Chapter 1

Today, radiology is considered to be a(n) _____ occupation. a. safe b. unsafe c. dangerous d. high-risk

safe

A moving object has ____ energy. a. potential b. kinetic c. nuclear d. electromagnetic

b. kinetic pg. 4: kinetic energy is the energy of motion.

Computed tomography was developed in the _____. a. 1890's b. 1920's c. 1970's d. 1990's

1970's

What does ALARA mean? a. All Level Alert Radiation Accident b. As Low As Reasonably Achievable c. Always Leave A Restricted Area d. As Low As Regulations Allow

As Low As Reasonably Achievable

The biggest source of man-made ionizing radiation exposure to the public is ______. a. atomic fallout b. diagnostic x-rays c. smoke detectors d. nuclear power plants

b. diagnostic x-rays pg. 6: diagnostic x-rays constitute the largest man-made source of ionizing radiation (3.2 mSv/yr).

What is the removal of an electron from an atom called? a. ionization b. pair production c. irradiation d. electricity

a. ionization pg. 5: ionizing radiation is any type of radiation that is capable of removing an orbital electron from the atom with which it interacts (ionization)

Matter is measured in_____ a. kilograms b. joules c. electron volts d. rems

a. kilograms pg. 3: matter is anything that occupies space and has mass. Mass is measured in kilograms.

Ice and steam are examples of two forms of ______ a. matter b. radiation c. energy d. work

a. matter pg. 4: matter can be transformed from one size, shape, and form to another.

Filtration is used to _________. a. absorb low-energy x-rays b. remove high-energy x-rays c. restrict the useful beam to the body part imaged d. fabricat gonadal shields

absorb low-energy x-rays

The basic quantities measured in mechanics are ____, ____, and _____. a. volume, length, meters b. mass, length, time c. radioactivity, dose, exposure d. meters, kilos, seconds

b. mass, length, time pg. 12: only three measurable quantities are considered basic. These base quantities are mass, length, and time, and they are the building blocks of all other quantities.

An example of a deriVed quantity in mechanical physics is a _______ a. meter b. second c. dose d. volume

b. volume pg. 12: derived quantities are derived from a combination of one or more of the three base quantities.

In the United States, we are exposed to ______ mR/year of ionizing radiation from the natural environment. a. 0-5 b. 5-20 c. 20-90 d. 100-300

c. 20-90

Ionizing radiation is capable of removing _____ from atoms as it passes through the matter. a. neutrons b. protons c. electrons d. ions

c. electrons pg. 5: ionizing radiation is any type of radiation that is capable of removing an orbital electron from the atom with which it interacts (ionization)

Atoms and molecules are the fundamental building blocks of: a. energy b. radiation c. matter d. gravity

c. matter pg. 3: the fundamental complex building blocks of matter are atoms and molecules.

The formula E=mc2 is the basis for the theory that led to the development of____ (close to m) a. x-rays b. electromagnetic radiation c. nuclear power d. cathode ray tubes

c. nuclear power pg. 5: this mass-energy equivalence serves as the basis for the atomic bomb, nuclear power plants, and certain nuclear medicine imaging modalities.

______ is a special quantity of radiologic science. a. mass b. velocity c. radioactivity d. momentum

c. radioactivity pg. 14: special quantities are designed to support measurement in specialized areas of science. In radiologic science, special quantities are those of exposure, dose, effective dose, and radioactivity.

Energy is measured in: a. Kilograms b. joules c. electron volts d. B or C

d. B or C Pg. 4: energy is measured in joules (J). In radiology the electron volt (eV) is often used.

Radio waves, light, and x-rays are all examples of _____ energy: a. nuclear b. thermal c. electrical d. electromagnetic

d. electromagnetic pg. 4: In addition to x-rays and gamma rays, electromagnetic energy includes radio waves; microwaves; and ultraviolet, infrared, and visible light.

The energy of x-rays is _______ a. thermal b. potential c. kinetic d. electromagnetic

d. electromagnetic pg. 4: In addition to x-rays and gamma rays, electromagnetic energy includes radio waves; microwaves; and ultraviolet, infrared, and visible light.

Exposure is measured in units of ______ a. becquerel b. sieverts c. meters d. grays

d. grays pg. 22: the SI unit of air Kerma (mGy) is used to express radiation exposure.