摘要：Over the last 40 years the amount of knowledge about human radiation effects has increased dramatically. During that interval, radiation epidemiologists have documented a number of additional types of radiation-induced cancer and have established rough estimates of the magnitude of cancer risks. Nevertheless, we currently have inadequate knowledge about a number of factors that help define the magnitude of radiation risks. These include questions of estimating risk over the lifetime, shapes of dose-effect curves, magnitude of risks at low doses, potentiation between radiation and other agents, and the nature and role of host susceptibility factors. Data from various studies are used to illustrate these questions. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (658K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 153 154 155 156
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