Patent Number: 051480409
Section: claims

1. A shield for use with a radiation detecting probe to effect the detection, localization, imaging or mapping of radiation in a first, internal portion of the body of a living being by use of a radiation detecting probe, said probe having a field of view, said shield comprising a sheet formed of a radiation blocking material and sized to be readily located within a space in the body of the being so that said first, internal portion is interposed between remainder said shield and said probe, with said shield filling up a substantial portion of the field of view, thereby blocking radiation from sources behind said shield. 2. The shield of claim 1 wherein the surface of said shield which comes into contact with any portion of the body of said being is non-toxic. 3. The shield of claim 2 wherein said shield is formed of a material in the group comprising pure tungsten, tungsten alloys, tungsten powder suspended in gold, pure gold, gold alloys, pure platinum, and platinum-iridium alloys. 4. The shield of claim 3 wherein said tungsten, tungsten alloys, and tungsten powder suspended in gold, when used to form said shield are chrome plated. 5. The shield of claim 1 wherein said sheet is approximately 3 inches (7.62 cm) wide by 3.5 inches (8.89 cm) high. 6. The shield of claim 5 wherein said material is tungsten and said sheet is approximately 1/8 inch (0.32 cm) thick. 7. The shield of claim 1 additionally comprising means to mount said shield on said probe. 8. The shield of claim 7 wherein said last mentioned means is adjustable to vary the spacing of said shield from said probe. 9. The shield of claim 8 wherein said sheet is approximately 3 inches (7.62 cm) wide by 3.5 inches (8.89 cm) high. 10. The shield of claim 9 wherein said material is tungsten and said sheet is approximately 1/8 inch (0.32 cm) thick. 11. The shield of claim 7 wherein said sheet is approximately 3 inches (7.62 cm) wide by 3.5 inches (8.89 cm) high. 12. The shield of claim 11 wherein said material is tungsten and said sheet is approximately 1/8 inch (0.32 cm) thick. 13. The shield of claim 7 wherein the surface of said shield which comes into contact with any portion of the body of said being is non-toxic. 14. The shield of claim 13 wherein said shield is formed of a material in the group comprising pure tungsten, tungsten alloys, tungsten powder suspended in gold, pure gold, gold alloys, pure platinum, and platinum-iridium alloys. 15. The shield of claim 14 wherein said tungsten, tungsten alloys, and tungsten powder suspended in gold, when used to form said shield are chrome plated. 16. The shield of claim 8 wherein the surface of said shield which comes into contact with any portion of the body of said being is non-toxic. 17. The shield of claim 16 wherein said shield is formed of a material in the group comprising pure tungsten, tungsten alloys, tungsten powder suspended in gold, pure gold, gold alloys, pure platinum, and platinum-iridium alloys. 18. The shield of claim 17 wherein said tungsten, tungsten alloys, and tungsten powder suspended in gold, when used to form said shield are chrome plated. 19. A method of effecting the detection, localization, imaging or mapping of radiation in a first, internal portion of the body of a living being by use of a radiation detecting probe, said probe having a field of view, said method comprising introducing a shield into the body of said being, said shield comprising a sheet formed of a radiation blocking material and sized to be readily located within a space in the body of the being so that said first, internal portion is interposed between said shield and said probe, with said shield filling up a substantial portion of the field of view, whereupon said shield blocks radiation from sources behind said shield. 20. The method of claim 19 wherein said shield is mounted on said probe. 21. The method of claim 20 wherein the position of said shield with respect to said probe is adjustable via means mounting the shield on the probe.