2.3

 

Total Number (in thousands) of Imaging Procedures in U.S. Hospitals, 1970–1990

 

47

2.4

 

Estimated Total Number of All Medical Imaging Procedures, 1970–1990

 

48

2.5

 

Typical Entrance Skin Air Kerma (ESK) per Procedure and Typical Effective Dose Equivalent (EDE) for Several Common Procedures

 

49

2.6

 

Properties of Radionuclides Used in Common Nuclear Medicine Procedures

 

54

2.7

 

Number of Nuclear Medicine Procedures (in thousands) by Examination Type

 

55

2.8

 

Dosage Levels for Several Nuclear Medicine Procedures

 

56

2.9

 

Selected Reactor-Produced Radionuclides and Their Biomedical Applications

 

58

2.10

 

Selected Accelerator-Produced Radionuclides and Their Biomedical Applications

 

60

2.11

 

Estimated Number of New Cancer Cases by Site in 1995

 

66

2.12

 

Number of Radiation Oncology Facilities, Number of Treatment Machines, and Patient Loads, 1975–1990

 

68

2.13

 

Some Properties of Radionuclides Commonly Used for Brachytherapy

 

71

2.14

 

Radionuclides Commonly Used for Therapeutic Nuclear Medicine

 

74

3.1

 

Legislative Authority for Licensing and Registration of Naturally Occurring and Accelerator-Produced Radioactive Material

 

92

3.2

 

Fee Schedule for Selected Materials License Categories for FY 1994

 

95

3.3

 

Fees Collected by the NRC in FY 1993, by Selected Materials License Category

 

97

3.4

 

Fines Collected by the NRC in FY 1993, by Selected Materials License Category

 

99

3.5

 

Savings Estimated from Projected Reduction at Four NRC Licensees

 

103

3.6

 

Federal Radiation Exposure Limits

 

106

4.1

 

Ordering of Perceived Risk for 30 Activities and Technologies

 

130

4.2

 

Summary of Perception and Acceptance of Risks from Diverse Sources of Radiation Exposure

 

132

Figures

4.1

 

Mean perceived risk and perceived benefit for medical and nonmedical sources of exposure to radiation and chemicals

 

131

4.2

 

Differential impact of trust-increasing and trust-decreasing events

 

135



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