US4926047A
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Radiation image recording and reproducing method and radiation image storage panel employed for the same
Assignee: Fujifilm Holdings Corp
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Filing: 1987-10-15
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Granted: 1990-05-15
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Expires: 2007-10-15
Abstract
Abstract A radiation image recording and reproducing method comprising steps of: causing a stimulable phosphor to absorb a radiation having passed through an object or radiated by an object, exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-800 nm to release the radiation energy stored therein as light emission, and detecting the emitted light, in which said stimulable phosphor is a divalent europium activated complex halide phosphor having the formula (I): M.sup.II FX.aM.sup.I X'.bM'.sup.II X".sub.2.cM.sup.III X'" 3 .xA:yEu 2+ (I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M I is a least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M' II is at least one divalent metal selected from the group consisting of Be and Mg; M III is at least one trivalent metal selected from the group consisting of Al, Ga, In and Tl; A is at least one metal oxide; X is at least one halogen selected from the group consisting of Cl, Br and I; each of X', X" and X'" is at least one halogen selected from the group consisting of F, Cl, Br and I; a, b and c are numbers satisfying the conditions of 0≦a≦2, 0≦b≦10 -2 , 0≦c≦10 -2 and a+b+c≧10 -6 ; and x and y are numbers satifying the conditions of 0<x≦0.5 and 0<y≦0.2, respectively. A radiation image storage panel employed for the method is also disclosed.
Inventors
- 👤 Kenji Takahashi
- 👤 Takashi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7729; C09K11/7731; C09K11/7734; C09K11/77342; G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
239 words
A radiation image recording and reproducing method comprising steps of causing a stimulable phosphor to absorb a radiation having passed through an object or radiated by an object, exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-800 nm to release the radiation energy stored therein as light emission, and detecting the emitted light, in which said stimulable phosphor is a divalent europium activated complex halide phosphor having the formula (I): M.sup.II FX.aM.sup.I X'.bM'.sup.II X".sub.2.cM.sup.III X"'.sub.3.xA:yEu.sup.2+ (I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M' II is at least one divalent metal selected from the group consisting of Be and Mg; M III is at least one trivalent metal selected from the group consisting of Al, Ga, In and Tl; A is at least one metal oxide; X is at least one halogen selected from the group consisting of Cl, Br and I; each of X', X" and X"' is at least one halogen selected from the group consisting of F, Cl, Br and I; a, b and c are numbers satisfying the conditions of 0≦a≦2, 0≦b≦10 -2 , 0≦c≦10 -2 and a+b+c≧10 -6 ; and x and y are numbers satisfying the conditions of 0<x≦0.5 and 0<y≦0.2, respectively.
Claim 2
Dependent Claim
239 words
A radiation image recording and reproducing method comprising steps of causing a stimulable phosphor to absorb a radiation having passed through an object or radiated by an object, exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-800 nm to release the radiation energy stored therein as light emission, and detecting the emitted light, in which said stimulable phosphor is a divalent europium activated complex halide phosphor having the formula (I): M.sup.II FX.aM.sup.I X'.bM'.sup.II X".sub.2.cM.sup.III X"'.sub.3.xA:yEu.sup.2+ (I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M' II is at least one divalent metal selected from the group consisting of Be and Mg; M III is at least one trivalent metal selected from the group consisting of Al, Ga, In and Tl; A is at least one metal oxide; X is at least one halogen selected from the group consisting of Cl, Br and I; each of X', X" and X"' is at least one halogen selected from the group consisting of F, Cl, Br and I; a, b and c are numbers satisfying the conditions of 0≦a≦2, 0≦b≦10 -2 , 0≦c≦10 -2 and a+b+c≧10 -6 ; and x and y are numbers satisfying the conditions of 0<x≦0.5 and 0<y≦0.2, respectively.
Claim 3
Dependent Claim
26 words
The radiation image recording and reproducing method as claimed in claim 1, in which each of X', X" and X"' in the formula (I) is Br.
Claim 4
Dependent Claim
24 words
The radiation image recording and reproducing method as claimed in claim 1 or 2, in which M I in the formula (I) is Na.
Claim 5
Dependent Claim
41 words
The radiation image recording and reproducing method as claimed in claims 1 or 2, in which a, b and c in the formula (I) are numbers satisfying the conditions of 10 -5 ≦a≦0.5, 0≦b≦10 -3 , and 0≦c≦10 3 , respectively.
Claim 6
Dependent Claim
41 words
The radiation image recording and reproducing method as claimed in claims 1 or 2, in which A in the formula (I) is at least one metal oxide selected from the group consisting of Al 2 O 3 and SiO 2 .
Claim 7
Dependent Claim
31 words
The radiation image recording and reproducing method as claimed in claims 1 or 2, in which x in the formula (I) is a number satisfying the condition of 10 -5 ≦x≦0.1.
Claim 8
Dependent Claim
208 words
A radiation image storage panel comprising a support and at least one phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which at least one phosphor layer contains a divalent europium activated complex halide phosphor having the formula (I): M.sup.II FX.aM.sup.I X'.bM'.sup.II X".sub.2.cM.sup.III X"'.sub.3.xA:yEu.sup.2+ (I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M' II is at least one divalent metal selected from the group consisting of Be and Mg; M III is at least one trivalent metal selected from the group consisting of Al, Ga, In and Tl; A is at least one metal oxide; X is at least one halogen selected from the group consisting of Cl, Br and I; each of X', X" and X"' is at least one halogen selected from the group consisting of F, Cl, Br and I; a, b and c are numbers satisfying the conditions of 0≦a≦2, 0≦b≦10 -2 , 0≦c≦10 -2 , and a+b+c≧10 -6 ; and x and y are numbers satisfying the conditions of 0<x>0.5 and 0<y≦0.2, respectively.
Claim 9
Dependent Claim
208 words
A radiation image storage panel comprising a support and at least one phosphor layer provided thereon which comprises a binder and a stimulable phosphor dispersed therein, in which at least one phosphor layer contains a divalent europium activated complex halide phosphor having the formula (I): M.sup.II FX.aM.sup.I X'.bM'.sup.II X".sub.2.cM.sup.III X"'.sub.3.xA:yEu.sup.2+ (I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M' II is at least one divalent metal selected from the group consisting of Be and Mg; M III is at least one trivalent metal selected from the group consisting of Al, Ga, In and Tl; A is at least one metal oxide; X is at least one halogen selected from the group consisting of Cl, Br and I; each of X', X" and X"' is at least one halogen selected from the group consisting of F, Cl, Br and I; a, b and c are numbers satisfying the conditions of 0≦a≦2, 0≦b≦10 -2 , 0≦c≦10 -2 , and a+b+c≧10 -6 ; and x and y are numbers satisfying the conditions of 0<x>0.5 and 0<y≦0.2, respectively.
Claim 10
Dependent Claim
24 words
The radiation image storage panel as claimed in claim 7, in which each of X', X" and X"' in the formula (I) is Br.
Claim 11
Dependent Claim
22 words
The radiation image storage panel as claimed in claim 7 or 8, in which M I in the formula (I) is Na.
Claim 12
Dependent Claim
39 words
The radiation image storage panel as claimed in claim 7 or 8, in which a, b and c in the formula (I) are numbers satisfying the conditions of 10 -5 ≦a≦0.5, 0≦lb≦10 -3 , and 0≦c≦10 -3 , respectively.
Claim 13
Dependent Claim
39 words
The radiation image storage panel as claimed in claim 7 or 8, in which A in the formula (I) is at least one metal oxide selected from the group consisting of Al 2 O 3 and SiO 2 .
Claim 14
Dependent Claim
29 words
The radiation image storage panel as claimed in claim 7 or 8, in which x in the formula (I) is a number satisfying the condition of 10 -5 ≦x≦0.1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |