Radiation image storage panel
AssigneeFuji Photo Film Co., Ltd.
InventorsKenji Takahashi, Junji Miyahara
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Abstract
A radiation image storage panel having a fluorescent layer which comprises a binder and a stimulable phosphor dispersed therein. Further, the panel has a light-reflecting white pigment layer on one side thereof with respect to the fluorescent layer opposite to the side exposed to the stimulating rays for said stimulable phosphor. The panel provides an image of high sharpness.
Claims56
A radiation image storage panel having a fluorescent layer comprising a binder and a stimulable phosphor dispersed therein upon stimulation by rays having a wavelength ranging from 500 to 800 nm, wherein said phosphor is characterized in that said panel has a light-reflecting white pigment layer on one side thereof with respect to the fluorescent layer opposite to the side exposed to the stimulating rays for said stimulable phosphor and that said phosphor is represented by the following general formula (I) or (II);
- LnOX:aA (I)
- wherein Ln represents an element selected from the group of La, Y, Gd and Lu, X represents an element selected from the group of Cl and Br, A represents an element selected from the group of Ce and TB, and X is a number satisfying the condition of 0<X<0.1;
- (Ba.sub.1-x M.sup.II.sub.x)FX.sub.1 :yA.sub.1 (II)
- wherein M.sup.II represents at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Cd, X.sub.1 represents at least one halogen selected from the group consisting of Cl, Br and I, A.sub.1 represents at least one element selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb and Er, and x and y are numbers satisfying the conditions of 0.ltoreq.x.ltoreq.0.6 and 0.ltoreq.y.ltoreq.0.2.
A process for producing an image by using radiation image storage panel having a fluorescent layer comprising a binder and a stimulable phosphor dispersed therein upon stimulation by rays having a wavelength ranging from 500 to 800 nm, wherein said phosphor is characterized in that said panel has a light-reflecting white pigment layer on one side thereof with respect to the fluorescent layer opposite to the side exposed to the stimulating rays for said stimulable phosphor and that said phosphor is represented by the following general formula (I) or (II);
- LnOX:aA (I)
- wherein Ln represents an element selected from the group of La, Y, Gd and Lu, X represents an element selected from the group of Cl and Br, A represents an element selected from the group of Ce and Tb, and a is a number satisfying the condition of 0<a<0.1;
- (Ba.sub.1-x M.sup.II.sub.x)FX.sub.1 :yA.sub.1 (II)
- wherein M.sup.II represents at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Cd, X.sub.1 represents at least one halogen selected from the group consisting of Cl, Br and I, A.sub.1 represents at least one element selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb and Er, and x and y are numbers satisfying the conditions of 0.ltoreq.x.ltoreq.0.6 and 0.ltoreq.y.ltoreq.0.2,
- said process comprising the steps of (i) causing said panel to absorb a radiation passing through an object (ii) scanning said panel with He-Ne laser beam to sequentially release the radiation energy stored in the stimulable phosphor of the panel as light emission, and (iii) electrically converting the emitted light to a visible image.
Dependencies are inferred from the claim text.