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US4894548A
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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: 1988-01-19
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Granted: 1990-01-16
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Expires: 2008-01-19
Abstract
Abstract A radiation image recording and reproducing method comprising steps of: (i) causing a divalent europium activated complex halide phosphor having the formula (I): M.sup.II X.sub.2 ·aM.sup.II X'.sub.2 ·bMgX".sub.2 :xEu 2+ (I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, B and x are numbers satisfying the conditions of 0.1≦a≦10.0, 2×10 -5 ≦b≦2×10 -2 and O<x≦0.2, respectively, to absorb a radiation having passed through an object or having radiated form an object; (ii) exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-1000 nm to release the radiation energy stored therein as light emission; and (iii) detecting the emitted light. A radiation image storage panel employed for said method is also disclosed. 2
Inventors
- 👤 Kenji Takahashi
- 👤 Takashi Nakamura
- 👤 Yuichi Hosoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:02
CPC Classifications
G; G21; G21K; G21K4/00; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7732; C09K11/7733
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
155 words
A radiation image recording and reproducing method comprising steps of: (i) causing a divalent europium activated complex halide phosphor having the formula (I): M.sup.II X.sub.2.aM.sup.II X'.sub.2.bMgX".sub.2 :xEu.sup.2+(I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, b and x are numbers satisfying the conditions of 0.1≦a--10.0, 2×10 -5 ≦b≦2×10 -2 and 0<x≦0.2, respectively, to absorb a radiation having passes through an object or having radiated from an object; (ii) exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-1000 nm to release the radiation energy stored therein as light emission; and (iii) detecting the emitted light.
Claim 2
Dependent Claim
155 words
A radiation image recording and reproducing method comprising steps of: (i) causing a divalent europium activated complex halide phosphor having the formula (I): M.sup.II X.sub.2.aM.sup.II X'.sub.2.bMgX".sub.2 :xEu.sup.2+(I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, b and x are numbers satisfying the conditions of 0.1≦a--10.0, 2×10 -5 ≦b≦2×10 -2 and 0<x≦0.2, respectively, to absorb a radiation having passes through an object or having radiated from an object; (ii) exposing said stimulable phosphor to an electromagnetic wave having a wavelength within the range of 450-1000 nm to release the radiation energy stored therein as light emission; and (iii) detecting the emitted light.
Claim 3
Dependent Claim
27 words
The radiation image recording and reproducing method as claimed in claim 1, in which a in the formula (I) is a number satisfying the condition of 0.3≦a≦3.3.
Claim 4
Dependent Claim
31 words
The radiation image recording and reproducing method as claimed in claim 1, in which b in the formula (I) is a number satisfying the condition of 4×10 -5 ≦b≦10 -2 .
Claim 5
Dependent Claim
22 words
The radiation image recording and reproducing method as claimed in claim 1, in which M II in the formula (I) is Ba.
Claim 6
Dependent Claim
27 words
The radiation image recording and reproducing method as claimed in claim 1, in which each of X and X' in the formula (I) is Cl or Br.
Claim 7
Dependent Claim
21 words
The radiation image recording and reproducing method as claimed in claim 1, in which X" in the formula (I) is F.
Claim 8
Dependent Claim
29 words
The radiation image recording and reproducing method as claimed in claim 1, in which x in the formula (I) is a number satisfying the condition of 10-5≦x≦10 -1 .
Claim 9
Dependent Claim
28 words
The radiation image recording and reproducing method as claimed in claim 1, in which said electromagnetic wave is one having a wavelength within the range of 500-850 nm.
Claim 10
Dependent Claim
21 words
The radiation image recording and reproducing method as claimed in claim 1, in which said electromagnetic wave is a laser beam.
Claim 11
Dependent Claim
116 words
A radiation image storage panel comprising a support and a stimulable phosphor layer provided thereon, in which said stimulable phosphor layer contains a divalent europium activated complex halide phosphor having the formula (I): M.sup.II X.sub.2.aM.sup.II X'.sub.2.bMgX".sub.2 :xEu.sup.2+(I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, b and x are numbers satisfying the conditions of 0.1≦a≦10.0, 2×10 -5 ≦b≦2×10 -2 and 0<x≦0.2, respectively.
Claim 12
Dependent Claim
116 words
A radiation image storage panel comprising a support and a stimulable phosphor layer provided thereon, in which said stimulable phosphor layer contains a divalent europium activated complex halide phosphor having the formula (I): M.sup.II X.sub.2.aM.sup.II X'.sub.2.bMgX".sub.2 :xEu.sup.2+(I) in which M II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X≠X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, b and x are numbers satisfying the conditions of 0.1≦a≦10.0, 2×10 -5 ≦b≦2×10 -2 and 0<x≦0.2, respectively.
Claim 13
Dependent Claim
25 words
The radiation image storage panel as claimed in claim 10, in which a in the formula (I) is a number satisfying the condition of 0.3≦a≦3.3.
Claim 14
Dependent Claim
29 words
The radiation image storage panel as claimed in claim 10, in which b in the formula (I) is a number satisfying the condition of 4×10 -5 ≦b≦10 -2 .
Claim 15
Dependent Claim
20 words
The radiation image storage panel as claimed in claim 10, in which M II in the formula (I) is Ba.
Claim 16
Dependent Claim
25 words
The radiation image storage panel as claimed in claim 10, in which each of X and X' in the formula (I) is Cl or Br.
Claim 17
Dependent Claim
19 words
The radiation image storage panel as claimed in claim 10, in which X" in the formula (I) is F.
Claim 18
Dependent Claim
29 words
The radiation image storage panel as claimed in claim 10, in which x in the formula (I) is a number satisfying the condition of 10 -5 ≦x≦10 -1 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |