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Health Risks of Ionizing Radiation: - Clark University

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Contents<br />

List <strong>of</strong> Tables ............................................................................................................................... vi<br />

List <strong>of</strong> Figures ............................................................................................................................. vii<br />

Acknowledgments ........................................................................................................................ x<br />

1. INTRODUCTION ................................................................................................................ 1<br />

1.1 Goals ............................................................................................................................. 1<br />

<strong>Ionizing</strong> radiation ................................................................................................... 1<br />

Low dose ................................................................................................................ 1<br />

1.2 A brief history <strong>of</strong> radiation ........................................................................................... 1<br />

1.3 Exposure ....................................................................................................................... 2<br />

1.4 Standards ...................................................................................................................... 3<br />

1.5 <strong>Radiation</strong> basics ............................................................................................................ 3<br />

1.6 Epidemiological methods ............................................................................................. 7<br />

Statistical significance ............................................................................................ 7<br />

Study design ........................................................................................................... 8<br />

1.7 Risk terminology .......................................................................................................... 9<br />

Relative risk ........................................................................................................... 9<br />

Excess relative risk (ERR) ..................................................................................... 9<br />

Odds ratio (OR) ...................................................................................................... 9<br />

Excessive absolute risk (EAR) ............................................................................... 9<br />

Standardized incidence ratio (SIR) ........................................................................ 9<br />

Standardized mortality ratio (SMR) ....................................................................... 9<br />

P value .................................................................................................................. 10<br />

Confidence interval .............................................................................................. 10<br />

1.8 Dose-response curves ................................................................................................. 10<br />

1.9 Overview structure ..................................................................................................... 11<br />

2. BACKGROUND RADIATION ......................................................................................... 13<br />

2.1 Introduction ................................................................................................................ 13<br />

2.2 Summary <strong>of</strong> studies .................................................................................................... 13<br />

External exposure ................................................................................................. 14<br />

High exposure areas ............................................................................................. 14<br />

Radon ................................................................................................................... 15<br />

2.3 Discussion ................................................................................................................... 17<br />

3. MEDICAL EXPOSURES .................................................................................................. 19<br />

3.1 Introduction ................................................................................................................ 19<br />

3.2 Diagnostic exposures .................................................................................................. 21<br />

Diagnostic x-rays ................................................................................................. 21<br />

Diagnostic iodine-131 .......................................................................................... 23<br />

i

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