Deck 9: Radiology

Question 1

Repeated exposure to radiation results in buildup called the latent period.

Answer 1

False

Question 2

The purpose of a dosimeter is to

A) block radiation from genetic cells
B) beep when exposed to excess radiation
C) measure accumulated doses of radiation
D) practice radiographic technique

Answer 2

measure accumulated doses of radiation

Question 3

The part of the vacuum tube that generates the electrons is the

A) cathode
B) filament
C) anode
D) all of the above

Answer 3

filament

Question 4

Using good radiographic technique and proper control settings will result in radiation exposure that is

A) ALARA
B) MPD
C) rad
D) rem

Question 5

Faster-speed film requires less exposure time for the patient.

Question 6

A film speed of A is faster than a film speed of F.

Question 7

Primary radiation is the desired radiation and is used to expose the radiographic film.

Question 8

Underdeveloped films are dark and hard to view.

Question 9

Increasing the mA will cause a darker radiograph.

Question 10

The kVp helps to determine the penetrating power of the radiation.

Question 11

A periapical film size for a child is size

A) 1
B) 2
C) 3
D) none of the above

Question 12

Which of the following cells are most radiosensitive?

A) old skin cells
B) old reproductive cells
C) young skin cells
D) young reproductive cells

Question 13

To increase the density of the film, increase the mA.

Question 14

The operator typically wears a lead shield/apron to reduce exposure to radiation.

Question 15

To increase the density of the film, increase the exposure time.

Question 16

The part of the vacuum tube that serves as the electron source is the

A) cathode
B) filament
C) anode
D) all of the above

Question 17

The part of the vacuum tube that converts electron force into photons is the

A) cathode
B) anode
C) focal spot
D) collimator

Question 18

A periapical film size for an adult posterior film is size

A) 1
B) 2
C) 3
D) 4

Question 19

Cephalometric radiographs are used in orthodontic offices.

Question 20

Overdeveloped films result when films are allowed to "fix" too long.

Question 21

A radiolucent area on a film is

A) dark
B) light
C) sharp
D) fuzzy

Question 22

A radiopaque area on a film is

A) dark
B) light
C) sharp
D) fuzzy

Question 23

A herringbone film is the result of improper

A) patient positioning
B) processing
C) PID placement
D) film placement

Question 24

Film contrast is

A) the amount of detail seen in a film
B) the amount of black seen in a film
C) black and white shade variations
D) outline sharpness and clarity

Question 25

In the paralleling technique, the film is placed parallel to the

A) ala-tragus line
B) long axis of the tooth
C) central beam
D) sagittal plane

Question 26

The XCP is used in

A) developing films
B) placing films
C) mounting films
D) none of the above

Question 27

Reticulation is caused by

A) temperature extremes during processing
B) light leaks in the darkroom
C) developing the film too long
D) too much radiation during exposure

Question 28

The purpose of hyposulfite of sodium in film developing is to

A) aid other chemicals in the processing activity
B) remove silver grains from the film
C) swell the film emulsion
D) remove other chemicals from the film

Question 29

The error that occurs when the PID is angulated too high is called

A) lightening
B) darkening
C) foreshortening
D) penumbra

Question 30

To avoid the herringbone effect

A) use more mA
B) use less mA
C) put the raised dot toward the PID
D) put the raised dot away from the PID

Question 31

Film contrast can be adjusted by changes in

A) mA
B) kVp
C) exposure time
D) all of the above

Question 32

A panoramic radiograph shows

A) the bones of the skull and the entire dentition
B) all structures associated with a quadrant of teeth
C) all structures associated with an arch of teeth
D) the entire dentition and surrounding structures

Question 33

Cone cutting occurs when

A) there is too much vertical angulation
B) temperature extremes occur during processing
C) the film packet is backward
D) the PID is not centered on the film

Question 34

All of the following films can be considered extraoral EXCEPT

A) occlusal
B) cephalometric
C) panoramic
D) periapical

Question 35

In the bisecting the angle technique, the bisected angle is formed by

A) the plane of the film and the long axis of the tooth
B) the ala-tragus line and the sagittal plane
C) the central beam and the tooth
D) none of the above

Question 36

When the central beam is not perpendicular to the film front, which of the following is most likely to occur?

A) foreshortening
B) elongation
C) darkening
D) overlapping

Question 37

All of the following films can be considered intraoral radiographs EXCEPT

A) periapical
B) panoramic
C) occlusal
D) bitewing

Question 38

Poor definition of forms is called

A) fog
B) reticulation
C) penumbra
D) herringbone effect

Question 39

Reticulation looks like

A) clear film
B) dark film
C) light film
D) stained glass

Question 40

Penumbra is caused by

A) old film
B) hot solutions
C) light leaks
D) movement

Question 41

The type of imaging that requires no chemical processing is called __________.

Question 42

The purpose of the collimator is to

A) avoid stray radiation
B) regulate the size of the primary beam
C) increase the number of available electrons
D) convert the electron force to photons

Question 43

A symptom of radiation overdose is

A) erythema
B) phantom pain
C) focal spots
D) none of the above

Question 44

An error that results in a fuzzy image, possibly due to patient movement, is called

A) fog
B) penumbra
C) herringbone effect
D) reticulation

Question 45

Redness of the skin caused by an overdose of radiations is called

A) erythema
B) edema
C) arrthymia
D) hyperthermia

Question 46

The purpose of asking the patient about when and what type of dental x-rays were last taken is to avoid

A) acute radiation exposure
B) chronic radiation exposure
C) using a lead shield/apron
D) stray radiation

Question 47

A digital image can add depth elements called __________, which give a more three-dimensional appearance.

A) pixels
B) voxels
C) volumetrics
D) coulomb

Question 48

The radiographic error of overlapping is due to improper

A) vertical angulation
B) horizontal angulation
C) negative angulation
D) positive angulation

Question 49

A radiograph that captures the complete dentition and surrounding structures is called a

A) cephalometric
B) pericapical
C) occlusal
D) panoramic

Question 50

What is the unit of measurement used to determine the amount of biological absorption effects on body tissues by different types of radiation energy?

A) rad
B) rem
C) rbe
D) MPD