Special issue introduction

摘要

Ionizing radiation protection regulations for humans are based onthe presumption that any amount or radiation, no matter how small, willcause cancer in a very large population. The regulations impact on theuse of ionizing radiation in routine diagnostic procedures (e.g., computedtomography), on allowable radiation levels in the environment (e.g.,residential radon levels), and on allowable radiation exposures in theworkplace (e.g., nuclear facilities).