Deck 4: Image Receptors

Question 1

Identify the film that will reduce the most radiation exposure.

A)B
B)C
C)E
D)F

Answer 1

F

Question 2

The lead-foil backing is included in the intraoral film packet:

A)to hold the film in place.
B)to protect the film from saliva.
C)to absorb back-scattered radiation.
D)to help keep the film packet light-tight.

Answer 2

to absorb back-scattered radiation.

Question 3

All of the following may cause film fog EXCEPT one.Which one is the EXCEPTION?

A)Exhausted processing solutions
B)Improper safelight conditions
C)Unprotected storage of films
D)Emulsion of silver halide

Answer 3

Emulsion of silver halide

Question 4

When the x-ray photons strike the phosphors of the intensifying screen light,photons are produced.

Question 5

In direct digital imaging,the photostimulable phosphor (PSP)plate is used as the image receptor and consequently is used to produce an instantaneous radiographic image.In indirect digital imaging,the sensor is used as the image receptor.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second statement is false.
D)The first statement is false,the second statement is true.

Question 6

Intraoral film packets come in five basic sizes,the higher the designated number,the smaller the film packet.

Question 7

Film cassettes can be either rigid or flexible.

Question 8

Rare earth intensifying screens differ from calcium tungstate screens in all of the following characteristics EXCEPT one.Which one is the EXCEPTION?

A)Produce green light
B)The image definition
C)Faster and require less exposure
D)Must be used with compatible film

Question 9

The main advantage of intensifying screens is:

A)quicker developing.
B)better image definition.
C)less radiation to the patient.
D)easier to prepare the cassette.

Question 10

Taking films to be duplicated out of the mounts:

A)is never necessary.
B)makes processing easier.
C)improves the detail of the duplicates.
D)prolongs the life of the duplicating device.

Question 11

Duplicating film does not have an orientation dot on the emulsion to identify the patient's right or left side.Intensifying screens do not have an orientation dot on the screen to identify the patient's right or left side.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second statement is false.
D)The first statement is false,the second statement is true.

Question 12

The dental x-ray film packet is composed of all of the following EXCEPT one.Which one is the EXCEPTION?

A)X-ray film
B)Lead-foil backing
C)Black paper film wrapper
D)Outer plastic package wrapper

Question 13

Film speed is determined by all of the following EXCEPT one.Which one is the EXCEPTION?

A)The fluorescence coating
B)The thickness of the emulsion
C)The presence of radiosensitive dyes
D)The size of the silver halide crystals

Question 14

Which of the following is a direct digital sensors used in dental digital imaging?

A)Active sensor
B)Charge-coupled device
C)Complementary conductor
D)Photostimulable phosphor plate

Question 15

The plot of film density versus exposure time is called a H & D curve.

Question 16

All dental radiology film have an orientation dot on the white side of the film.This convex-concave area indicates the side of the film that should be facing the tooth.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second statement is false.
D)The first statement is false,the second statement is true.

Question 17

In indirect digital imaging,the sensor is used as the image receptor.

Question 18

Duplicating film:

A)has emulsion on both sides.
B)has a direct positive emulsion.
C)does not need safelight conditions.
D)necessitates the use of x-ray photons for exposure.

Question 19

A double film packet requires more exposure time than the single-film packet.This increases the overall x-radiation exposure to the patient.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second statement is false.
D)The first statement is false,the second statement is true.

Question 20

A film that has been fogged will have:

A)increased contrast.
B)decreased contrast.
C)increased radiopacity.
D)decreased radiopacity.