Patent Number: 
Section: claims

1. Image storage screen or panel comprising a binderless needle-shaped stimulable phosphor of CsBr:Eu, wherein amounts of Eu-dopant are in the range of from 100 up to 400 p.p.m. versus CsBr, and a substrate, and wherein said substrate has a surface roughness of less than 2 μm and a reflectivity of more than 80%. 2. Image storage screen or panel according to claim 1, wherein said binderless needle-shaped stimulable phosphor has from 100 up to 200 p.p.m. of Eu-dopant versus CsBr. 3. Screen or panel according to claim 1, wherein said reflectivity is at least 90%. 4. Screen or panel according to claim 2, wherein said reflectivity is at least 90%. 5. Screen or panel according to claim 1, wherein said reflectivity is at least 95%. 6. Screen or panel according to claim 2, wherein said reflectivity is at least 95%. 7. Screen or panel according to claim 1, wherein said substrate has a surface roughness of less than 1 μm. 8. Screen or panel according to claim 2, wherein said substrate has a surface roughness of less than 1 μm. 9. Screen or panel according to claim 3, wherein said substrate has a surface roughness of less than 1 μm. 10. Screen or panel according to claim 4, wherein said substrate has a surface roughness of less than 1 μm. 11. Screen or panel according to claim 5, wherein said substrate has a surface roughness of less than 1 μm. 12. Screen or panel according to claim 6, wherein said substrate has a surface roughness of less than 1 μm. 13. Screen or panel according to claim 1, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 14. Screen or panel according to claim 2, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 15. Screen or panel according to claim 3, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 16. Screen or panel according to claim 4, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 17. Screen or panel according to claim 5, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 18. Screen or panel according to claim 6, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 19. Screen or panel according to claim 7, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 20. Screen or panel according to claim 8, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 21. Screen or panel according to claim 9, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 22. Screen or panel according to claim 10, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 23. Screen or panel according to claim 11, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 24. Screen or panel according to claim 12, wherein said substrate is an amorphous carbon layer, overcoated with a reflecting layer. 25. Screen or panel according to claim 13, wherein said reflecting layer is a metal layer. 26. Screen or panel according to claim 14, wherein said reflecting layer is a metal layer. 27. Screen or panel according to claim 13, wherein said reflecting layer is an aluminum layer. 28. Screen or panel according to claim 14, wherein said reflecting layer is an aluminum layer. 29. A system for computed radiography comprising an image screen or panel of claim 1. 30. A system for computed radiography comprising an image screen or panel of claim 2. 31. A system for computed radiography comprising an image screen or panel of claim 3. 32. A system for computed radiography comprising an image screen or panel of claim 4. 33. A system for computed radiography comprising an image screen or panel of claim 5. 34. A system for computed radiography comprising an image screen or panel of claim 6. 35. A system for computed radiography comprising an image screen or panel of claim 7. 36. A system for computed radiography comprising an image screen or panel of claim 8. 37. A system for computed radiography comprising an image screen or panel of claim 9. 38. A system for computed radiography comprising an image screen or panel of claim 10. 39. A system for computed radiography comprising an image screen or panel of claim 11. 40. A system for computed radiography comprising an image screen or panel of claim 12. 41. A system for computed radiography comprising an image screen or panel of claim 13. 42. A system for computed radiography comprising an image screen or panel of claim 14. 43. A system for computed radiography comprising an image screen or panel of claim 15. 44. A system for computed radiography comprising an image screen or panel of claim 16. 45. A system for computed radiography comprising an image screen or panel of claim 17. 46. A system for computed radiography comprising an image screen or panel of claim 18. 47. A system for computed radiography comprising an image screen or panel of claim 19. 48. A system for computed radiography comprising an image screen or panel of claim 20. 49. A system for computed radiography comprising an image screen or panel of claim 21. 50. A system for computed radiography comprising an image screen or panel of claim 22. 51. A system, for computed radiography comprising an image screen or panel of claim 23. 52. A system for computed radiography comprising an image screen or panel of claim 24. 53. A mammographic system comprising the system for computed radiography of claim 29. 54. A mammographic system comprising the system for computed radiography of claim 30. 55. A mammographic system comprising the system for computed radiography of claim 31. 56. A mammographic system comprising the system for computed radiography of claim 32. 57. A process for obtaining an image comprising:exposing said image screen or panel of claim 1 with image radiation attenuated by an object or emitted by an object;storing said image radiation as stored radiation on said image screen or panel;exposing said image screen or panel to stimulating rays to release said stored radiation as light;collecting said light;converting said light into electrical signals; andproducing an image from said electrical signals wherein said image corresponds to said image radiation.