Agfa Gevaert Nv

Agfa-gevaert

Other

Peter M Willems

Paul Leblans

Luc A Struye

Freddy Henderickx

Johann-Martin Spaeth

Gino L De Rycke

Jean-Fran&ccedil;ois Gervais

Marcel J Monbaliu

Piet Dewaele

Ann L Verbeeck

Marc Cresens

Raymond L Florens

Pascal F Meeus

Romain H Bollen

Lodewijk M Neyens

Pieter Perdieus

Andrew Edgar

Freddy Hendrickx

Uwe Ewert

Yener Onel

Bart Vaessen

Stefan Schweizer

Carsten Dietze

Thomas Hangleiter

Thomas Pawlik

A photostimulable phosphor screen including a photostimulable phosphor and a transparent outermost layer with a thickness, d, larger than 150 &mgr;m for providing enhanced sharpness of an image obtained in portions with a higher spatial frequency than 2 line pairs per mm by applying a method for reading a radiation image stored in a photostimulable storage phosphor screen with a thick transparent outermost layer when the screen is stimulated through the transparent outermost layer and the stimulated light is read through the transparent outermost layer.

Storage phosphor screen with thick outermost layer and a method for using the same

A device in form of a practical and reusable card for personal monitoring of incident penetrating radiation energy and for reading said energy comprising a stimulable phosphor absorbing and storing said energy and being stimulable with a wavelength &lgr; ; an electroluminescent phosphor emitting, upon application of an electrical field, stimulation light with wavelength &lgr; , said wavelength &lgr; being different from the said incident penetrating radiation, and wherein said device is equipped with means in order to apply an electrical field on said electroluminescent phosphor and wherein said stimulable phosphor and said electroluminescent phosphor are positioned relative to each other so that said light emitted by said electroluminescent phosphor reaches said stimulable phosphor for stimulating said phosphor in order to release stimulated light.

Refusable personal monitoring device

A device built-in in a housing and capable to determine a pressure force in a quantitative way has been provided, the device including a storage phosphor panel or plate having storage phosphors essentially having tribostimulable properties, thereby providing energy conversion of the phosphors by means of pressure force or pressure energy to be determined. The method of measuring the pressure energy has also been described.

Devices equipped with tribostimulable storage phosphors

A method for monitoring a dose of penetrating radiation absorbed by an object, including the steps of providing the object with a device for absorbing penetrating radiation, including a storage phosphor for storing energy from the penetrating radiation; at predetermined intervals, coupling the storage phosphor to a source of stimulation light in such a way that the stimulation light impinges on the phosphor; activating the source of stimulation light so as to cause the storage phosphor to emit an amount of fluorescent light in proportion to an amount of stored energy; reading the amount of fluorescent light and converting it into an electric signal value; storing electric signal value(s) obtained at the predetermined intervals and processing them so as to evaluate a total amount of radiation absorbed by the object; comparing the total amount with a predefined threshold value for obtaining a difference value; and displaying the difference value on a decentralized display.

Method for monitoring a dose of penetrating radiation absorbed by an object

A method has been provided of image formation, dosimetry or personal monitoring wherein said method comprises the steps of (a) storing energy in stimulable phosphors coated in one or more layers of said screen or panel; (b) converting said energy to emission energy and (c) detecting said energy, characterized in that said converting step proceeds by means of a source of pressure energy.

Method of image formation, dosimetry and personal monitoring

A method for recording and reproducing a radiation image including the steps of (1) causing a radiation image storage panel containing a photostimulable phosphor to absorb penetrating radiation having passed through an object or having been radiated from an object, (2) exposing the image storage panel to stimulating rays to release the radiation energy stored therein as light emission and (3) detecting the emitted light, wherein the stimulating rays are emitted by an electroliuminescent element.

Method for recording and reproducing images made by penetrating radiation using electroluminescent elements

A digital representation of a radiation image of an at least partially tubular object is obtained. An attenuation profile over a tangentially imaged wall of the object is taken from the digital image on a straight line. The attenuation profile is reflected in the direction of the center of the object and the attenuation profile is reconstructed to form a relative density distribution by means of a transmission tomography-projection reconstruction method in which the measured reflected attenuation profile is used for all record annular positions.

Method for measuring the wall thickness of a tubular object

A glass ceramic material for storing energy of X-rays and releasing said energy by photo-stimulation comprising a fluoride glass matrix containing micro-crystalline particles, said particles having an average particle size, d, so that d<2 &mgr;m and said glass ceramic shows in a XRD spectrum a continuous spectrum of said glass matrix and discrete peaks superimposed on said continuous spectrum. Said glass matrix contains preferably zirconium ions and ions selected from the group consisting of alkali ions and alkaline earth ions, at least 5 mole % of the fluoride ions is replaced by bromide and/or chloride ions and at least 0.01 mole % of cations selected from the group consisting of transition metal ions, rare earth metal ions, In , Ga , Tl , and Pb is present.

Fluoro glass ceramic showing photostimulable properties

Method to determine in a quantitative way stored amounts of radiation energy making use therefor from a personal monitor storing absorbed incident radiation energy in a storage phosphor panel storing radiation energy originating from radiation having a wavelength of 350 nm or less, wherein the panel is covered with an optical filter absorbing radiation having a wavelength of 350 nm or more during exposure and present in a housing, and from an apparatus for readout of the storage phosphor panel by the steps of entering the personal monitor in a read-out apparatus, removing optical filter covering the storage phosphor panel, adding stimulating energy to the storage phosphor panel, digitally detecting energy released from the storage phosphor panel by a detector and erasing stored rest energy.

Reusable personal sun-monitor

Class of high energy detecting phosphors

A method for checking whether an article has been inspected by penetrating radiation is described, wherein the article is provided with a heat stimulable storage phosphor whereby penetrating radiation leaves a human- or machine-readable semi-permanent or permanent mark. The article is irradiated in order that both the article and the stimulable storage phosphor are irradiated. The article is checked by heating the storage phosphor, releasing flourescent light and detecting the flourescent light by human eye.

Label for certifying an inspection by penetrating radiation

A method of obtaining an electrical representation of a radiation image by means of at least one CCD sensor. A stimulable phosphor plate, the area of which is divided into at least two different portions, is exposed to a radiation image. Each of the portions is stimulated by light guided from a light source, the light having a wavelength within the stimulating wavelength range of the phosphor on the plate and causing the phosphor plate to emit stimulated light. The stimulated light from each phosphor plate portion is guided to at least one two-dimensional CCD sensor kept in a static position relative to the phosphor plate portion, such that the CCD detects the stimulated light. The detected stimulated light is converted into an electrical representation of the plate portion, and the electrical representation of each of the different plate portions is combined to form an electrical representation of the radiation image. When using fiber optics a high readout efficiency can be obtained using a broad range of light sources in continuous or pulsed mode.

Method for obtaining an electrical representation of a radiation image

A label is provided, comprising a means wherein penetrating radiation leaves a human- or machine-readable semi-permanent or permanent mark. Preferably said means is a storage phosphor. A method for using such a label for checking if an articles has been inspected by penetrating radiation and a method for using such a label as personal monitoring are also provided.

A method for reading an electron beam image that has been stored in a photostimulable phosphor screen wherein the photostimulable phosphor screen is scanned with stimulating radiation and wherein light emitted upon stimulation is converted in to a digital image signal. Enhanced sensitivity is obtained by heating the screen in between exposure to the electron beam image and stimulation of the screen.

Electron beam image recording and reproduction method

A method is disclosed of hardener-free processing a forehardened silver halide photographic material comprising a film support and on one or both sides thereof at least one silver halide emulsion layer characterized in that

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Stekene, Belgium

Peter M Willems