SCINTILLATING MATERIAL AND RELATED SPECTRAL FILTER

• US 20110180715A1
• Filed: 07/14/2009
• Published: 07/28/2011
• Est. Priority Date: 08/07/2008
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Levene, Simha, Conrads, Norbert, Schreinemacher, Herbert, Ronda, Cornelis, Zeiltier, Guenter
• Granted Patent: US 8,492,724 B2
• Time in Patent Office: Days
• US Class Current: 250/362
• CPC Class Codes: C09K 11/7771 Oxysulfides
• CPC Class Codes: G01T 1/202 the detector being a crystal
• CPC Class Codes: G21K 4/00 Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens photographic processes using X-ray intensifiers G03C5/17; discharge tubes comprising luminescent screens H01J1/62; cathode ray tubes for X-ray conversion with optical output H01J31/50

Abstract

A host lattice modified GOS scintillating material and a method for using a host lattice modified GOS scintillating material is provided. The host lattice modified GOS scintillating material has a shorter afterglow than conventional GOS scintillating material. In addition, a radiation detector and an imaging device incorporating a host lattice modified GOS scintillating material are provided.

Claims

1. A scintillating material comprising:

a modified GOS material for use with an imaging device, wherein a portion of the gadolinium (Gd) of the GOS material is replaced with at least one element selected from the group of yttrium (Y), lanthanum (La) or lutetium (Lu).

2. The scintillating material of claim 1, wherein the modified GOS material is a ceramic.

3. The scintillating material of claim 2, wherein the modified GOS material is a translucent ceramic.

4. The scintillating material of claim 1, wherein a portion of the gadolinium (Gd) is replaced with yttrium (Y).

5. The scintillating material of claim 4, wherein at least about 25% of the gadolinium (Gd) is replaced with yttrium (Y).

6. The scintillating material of claim 5, wherein at least about 50% of the gadolinium (Gd) is replaced with yttrium (Y).

7. The scintillating material of claim 6, wherein at least about 75% of the gadolinium (Gd) is replaced with yttrium (Y).

8. The scintillating material of claim 1, wherein a portion of the gadolinium (Gd) is replaced with lanthanum (La).

9. The scintillating material of claim 8, wherein at least about 25% of the gadolinium (Gd) is replaced with lanthanum (La).

10. The scintillating material of claim 9, wherein at least about 50% of the gadolinium (Gd) is replaced with lanthanum (La).

11. The scintillating material of claim 10, wherein at least about 75% of the gadolinium (Gd) is replaced with lanthanum (La).

12. The scintillating material of claim 1, wherein a portion of the gadolinium (Gd) is replaced with lutetium (Lu).

13. The scintillating material of claim 12, wherein at least about 25% of the gadolinium (Gd) is replaced with lutetium (Lu).

14. The scintillating material of claim 13, wherein at least about 50% of the gadolinium (Gd) is replaced with lutetium (Lu).

15. The scintillating material of claim 14, wherein at least about 75% of the gadolinium (Gd) is replaced with lutetium (Lu).

16. A radiation detector comprising:

a modified GOS material, wherein a portion of the gadolinium (Gd) of the GOS material is replaced with at least one element selected from the group of yttrium (Y), lanthanum (La) or lutetium (Lu); and

a photodetector optically coupled to the modified GOS material.

18. The radiation detector of claim 16, wherein the modified GOS material is a ceramic.

20. The radiation detector of claim 16, wherein a portion of the gadolinium (Gd) is replaced with yttrium (Y).

21. The radiation detector of claim 16, wherein a portion of the gadolinium (Gd) is replaced with lanthanum (La).

22. The radiation detector of claim 16, wherein a portion of the gadolinium (Gd) is replaced with lutetium (Lu).

24. The radiation detector of claim 20, further comprising a spectral filter disposed in an optical path between the modified GOS material and the photodetector and adapted to substantially block infrared light emitted from the modified GOS material.

17. (canceled)

19. (canceled)

23. (canceled)

25. A method for detecting radiation comprising the steps of:

receiving radiation with a modified GOS material, wherein a portion of the gadolinium (Gd) of the GOS material is replaced with at least one element selected from the group of yttrium (Y), lanthanum (La) or lutetium (Lu) and wherein the modified GOS material emits light in response to receiving said radiation; and

detecting the light emitted from the modified GOS material with a photodetector.

26. The method of claim 25, wherein a portion of the gadolinium (Gd) is replaced with yttrium (Y).

27. The method of claim 25, wherein a portion of the gadolinium (Gd) is replaced with lanthanum (La).

28. The method of claim 25, wherein a portion of the gadolinium (Gd) is replaced with lutetium (Lu).

29. An imaging device comprising:

at least one radiation source; and

at least one radiation detector comprising;

a modified GOS material, wherein a portion of the gadolinium (Gd) of the GOS material is replaced with at least one element selected from the group of yttrium (Y), lanthanum (La) or lutetium (Lu); and

a photodetecotor optically coupled to the modified GOS material.

30. The imaging device of claim 29, wherein the imaging device is a CT, SPECT or PET imaging device.

31. A radiation detector comprising:

a GOS material;

a photodetector optically coupled to the GOS material; and

a spectral filter disposed in an optical path between the GOS material and the photodetector and adapted to substantially block infrared light emitted from the GOS material.

32. The radiation detector of claim 31 wherein the GOS material comprises a modified GOS material, wherein a portion of the gadolinium (Gd) of the modified GOS material is replaced with at least one element selected from the group of yttrium (Y), lanthanum (La) or lutetium (Lu).

33. The radiation detector of claim 32, wherein a portion of the gadolinium (Gd) is replaced with yttrium (Y).

34. The radiation detector of claim 32, wherein a portion of the gadolinium (Gd) is replaced with lanthanum (La).

35. The radiation detector of claim 32, wherein a portion of the gadolinium (Gd) is replaced with lutetium (Lu).

36. The radiation detector of claim 31, wherein the GOS material is a ceramic.

38. The radiation detector of claim 31, wherein the spectral filter blocks light having a wavelength greater than about 900 nm.

37. (canceled)

39. (canceled)