US4236078A
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Method and apparatus for recording and reproducing a radiation image
Assignee: Fujifilm Holdings Corp
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Filing: 1979-07-12
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Granted: 1980-11-25
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Expires: 1999-07-12
Abstract
Abstract A radiation image is recorded on a stimulable phosphor, and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used at least one of the following phosphors. (a) a copper and lead activated zinc sulfide phosphor ZnS:Cu,Pb). (b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formula BaO.xAl.sub.2 O.sub.3 :Eu wherein x is a number satisfying the condition of 0.8≦x≦10. (c) a phosphor included in a group of divalent metal silicate phosphors represented by the formula M.sup.II O.ySiO.sub.2 :A wherein M II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5≦y≦2.5. (d) a phosphor included in a group of oxyhalide phosphors represented by the formula LnOX:zA' wherein Ln is at least one element selected from the group consisting of La, Y, Gd and Lu, X is Cl and/or Br, A' is Ce and/or Tb, and z is a number satisfying the condition of 0<z<0.1.
Inventors
- 👤 Noboru Kotera
- 👤 Syusaku Eguchi
- 👤 Junji Miyahara
- 👤 Seiji Matsumoto
- 👤 Hisatoyo Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:54
CPC Classifications
G; G21; G21K; G21K4/00; C; C09; C09K; C09K11/00; C09K11/08; C09K11/0838; C09K11/66; C09K11/661; C09K11/662; C09K11/77; C09K11/7728; C09K11/7734; C09K11/7766; C09K11/7767; F; F21; F21K; F21K2/00; F21K2/005; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2012; G03; G03C; G03C5/00; G03C5/16; H; H05; H05G; H05G1/00; H05G1/08; H05G1/64
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
257 words
A method for recording and reproducing a radiation image comprising the steps of (i) causing a visible ray- or infrared ray-stimulable phosphor to absorb a radiation passing through an object, (ii) stimulating said phosphor with stimulation rays selected from visible rays and infrared rays to release the energy of the radiation stored therein as fluorescent light, and (iii) detecting said fluorescent light characterized in that said phosphor is at least one phosphor selected from the group consisting of (a) a copper and lead activated zinc sulfide phosphor (ZnS:Cu,Pb), (b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formula BaO.xAl.sub.2 O.sub.3 :Eu wherein x is a number satisfying the condition of 0.8≦x≦10, (c) a phosphor included in a group of divalent metal silicate phosphors represented by the formula M.sup.II O.ySiO.sub.2 :A wherein M II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5≦y≦2.5, and (d) a phosphor included in a group of oxyhalide phosphors represented by the formula LnOX:zA' wherein Ln is at least one element selected from the group consisting of La, Y, Gd and Lu, X is Cl and/or Br, A' is Ce and/or Tb, and z is a number satisfying the condition of 0<z<0.1, and that the wavelength of said stimulation rays is not less than 500 nm.
Claim 2
Independent Claim
257 words
A method for recording and reproducing a radiation image comprising the steps of (i) causing a visible ray- or infrared ray-stimulable phosphor to absorb a radiation passing through an object, (ii) stimulating said phosphor with stimulation rays selected from visible rays and infrared rays to release the energy of the radiation stored therein as fluorescent light, and (iii) detecting said fluorescent light characterized in that said phosphor is at least one phosphor selected from the group consisting of (a) a copper and lead activated zinc sulfide phosphor (ZnS:Cu,Pb), (b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formula BaO.xAl.sub.2 O.sub.3 :Eu wherein x is a number satisfying the condition of 0.8≦x≦10, (c) a phosphor included in a group of divalent metal silicate phosphors represented by the formula M.sup.II O.ySiO.sub.2 :A wherein M II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5≦y≦2.5, and (d) a phosphor included in a group of oxyhalide phosphors represented by the formula LnOX:zA' wherein Ln is at least one element selected from the group consisting of La, Y, Gd and Lu, X is Cl and/or Br, A' is Ce and/or Tb, and z is a number satisfying the condition of 0<z<0.1, and that the wavelength of said stimulation rays is not less than 500 nm.
Claim 3
Dependent Claim
15 words
A method as defined in claim 1 wherein said stimulation rays is a laser beam.
Claim 4
Dependent Claim
16 words
A method as defined in claim 2 wherein said laser beam is a He-Ne laser beam.
Claim 5
Dependent Claim
32 words
A method as defined in claim 1 wherein said phosphor is said copper and lead activated zinc sulfide phosphor, and the wavelength of said stimulation rays is not more than 1500 nm.
Claim 6
Dependent Claim
23 words
A method as defined in claim 4 wherein the wavelength of said stimulation rays is within the range of 600 to 950 nm.
Claim 7
Dependent Claim
38 words
A method as defined in claim 1 wherein said phosphor is at least one phosphor selected from said group of europium activated barium aluminate phosphors, and the wavelength of said stimulation rays is not more than 1200 nm.
Claim 8
Dependent Claim
23 words
A method as defined in claim 6 wherein the wavelength of said stimulation rays is within the range of 650 to 1000 nm.
Claim 9
Dependent Claim
37 words
A method as defined in claim 1 wherein said phosphor is at least one phosphor selected from said group of divalent metal silicate phosphor, and the wavelength of said stimulation rays is not more than 1100 nm.
Claim 10
Dependent Claim
23 words
A method as defined in claim 8 wherein the wavelength of said stimulation rays is within the range of 500 to 700 nm.
Claim 11
Dependent Claim
35 words
A method as defined in claim 1 wherein said phosphor is at least one phosphor selected from said group of oxyhalide phosphors, and the wavelength of said stimulation rays is not more than 900 nm.
Claim 12
Dependent Claim
23 words
A method as defined in claim 10 wherein the wavelength of said stimulation rays is within the range of 500 to 700 nm.
Claim 13
Independent Claim
259 words
An apparatus for recording and reproducing a radiation image comprising (i) a radiation image storage panel comprising a visible ray- or infrared ray-stimulable phosphor which absorbs a radiation passing through an object, (ii) a light source emitting stimulation rays which stimulate said phosphor to release the energy of the radiation stored therein as fluorescent light, and (iii) a detector for detecting said fluorescent light characterized in that said phosphor is at least one phosphor selected from the group consisting of (a) a copper and lead activated zinc sulfide phosphor (ZnS:Cu,Pb), (b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formula BaO.xAl.sub.2 O.sub.3 :Eu wherein x is a number satisfying the condition of 0.8≦x≦10, (c) a phosphor included in a group of divalent metal silicate phosphors represented by the formula M.sup.II O.ySiO.sub.2 :A wherein M II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5≦y≦2.5, and (d) a phosphor included in a group of oxyhalide phosphors represented by the formula LnOX:zA' wherein Ln is at least one element selected from the group consisting of La, Y, Gd and Lu, X is Cl and/or Br, A' is Ce and/or Tb, and z is a number satisfying the condition of 0<z<0.1, and that the wavelength of said stimulation rays is not less than 500 nm.
Claim 14
Independent Claim
259 words
An apparatus for recording and reproducing a radiation image comprising (i) a radiation image storage panel comprising a visible ray- or infrared ray-stimulable phosphor which absorbs a radiation passing through an object, (ii) a light source emitting stimulation rays which stimulate said phosphor to release the energy of the radiation stored therein as fluorescent light, and (iii) a detector for detecting said fluorescent light characterized in that said phosphor is at least one phosphor selected from the group consisting of (a) a copper and lead activated zinc sulfide phosphor (ZnS:Cu,Pb), (b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formula BaO.xAl.sub.2 O.sub.3 :Eu wherein x is a number satisfying the condition of 0.8≦x≦10, (c) a phosphor included in a group of divalent metal silicate phosphors represented by the formula M.sup.II O.ySiO.sub.2 :A wherein M II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5≦y≦2.5, and (d) a phosphor included in a group of oxyhalide phosphors represented by the formula LnOX:zA' wherein Ln is at least one element selected from the group consisting of La, Y, Gd and Lu, X is Cl and/or Br, A' is Ce and/or Tb, and z is a number satisfying the condition of 0<z<0.1, and that the wavelength of said stimulation rays is not less than 500 nm.
Claim 15
Dependent Claim
15 words
An apparatus as defined in claim 12 wherein said stimulation rays is a laser beam.
Claim 16
Dependent Claim
16 words
An apparatus as defined in claim 13 wherein said laser beam is a He-Ne laser beam.
Claim 17
Dependent Claim
32 words
An apparatus as defined in claim 12 wherein said phosphor is said copper and lead activated zinc sulfide phosphor, and the wavelength of said stimulation rays is not more than 1500 nm.
Claim 18
Dependent Claim
23 words
An apparatus as defined in claim 15 wherein the wavelength of said stimulation rays is within the range of 600 to 950 nm.
Claim 19
Dependent Claim
38 words
An apparatus as defined in claim 12 wherein said phosphor is at least one phosphor selected from said group of europium activated barium aluminate phosphors, and the wavelength of said stimulation rays is not more than 1200 nm.
Claim 20
Dependent Claim
23 words
An apparatus as defined in claim 17 wherein the wavelength of said stimulation rays is within the range of 650 to 1000 nm.
Claim 21
Dependent Claim
37 words
An apparatus as defined in claim 12 wherein said phosphor is at least one phosphor selected from said group of divalent metal silicate phosphors, and the wavelength of said stimulation rays is not more than 1100 nm.
Claim 22
Dependent Claim
23 words
An apparatus as defined in claim 19 wherein the wavelength of said stimulation rays is within the range of 500 to 700 nm.
Claim 23
Dependent Claim
35 words
An apparatus as defined in claim 12 wherein said phosphor is at least one phosphor selected from said group of oxyhalide phosphors, and the wavelength of said stimulation rays is not more than 900 nm.
Claim 24
Dependent Claim
23 words
An apparatus as defined in claim 21 wherein the wavelength of said stimulation rays is within the range of 500 to 700 nm.
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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |