Patent ID: 7706506
Filing Date: 2010-04-27
Classification: G21K,H01J

Abstract:
1. A system for irradiating material used in transfusions, the material can be pre-transfused blood, blood components and marrow, the system comprising: a vacuum chamber; a cathode disposed inside the vacuum chamber, the cathode having a large beam electrode emissive surface, the emission surface having a selected cross-sectional shaped area; a power supply connected to the cathode for generating negative high-voltage pulses thereto, whereby the negative high-voltage pulses causing a selected cross-sectional shaped beam of electrons to be emitted from the selected cross-sectional shaped area of the emissive surface of the cathode; an electron window disposed inside the vacuum chamber, the electron window made of thin metal foil, the thin metal foil having a low atomic number, the electron window for receiving the selected cross-sectional shaped beam of electrons therethrough; an electron target disposed outside the vacuum chamber, the electron target positioned substantially parallel to the electron window and in a spaced relationship thereto, the electron target receiving the selected cross-sectional shaped beam of electrons thereon and generating a selected cross-sectional shaped X-ray beam; and an X-ray beam filter in contact with and disposed next to the electron target and parallel thereto, the filter spaced apart from the material to be irradiated by the X-ray beam, the filter eliminating low energy beams from the spectrum of the X-ray beam when the X-ray beam is received therethrough, the filtered X-ray beam exposing the material to high energy beams from the spectrum of the X-ray beam.