Patent Number: 
Section: claims

1. An X-ray irradiator for providing a uniform dose of X-ray beam irradiation, said irradiator comprising in combination; a) a chamber for mounting items to be irradiated;  b) an X-ray tube mounted to irradiate said items; and  c) a collar of a low Z high density material mounted adjacent said chamber so as to reflect X-rays from said tube onto said items. 2. An X-ray irradiator for providing X-ray beams to irradiate items, said irradiator comprising in combination, a) a chamber for containing said items;  b) first and second X-ray tubes mounted to provide irradiation to opposite surfaces of said items; and  c) a collar of low Z high density material mounted around a cannister to reflect X-rays from said tubes to said items;  d) the irradiation of said tubes, and the reflected irradiation from said collar effectively combining to provide total uniform irradiation to said items. 3. An X-ray irradiator as in  claim 2  wherein said X-ray tubes each provide a beam of radiation to fully cover the area of said chamber. claim 2 4. An X-ray irradiator for providing a uniform dose of X-ray beam irradiation to blood product transfusion bags, said irradiator comprising in combination, a) a chamber for mounting said transfusion bags;  b) X-ray tubes mounted on opposed sides of said chamber; said tubes providing X-ray beams of radiation to said bags from opposite sides of said bags;  c) said tubes each providing radiation at a same selected energy level to said bags to thereby provide a total radiation energy to said bags which is substantially uniform throughout each of said bags; and  d) a collar of a low Z high density material mounted around a cannister to further reflect X-rays onto said bags. 5. An X-ray irradiator as in  claim 4  wherein a cannister is mounted in said chamber, said cannister being dimensioned to contain said bags, and said cannister being of a plastic material which absorbs minimal X-ray energy. claim 4 6. A system as in  claim 4  wherein said X-ray tubes are each mounted on opposite sides of said chamber and the same distance from the respective facing surface of said chamber. claim 4 7. A system as in  claim 5  wherein up to three bags can be mounted in said cannister providing a large increase in the efficiency of said system. claim 5 8. A system as in  claim 5  wherein said chamber and said cannister are both circular and said cannister is mounted within said chamber to have its exterior circular surface in abutting relation within the inner circular surface of said chamber. claim 5 9. A method for providing a uniform dose of X-ray beam irradiation to blood products transfusion bags, said method comprising in combination, a) mounting said bags in an irradiation chamber;  b) irradiating said bags from opposite sides of said bags at a same selected energy level to said bags to thereby provide a radiation energy to said bags which is substantially uniform throughout said bags; and  d) reflecting said X-rays from a low Z high density material mounted around a cannister and directing said X-rays onto said bags,  thereby operatively combining the X-ray energies from said opposite sides and the reflected X-ray energy into a total effective irradiation for said bags.