of merit and potentially higher spatial resolution. A completely new approach is the use of suitably doped glasses and glass ceramics. First results on fluorozirconate glass ceramics with good storage and read-out properties are reviewed.

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Section: Introductionmentioning

confidence: 99%

Physics and Current Understanding of X-Ray Storage Phosphors

Schweizer

2001

phys. stat. sol. (a)

158

108

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“…The feeding of the Eu 2+ persistent luminescence center is similar to the storage phenomena in wide band gap semiconducting materials, e.g. Si doped by Er 3+ [46,47] and in photosimulatcd phosphors [35]. However, further studies utilizing different experimental spectroscopic and other techniques are needed to prove and reveal the details of the proposed mechanism.…”

Section: Mechanism Of Persistent Luminescencementioning

confidence: 81%

“…Together with the photo-stimulated luminescence [35], the persistent luminescence is based on the use oflattice defects for storing the excitation energy. However, in contrast to the phenomenon of photo-stimulated luminescence which has been studied exhaustively and the materials are well established and characterized, the corresponding features of the persistent luminescence are not at all well characterized.…”

Section: Persistent Luminescence Of Mal Z0 4 :Eu Z +mentioning

confidence: 99%

Persistent Luminescence Materials

Aitasalo¹,

Hölsä²,

Krupa³

et al. 2003

Physics of Laser Crystals

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Abstract. The luminescent efficiency of rare earth ions is usually drastically lowered when defects are present in the host lattice. Persistent luminescence is the most recent rare earth application based on lattice defects. Typical materials are the Eu + ions as codopants enhance greatly the duration and intensity of persistent luminescence. As a result of very slow thermal bleaching of the excitation energy from the lattice defects acting as traps, the new persistent luminescent materials yield luminescence still visible to naked eye for more than ten hours. Despite the seemingly simple stoichiometry and structure of these materials, the determination of persistent luminescence mechanism(s) presents a very complicated problem. This report~resents in detail some of the factors affecting the luminescence properties of the Eu +,R 3 + doped MAIz0 4 • The possible mechanisms involved with different defect centers and interactions between them and the emitting Eu 2 + ion are discussed based on the results of systematic investigations carried out on the preparation, composition, structure and different luminescence properties.

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“…CR equipment is very similar to film radiography [1], and as opposed to digital radiograph (DR) uses flexible detectors, which can be bent [2] and used in panoramic exposures very similar to silver film. Another attractive property concerns the very wide exposure range, which makes imaging plates less prone to overexposure and therefore allow a wider wall thickness range to be inspected with the same exposure.…”

Section: Introductionmentioning

confidence: 99%

Simulating radiographic inspections with imaging plates

Yao¹,

Duvauchelle²,

Kaftandjian³

et al. 2016

AIP Conference Proceedings

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Abstract. Computed Radiography (CR) based on photostimulable imaging plates (IP) is a potential replacement technique for traditional silver film radiography. For the inspections of components with high wall thicknesses requiring higher energy sources, however, imaging plate performance suffers from a spectral response which is low for the higher energies and high in the energy range where scattered radiation is typically observed. For these applications, care must be taken to apply appropriate filtering. Simulation tools are expected to be helpful in determining optimal operating conditions. We present a computer model which combines deterministic and Monte Carlo methods to simulate the imaging chain, focusing in particular on the scanner model.

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Photostimulable x-ray storage phosphors: a review of present understanding

Cited by 129 publications

References 2 publications

Physics and Current Understanding of X-Ray Storage Phosphors

Physics and Current Understanding of X-Ray Storage Phosphors

Persistent Luminescence Materials

Simulating radiographic inspections with imaging plates

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