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Medicine imaging and tumor treatments

Uses of Nuclear Radiation. Medicine imaging and tumor treatments. Thyroid imaging using Tc-99. Food Irradiation. Food can be irradiated with gamma rays from 60 Co or 137 Cs. Irradiated milk has a shelf life of 3 months without refrigeration.

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Medicine imaging and tumor treatments

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  1. Uses of Nuclear Radiation • Medicine imaging and tumor treatments Thyroid imaging using Tc-99

  2. Food Irradiation • Food can be irradiated with gamma rays from 60Co or 137Cs. • Irradiated milk has a shelf life of 3 months without refrigeration. • USDA has approved irradiation of meats and eggs.

  3. 1000-10,000 kilorads

  4. Radiocarbon Dating--The radioactivity of a sample can be used to determine how old it is. • Half-life: The time for half of the nuclei to decay. Isotope Half-Life Radiation Emitted Carbon-14 5,730 years b, g Radon-222 3.8 days a Uranium-235 7.0 x 108 years a, g Uranium-238 4.46 x 109 years a

  5. Half-Life Graph

  6. The times given in this table are the “half-life” values for the decay of U-238 into Pb-206.

  7. Transuranium Elements: Beyond #92

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