Media for detection of X-ray exposure

• US 7,335,899 B2
• Filed: 12/03/2004
• Issued: 02/26/2008
• Est. Priority Date: 12/03/2004
• Status: Expired due to Fees

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Nair, Mridula, Bringley, Joseph F., Blanton, Thomas N.
• Primary Examiner(s): Sung; Christine
• Application Number:
  US11/003,969
• Publication Number:
  US 20060118732A1
• Time in Patent Office: 1,180 Days
• Field of Search: 250/474.1, 252/600
• US Class Current: 250/474.1
• CPC Class Codes: G01T 1/06 Glass dosimeters using colour change; including plastic dosimeters

Abstract

The invention relates to An X-ray exposure indicator device comprising a solid X-ray sensitive material that upon X-ray exposure undergoes a chromatic change, wherein the exposure indicator device does not significantly change color when subjected to UV or visible radiation.

Claims

1. An X-ray exposure indicator device comprising a solid X-ray sensitive material that upon X-ray exposure undergoes a chromatic change without additional processing of the X-ray exposure indicator device after X-ray exposure, wherein the solid X-ray sensitive material does not significantly change color when subjected to UV or visible radiation, and wherein said X-ray sensitive material comprises X-ray sensitive organic material.

2. The indicator of claim 1 wherein said solid X-ray sensitive material comprises an X-ray sensitive material dispersed in a matrix.

3. The indicator of claim 1 wherein said X-ray exposure indicator comprises an adhesive layer.

4. The indicator of claim 1 wherein said X-ray sensitive material comprises binder.

5. The indicator of claim 1 wherein said X-ray sensitive material comprises X-ray sensitive polymeric resin.

6. The indicator of claim 1 wherein said X-ray sensitive material comprises X-ray sensitive epoxy resins.

7. The indicator of claim 1 wherein said X-ray sensitive material comprises organometallic material.

8. The indicator of claim 1 wherein said X-ray sensitive material comprises metal EDTAs.

9. The indicator of claim 1 wherein said indicator comprises a substrate having attached thereto the X-ray sensitive material.

10. The indicator of claim 1 wherein said indicator comprises a substrate having attached thereto the X-ray sensitive material wherein said substrate comprises a sheet and said X-ray sensitive material comprises a continuous layer on said sheet.

11. The indicator of claim 10 wherein said indicator comprises an adhesive layer.

12. The indicator of claim 11 wherein said adhesive layer comprises Xray sensitive material.

13. The indicator of claim 1 wherein said indicator comprises a sheet comprising X-ray sensitive material in a matrix material and adhesive material in contact with said sheet.

14. The indicator of claim 1 wherein said X-ray sensitive material is in a pattern.

15. The indicator of claim 1 wherein said indicator is provided with a mask that is a barrier to X-ray exposure in a portion of said indicator.

16. The indicator of claim 1 wherein said chromatic change is a change of any combination of primary colors red, green, and blue to any combination of primary colors red, green, and blue;

any combination of primary colors red, green, and blue to any combination of secondary colors yellow, cyan, and magenta;

any combination of secondary colors yellow, cyan, and magenta to any combination of secondary colors yellow, cyan, and magenta;

or any combination of secondary colors yellow, cyan, and magenta to any combination of primary colors red, green and blue.

17. The indicator of claim 1 wherein said chromatic change is a change of shade.

18. The indicator of claim 1 wherein said chromatic change reveals a message.

19. The indicator of claim 1 wherein said indicator comprises a base sheet and said sheet is formed from at least one material selected from the group consisting of metal foils, paper, and polymer.

20. An X-ray exposure indicator device comprising a solid X-ray sensitive material that upon X-ray exposure undergoes a chromatic change without additional processing of the X-ray exposure indicator device after X-ray exposure, wherein the solid X-ray sensitive material does not significantly chanae color when subjected to UV or visible radiation, wherein said X-ray sensitive material comprises dyes, organic amines, triphenyl tetrazolium salts.

21. A method of indicating X-ray exposure comprising providing an X-ray exposure indicator comprising a solid X-ray sensitive material that upon X-ray exposure undergoes a chromatic change without additional processing of the indicator after X-ray exposure and wherein the X-ray sensitive material does not significantly change color when subjected to UV or visible radiation, affixing said X-ray exposure indicator to an article, subjecting said article and X-ray exposure indicator to X-ray exposure, and observing a chromatic change that indicates X-ray exposure, wherein said X-ray sensitive material comprises X-ray sensitive organic material.

22. The method of claim 21 wherein said article comprises luggage.

23. The method of claim 21 wherein said article comprises radiographic imaging cassette.

24. The method of claim 21 wherein said subjecting said article and X-ray exposure indicator to said exposure is carried out in a transportation site.

25. The method of claim 21 wherein said X-ray exposure indicator comprises an adhesive tape.