Radioactivity is a part of our earth - it has existed all along. Naturally occurring radioactive materials are present in its crust, the floors and walls of our homes, schools, or offices and in the ...

Brachytherapy allows a high radiation dose to be delivered locally to a tumour with a sharp dose fall-off outside the tumour. Use of this treatment modality is generally limited to small, ...

Variation in the amounts of radioactivity that is associated with dose calibration and administration of gamma-emitting radioactive drugs was studied. Health systems use radionuclide dose ...