Abstract
Nuclear medicine offers many diagnostic possibilities for which there are no adequate alternatives. The growing contribution of nuclear procedures to diagnostic medicine, however, has an additional effect: the radiation on normal tissues. Accurate estimations of the radiation dose and the related risks is required to weigh the advantages against the disadvantages due to a certain nuclear procedure in a specific situation. In this review the aspects of dose calculation (dosimetry) and dose-effect relation are discussed. Also the current opinion about dose limits will be dealt with. Particularly specialists for internal diseases should be aware of these considerations.
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