Vett 116 Diagnostic Imaging 1 Test 1

Front 1

Why is radiation harmful?

Back 1

It is ordorless, colorless, tasteless and it’s effects are cumulative.

Front 2

What specific precautions should be taken when working around ionizing radiation?

Back 2

A dosimetry badge should be worn as well as a lead apron and gloves. Tyroid collar, leaded glasses are also suggested. Never place any body part, including gloved hand in the primary beam.

Front 3

What personnel should not assist with radiographic procedures?

Back 3

Pregnant women or those under 18 years of age.

Front 4

Define: Electromagnetic radiation

Back 4

A method of transporting energy through space, distinguished by wavelength, frequency and energy.

Front 5

Define: Atom

Back 5

A basic part of matter that consists of a nucleus and a surrounding cloud of electrons.

Front 6

Define: Proton

Back 6

A positively charged particle located in the nucleus of an atom.

Front 7

Define: Neutron

Back 7

A neutral particle located in the nucleus of an atom.

Front 8

Define: Electron

Back 8

A negatively charged particle that travels around the nucleus.

Front 9

Define: Shell

Back 9

An electron’s orbital path and energy level.

Front 10

Define X-rays

Back 10

A form of electromagnetic radiation similar to visible light, but of a shorter wavelength.

Front 11

Define X-ray beam

Back 11

A number of x-rays traveling together through space at a rapid speed.

Front 12

Define Photons/Quanta

Back 12

A bundle of radiant energy (synonymous with photons)

Front 13

Define Radiograph

Back 13

A visible photographic record on film produced by x-rays passing through an object.

Front 14

Define Wavelength

Back 14

The distance between two consecutive corresponding points on a wave.

Front 15

The negatively charged particle of an atom is the:

Back 15

Electron

Front 16

As x-rays pass through materials, they have the ability to:

Back 16

a. Cause some substances to fluoresce (emit visible light)
b. Completely remove an electron from an atom, leaving the atom positively charged.
c. Cause chemical changes that can kill cells.

Front 17

True or Flase: X-rays with shorter wavelengths penetrate farther than rays with longer wavelengths.

Back 17

True.

Front 18

Electrons travel:

Back 18

Around the nucleus in a specific orbit called a shell

Front 19

Bundles of energy that travel in a wave are called:

Back 19

Photons, Quanta

Front 20

True or false: A radiograph and an x-ray are terms that can be used interchangeably.

Back 20

False.

Front 21

True or false: A radiograph and an x-ray are terms that can be used interchangeably.

Back 21

False.

Front 22

True or False: Electromagnetic radiation travels in a straight line and may be
redirected by various objects but will always travel in a straight line.

Back 22

True.

Front 23

Atoms consist of what 3 particles?

Back 23

Neutrons, protons, and electrons.

Front 24

Which of these 3 particles is located in the nucleus?

Back 24

Neutrons and photons.

Front 25

Sometimes we hear the term x-ray and radiograph used to mean the same thing. How
are they different?

Back 25

An x-ray is a form of electromagnetic radiation while a radiograph is the visible photographic record.

Front 26

Anode

Back 26

A positively charged electrode that acts as a target for the electrons from the cathode. Electrons interacting with the anode produce heat and x-rays.

Front 27

Cathode

Back 27

A negatively charged electrode that provides a source of electrons.

Front 28

Collimator

Back 28

A restricting device used to control the size of the primary x-ray beam.

Front 29

Console

Back 29

The control panel of the x-ray machine.

Front 30

Effective focal spot

Back 30

The area of the focal spot that is visible through the x-ray tube window and is directed toward the x-ray film.

Front 31

Filament

Back 31

Part of a low-energy circuit in the cathode that, when heated, releases electrons from their orbits.

Front 32

Focal spot

Back 32

The small area of the target with which electrons collide on the anode.

Front 33

Focusing cup

Back 33

A recessed area where the filament lies, directing the electrons towards the anode.

Front 34

Glass envelope

Back 34

A glass vacuum tube that contains the anode and cathode of the x-ray tube.

Front 35

Rotating anode

Back 35

An anode that turns on its axis to increase x-ray production while dissipating heat.

Front 36

Stationary anode

Back 36

A nonmoving anode, usually found in dental and small portable radiography units.

Front 37

Target

Back 37

Anode

Front 38

Tungsten

Back 38

A common metal used in the filament of the cathode.

Front 39

X-ray tubes

Back 39

A mechanism consisting of an anode and a cathode in a vacuum that produces a controlled x-ray beam.

Front 40

What is the primary purpose of the x-ray tube?

Back 40

To produce a controlled x-ray beam.

Front 41

What is the purpose of the cathode of an x-ray machine?

Back 41

To provide a source of electrons and direct these electrons toward the anode.

Front 42

What structures are found in the cathode?

Back 42

Coiled wire filament constructed of tungsten mounted on rigid wires, focusing cup made of molybdenum.

Front 43

The filament is constructed of what material?

Back 43

Tungsten

Front 44

Why do you think tungsten is used?

Back 44

Because of its high melting point and high atomic number.

Front 45

What is the function of the focusing cup?

Back 45

Directs the electrons towards the anode.

Front 46

What is the purpose of the anode of an x-ray machine?

Back 46

It’s a target for the electrons from the cathode.

Front 47

What structures are located in the anode?

Back 47

A beveled target of tungsten on a circular base of copper

Front 48

The target is composed of what type of material?

Back 48

Tungsten

Front 49

What is the purpose of a collimator on the x-ray machine?

Back 49

It’s used to control the size of the primary x-ray beam.

Front 50

kvp

Back 50

Energy of the xray that determines the penetrating power of the x-ray beam

Front 51

mA

Back 51

Number of x-rays produced during the exposure.

Front 52

The legal requirement for keeping radiographs is how many years?

Back 52

7 years.

Front 53

True or false. A small amount of air within the glass envelope is beneficial as it aids with heat dissipation

Back 53

True.

Front 54

True or false. X-rays with longer wavelengths have higher frequency and penetrate farther than shorter wavelengths.

Back 54

False.

Front 55

Electrons travel

Back 55

toward the anode.

Front 56

True or false. Ionization requires more energy than excitation

Back 56

True.

Front 57

Dosimeters, or radiation badges, are used to:

Back 57

monitor x-ray exposure.

Front 58

True or false. A Veterinary Technician may also be responsible for maintaining the development and fixative solutions in the film processors (automatic or manual).

Back 58

True.

Front 59

True or False. A Veterinary Technician may also be responsible and trained to complete other imaging techniques, such as Ultrasounds or Endoscopic procedures, to gather information to be interpreted by the radiologist.

Back 59

True.

Front 60

True or false. X-ray electromagnetic radiation travels in a straight line, however, the direction can be altered.

Back 60

True.

Front 61

True or false. Another appropriate name for a radiograph is an x-ray

Back 61

False.

Front 62

True or false. Veterinary Technicians are able to legally interpret patient radiographs as part of the diagnostic process.

Back 62

False.

Front 63

Wilhelm Conrad Roentgen discovered:

Back 63

x-rays.

Front 64

The number of cycles of the wave that pass a stationary point in a second defines:

Back 64

frequency.

Front 65

True or false. The radiograph is an important diagnostic tool

Back 65

True.

Front 66

Bundles of energy that travel in a wave are called:

Back 66

photons.