摘要:
In a method for producing a binderless Eu-doped CsBr-type storage phosphor screen from a combination of phosphor precursors in order to prepare a CsBr:Eu storage phosphor by vacuum depositing said CsBr:Eu phosphor on a substrate, wherein during a vacuum depositing step said substrate is kept at a temperature T, such that 50 °C ≤ T ≤ 300 °C and wherein said vacuum deposition proceeds in an Ar-atmosphere with an Ar-pressure of at most 3 Pa; during or after at least one of the said steps a radiation exposure treatment is given with energy from radiation sources emitting short ultraviolet radiation in the range from 150 nm to 300 nm with an energy of at least 10 mJ/mm 2 .
摘要:
A method and apparatus for correcting a signal representation of a radiation image of an object wherein correction by means of correction values is performed simultaneously with image read out. Said signal representation is for example read out from a photostimulable phosphor screen, whereby correction values are obtained by flat field exposure, and whereby the correction values can be used in a low-pass filtered and/or in an undersampled manner.
摘要:
A phosphor panel with a protective coating divided in at least two layers: a layer A, being closest to said phosphor layer and a layer B farther away from said phosphor layer wherein the layer A has a lower water vapour permeability coefficient than the layer B, in that said layer A has a water vapour permeability coefficient, P, so that 0 ≤ P ≤ 1 x 10 -11 cm 3 (STP) .cm cm 2 .s.Pa .
摘要:
A method for monitoring a dose of penetrating radiation absorbed by an object, comprising 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 in 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 pre-defined threshold value for obtaining a difference value, and displaying the difference value on a decentralised display.
摘要:
A radiation image storage screen is provided comprising an alkali metal phosphor wherein the dopant is selected from the group consisting of Ga , Ge , Sn , Sb and As . In a preferred embodiment the alkali metal is Cs and/or Rb.
摘要:
A radiation image storage screen is provided comprising an alkali metal phosphor wherein the dopant is selected from the group consisting of Ga 1+ , Ge 2+ , Sn 2+ , Sb 3+ and As 3+ . In a preferred embodiment the alkali metal is Cs and/or Rb.
摘要:
An optical memory plate as a data storage optical medium, particularly suitable for identification purposes or protection against forgery and counterfeiting, by providing radiation inscription of data and read-out of thus stored inscription data, as well as a method of recording (with either X-rays or ultraviolet rays) and reading out said data has been disclosed, characterised in that said optical memory comprises a europium doped alkali metal halide storage phosphor layer, substantially free of alkaline earth metals.
摘要:
A Eu-doped CsBr-type storage phosphor screen or panel has been disclosed, providing ratios of ultraviolet luminescence intensities of at least 10/9 after having been exposed to radiation having a wavelength in the range from 150 to 400 nm , measured at same sites without and with pretreatment exposure of said storage phosphor screen or panel with short ultraviolet radiation in the range from 150 to 300 nm and having an energy of 10 mJ/mm 2 , as well as a method of producing a stimulable phosphor screen or panel, characterised in that during or after at least one of the manufacturing steps a radiation exposure treatment is given with radiation sources emitting short ultraviolet radiation in the range from 150 to 300 nm with an energy of at least 10 mJ/mm 2 .
摘要翻译:已经公开了Eu掺杂的CsBr型存储荧光屏或面板,其在暴露于波长在150至400nm的辐射之后提供至少10/9的紫外发光强度的比率,在相同位置 所述存储荧光屏或具有150nm至300nm的短紫外辐射和具有10mJ / mm 2的能量的面板的预处理曝光以及产生可刺激荧光屏或面板的方法 其特征在于,在所述制造步骤中的至少一个之后或之后,以150至300nm的范围内发射短紫外辐射的辐射源以至少10mJ / mm 2的能量给予辐射曝光处理。
摘要:
A method of preparing a phosphor screen having at least a substrate and a phosphor layer comprising a CsX:Eu 2+ phosphor wherein X represents a halide selected from a group consisting of Br and Cl and wherein the phosphor is deposited by physical vapour deposition on the substrate. During deposition the substrate is at a temperature in the range of 135°C to 235°C and variation of the temperature of the substrate occurring during the deposition process is not more than 50°C.
摘要:
A binderless stimulable phosphor screen comprising a phosphor layer with needle-shaped phosphor crystals on a support absorbing at least 30 % of the stimulating light and reflecting at least 60 % of the stimulated light. The support can be a PET support including a mixture of blue and white pigments.