Chapter 38

Question 1

ALARA Concept

Answer 1

Concept of radiation protection that states that all exposures should be kept “as low as reasonably achievable.”

Question 2

Anode

Answer 2

The positive electrode in an X-ray tube.

Question 3

Atom

Answer 3

The basic unit of matter

Question 4

exposure button

Answer 4

When the exposure button is pressed, a dental X-ray machine emits X-rays that pass through the patient’s body to create an image on a special plate.

Question 5

Bremsstrahlung radiation

Answer 5

“Braking radiation”. The sudden deceleration of elections as they interact interact with highly positive charged nuclei.

Question 6

Cathode

Answer 6

The negative electrode in the x-ray tube.

Question 7

cathode

Answer 7

the negatively charged electrode by which electrons enter an electrical device

Question 8

Central ray

Answer 8

X-rays at the center of the beam.

Question 9

Control Panel

Answer 9

The portion of the x-ray unit that contains the master switch, the indicator light, selector buttons and exposure button.

Question 10

Dental radiography

Answer 10

The process of recording images of the teeth & adjacent structures by exposure of x-radiation.

Question 11

density

Answer 11

the degree of compactness of a substance.

Question 12

Digital imaging

Answer 12

The fullness method of capturing an image and displaying it by using an image receptor, an electronic signal, & a computer to process and store the image.

Question 13

Distortion

Answer 13

Change in the size of an image caused by incorrect vertical angulation.

Question 14

Dose

Answer 14

The amount of energy absorbed by tissues.

Question 15

Dosimeter

Answer 15

A device used to detect & measure and accumulated dosage of radiation.

Question 16

Electron

Answer 16

A negatively charged particle in an atom.

Question 17

Energy

Answer 17

The ability to do work.

Question 18

Extension arm

Answer 18

Flexible arm that is attached to the x-ray tube head

Question 19

Genetic effects

Answer 19

Effects of radiation that are passed on to future generations through genetic cells.

Question 20

Image

Answer 20

Film-based or digitally produced recordings of anatomical structures.

Question 21

Image receptor

Answer 21

A recording medium for an image, normally film. (PSP) phosphor storage plate -or a digital sensor.

Question 22

Ion

Answer 22

An electrically charged particle.

Question 23

Ionization

Answer 23

Radiation that produces ionization, resulting in harmful affects.

Question 24

ionizing

Answer 24

radiation that has enough energy to break an electron away from an atom

Question 25

Kilovoltage

Answer 25

Highest voltage if X-ray tube used during an exposure.

Question 26

Latent

Answer 26

Time between exposure to ionizing radiation and appearance of symptoms.

Question 27

Lead apron

Answer 27

Device used to protect the reproductive and blood-forming tissues from scatter radiation.

Question 28

Magnification

Answer 28

The proportional enlargement of an image.

Question 29

Matter

Answer 29

Anything that occupies space and has form or shape.

Question 30

Milliampere

Answer 30

One one-thousandth of an ampere; a unit of measurement used to describe the intensity of an electrical current.

Question 31

Penumbra

Answer 31

The blurred or indiativnt area that surrounds an image

Question 32

Photon

Answer 32

An minute (tiny) bundle of pure energy that has no weight or mass.

Question 33

Primary beam

Answer 33

The most penetrating beam produced at the target of the anode.

Question 34

Primary radiation

Answer 34

Same as primary beam

Question 35

Radiation

Answer 35

Forms of waves of energy emission through space or material.

Question 36

Radiation monitoring badge

Answer 36

A device that contains a film packet used to detect and measure radiation exposure of personnel.

Question 37

Radiograph

Answer 37

Image produced on photosensitive film my exposing the film radiation and then processing it.

Question 38

Radiology

Answer 38

The science or study of radiation as used in medicine

Question 39

Scatter radiation

Answer 39

A form of secondary radiation that occurs when an x-ray beam has been deflected from it's path by interaction with matter

Question 40

Secondary radiation

Answer 40

X-radiation that is created when the primary beam interacts with matter.

Question 41

Sensor

Answer 41

A solid-state image receptor that contains a silicon chip with an electric circuit

Question 42

Sharpness

Answer 42

A measure of how well an image reproduces the fine details or outline of an object

Question 43

Thyroid collar

Answer 43

A flexible lead shield that's placed securely around the neck

Question 44

Tube head

Answer 44

The part of the x-ray unit that contains the X-ray tube, the high-voltage and low-voltage transformers, and insulating oil.

Question 45

Tungsten target

Answer 45

A focal spot in the anode

Question 46

X-radiation

Answer 46

High energy ionizing electromagnetic radiation

Question 47

ampere

Answer 47

the SI base unit of electrical current

Question 48

contrast

Answer 48

the state of being strikingly different from something else in juxtaposition or close association

Question 49

quality (of x-ray beam)

Answer 49

refers to the overall energy or wavelength of the beam and its penetrating power.

Question 50

quantity (of x-ray beam)

Answer 50

Current determines the number of photons the X-ray tube produces, also known as X-ray quantity

Question 51

master switch, indicator light, selector buttons

Answer 51

Controls for the x ray