Binderless storage phosphor screen comprising a support including an amorphous (a-C) carbon layer

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Quick Facts

Patent No.: US 7,196,341
App. No.: 11/400,395
Granted: Mar 27, 2007
Kind: B2

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Abstract

A binderless storage phosphor screen comprises a vacuum deposited CsBr:Eu phosphor layer on a support, wherein the support includes a layer of amorphous carbon and optionally one or more auxilliary layers.

Claims (77)

1. A method for exposing an object to X-rays comprising the steps of:

providing an X-ray machine including an X-ray tube equipped for emitting X-rays with an energy lower than or equal to 70 keV and a phototimer coupled to said X-ray tube for switching said tube on and off in accordance with an X-ray dose in the range from 0.75 up to 0.85 mR reaching said phototimer,

placing an object between said X-ray tube and said phototimer,

placing a cassette with a binderless storage phosphor panel or screen between said object and said phototimer and

activating said X-ray tube for exposing said object, said cassette and said phototimer until said phototimer switches said X-ray tube off, wherein said binderless storage phosphor panel comprises on a support ( 2 ) having a layer of amorphous carbon ( 23 ) with a thickness between 500 μm and 2000 μm, and a vacuum deposited phosphor layer ( 1 ) having a needle shaped CsBr:Eu phosphor, wherein amounts of Eu are in the range of from 100 up to 400 p.p.m. versus CsBr.

2. Method according to claim 1 ,

wherein amounts of Eu are in the range of from 100 up to 200 p.p.m. versus CsBr.

3. Method according to claim 1 ,

wherein amounts of Eu are in the range from 150 to 130 p.p.m. versus CsBr.

4. Method according to claim 1 ,

wherein said support further includes a reflective auxiliary aluminum layer ( 22 ) with a thickness between 0.2 μm and 200 μm.

5. Method according to claim 2 ,

wherein said support further includes a reflective auxiliary aluminum layer ( 22 ) with a thickness between 0.2 μm and 200 μm.

6. Method according to claim 3 ,

wherein said support further includes a reflective auxiliary aluminum layer ( 22 ) with a thickness between 0.2 μm and 200 μm.

7. Method according to claim 1 ,

wherein said support further includes a protective auxiliary layer ( 21 ) between said reflective auxiliary layer and said phosphor layer.

8. Method according to claim 2 ,

wherein said support further includes a protective auxiliary layer ( 21 ) between said reflective auxiliary layer and said phosphor layer.

9. Method according to claim 3 ,

wherein said support further includes a protective auxiliary layer ( 21 ) between said reflective auxiliary layer and said phosphor layer.

10. Method according to claim 4 ,

wherein said support further includes a protective auxiliary layer ( 21 ) between said reflective auxiliary layer and said phosphor layer.

11. Method according to claim 5 ,

wherein said support further includes a protective auxiliary layer ( 21 ) between said reflective auxiliary layer and said phosphor layer.

12. Method according to claim 6 ,

wherein said support further includes a protective auxiliary layer ( 21 ) between said reflective auxiliary layer and said phosphor layer.

13. Method according to claim 7 ,

wherein said protective auxiliary layer ( 21 ) is a layer of parylene wherein said parylene is selected from the group consisting of parylene C, parylene D and parylene HT.

14. Method according to claim 8 ,

wherein said protective auxiliary layer ( 21 ) is a layer of parylene wherein said parylene is selected from the group consisting of parylene C, parylene D and parylene HT.

15. Method according to claim 9 ,

wherein said protective auxiliary layer ( 21 ) is a layer of parylene wherein said parylene is selected from the group consisting of parylene C, parylene D and parylene HT.

16. Method according to claim 10 ,

wherein said protective auxiliary layer ( 21 ) is a layer of parylene wherein said parylene is selected from the group consisting of parylene C, parylene D and parylene HT.

17. Method according to claim 11 ,

wherein said protective auxiliary layer ( 21 ) is a layer of parylene wherein said parylene is selected from the group consisting of parylene C, parylene D and parylene HT.

18. Method according to claim 12 ,

wherein said protective auxiliary layer ( 21 ) is a layer of parylene wherein said parylene is selected from the group consisting of parylene C, parylene C and parylene HT.

19. Method according to claim 1 ,