Chapter 13

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1

The actual long-term health effects of a “dirty bomb” are likely to be:

catastrophic

maximal

minimal

nonexistent

minimal

2

In ______, a neutron transforms itself into a combination of a proton and an energetic electron.

alpha decay

beta decay

gamma decay

x-ray absorption

beta

3

Each fluorine-18 nuclear transformation by positron decay yields two highly penetrating ____-keV photons.

250

472

511

777

511

4

Radioactive material that is attached to or associated with dust particles or in liquid form on various surfaces defines the term radioactive:

contamination

dispersal device

fallout

syndrome

contamination

5

If enough explosives are used to spread radioactive material over a broad area, then radioactivity is ______ higher than background levels.

extremely hazardous and may be much

moderately hazardous and may be

slightly hazardous and may be only slightly

diluted and may not be much

diluted and may not be much

6

Diagnostic techniques in nuclear medicine typically make use of ______ radioisotopes as radioactive tracers.

long-lived

short-lived

very weak

potentially lethal

short-lived

7

Strontium-89 is a pure __________ emitter.

alpha

beta

gamma

x-ray

beta

8

During a radiation emergency, the dose limit for individuals engaging in lifesaving activities is _____ mSv (_____ rem) per event.

50; 5

100; 10

250; 25

500; 50

250; 25

9

During a radiation emergency, at a dose rate of _____ Sv/hr (_____ rem/hr), emergency personnel should await specific instructions from radiation experts on how to proceed.

0.1; 10

0.5; 50

1.0; 100

5.0; 500

0.1; 10

10

While a patient receiving iodine-131 (I-131) therapy is hospitalized, a large, ____-inch-thick rolling lead shield can be positioned between the patient and any attending personnel for protection.

up to 1

2

3

6

up to 1

11

The design of a ______ imaging suite involves significant radiation safety concerns.

diagnostic x-ray

computed radiography

computed tomography

positron emission tomography/computed tomography

positron emission tomography/computed tomography

12

Iodine-125 (I-125) in the form of titanium-encapsulated cylindrical seeds has been used quite extensively within the past decade to give a tumoricidal radiation equivalent dose to:

malignant brain tumors

malignant breast tumors

malignant lung tumors

prostate cancers that are confined within the prostate gland

prostate cancers that are confined within the prostate gland

13

Strontium is a member of the same family of elements in the periodic table as is:

calcium

carbon

sodium

potassium

calcium

14

Therapeutic radioisotopes are characterized by:

very short half-lives

half-lives that are exactly the same

relatively long half-lives

half-lives that remain constant for all eternity

relatively long half-lives

15

Tellurium-125 (Te-125) has _____ protons and _____ neutrons.

125; 125

75; 63

52; 73

45; 58

52; 73