Deck 9: Infection Control

Question 1

The size and number of pixels that make up a digital image determine the spatial resolution. Spatial resolution is measured in line pairs.

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

Answer 1

Both statements are true.

Question 2

Which digital image receptor uses rare earth-coated plates to store the x-ray energy until stimulated by a laser beam?

A) Charge-coupled device
B) Photostimulable phosphor
C) Complementary metal oxide semiconductor

Answer 2

Photostimulable phosphor

Question 3

Each of the following statements regarding digitization is correct EXCEPT one. Which one is the EXCEPTION?

A) The quality of an indirect digital image has the same quality as a direct digital image.
B) Digitization converts conventional film-based radiographs to digital images.
C) Transparency adapters for digitization of radiographs are available for flatbed scanners.
D) Digitization can be accomplished by taking a digital photograph of a film-based radiograph.

Answer 3

The quality of an indirect digital image has the same quality as a direct digital image.

Question 4

Which of the following is FALSE regarding a digital sensor?

A) It requires a different technique than a film packet.
B) It replaces an intraoral film packet.
C) It may be wired or wireless.
D) It is available in sizes similar to film packets.

Question 5

Which of these is NOT an advantage of digital imaging over film-based imaging?

A) There is less radiation exposure.
B) It eliminates the need for a darkroom.
C) It is easier to place into position in the oral cavity.
D) Images may be manipulated to enhance interpretation.

Question 6

Which of the following digital imaging technologies converts film-based images to digitized images?

A) Storage phosphor imaging
B) Charge-coupled device
C) Metal oxide semiconductor
D) Digitization

Question 7

Each of the following statements regarding pixels is correct EXCEPT one. Which one is the EXCEPTION?

A) The more pixels in an image, the higher the resolution and the sharper the image.
B) The number and size of pixels determines the spatial resolution of an image.
C) When the number of pixels is low, the image appears to have jagged edges.
D) A pixel with a stored number of 0 would be pure white.

Question 8

How many shades of gray can the unaided human eye detect?

A) 32
B) 320
C) 3,200
D) 32,000

Question 9

Which of the following features of digital imaging software currently available provides the best aid to interpreting digital images?

A) Density/contrast manipulation
B) Colorization
C) Embossing
D) Reversing the gray scale

Question 10

Which of these is used in indirect digital imaging?

A) Photostimuable phosphor
B) Complementary metal oxide semiconductor
C) Charge-coupled device
D) Artificial intelligence

Question 11

Which of the following is NOT a type of digital image receptor?

A) Photostimulable phosphor
B) Scanner
C) Complementary metal oxide semiconductor
D) Charge-coupled device

Question 12

The more pixels in a digital image, the:

A) lower the resolution and the sharper the image.
B) lower the resolution and the less sharp the image.
C) higher the resolution and the sharper the image.
D) higher the resolution and the less sharp the image.

Question 13

Each of the following statements regarding photostimulable phosphor plates is correct EXCEPT one. Which one is the EXCEPTION?

A) They use rare earth-coated plates.
B) The plates are disposable.
C) They store x-ray energy until stimulated by a laser beam.
D) They are similar to film-based radiography in that they must be "developed" later.

Question 14

Each of the following is a use of digital radiography EXCEPT one. Which one is the EXCEPTION?

A) To evaluate growth and development.
B) To image soft tissues of the head and neck region.
C) To detect, confirm, and classify oral diseases.
D) To detect and evaluate trauma.

Question 15

Which of these is NOT a limitation of digital imaging?

A) The need for plastic infection control barriers may hinder placement intraorally.
B) Smaller overall dimensions limit recording area.
C) The initial costs to convert from film-based imaging can be expensive.
D) Images can be manipulated.

Question 16

Each of the following statements regarding digital radiography is correct EXCEPT one. Which one is the EXCEPTION?

A) In film-based radiography, the radiographer "takes a radiograph," while in digital imaging, the radiographer "acquires an image."
B) A digital image has no physical form.
C) Digital radiography systems are limited to intraoral systems.
D) Indirect digital imaging replaces film with a photostimulable plate.

Question 17

How much less radiation exposure is a digital radiograph purported to be over a fast speed film-based radiograph?

A) 0 to 20 percent
B) 0 to 30 percent
C) 0 to 50 percent
D) 0 to 80 percent

Question 18

Which of these statements is FALSE?

A) The digital image is composed of structurally ordered pixels.
B) Each pixel is a single dot in a digital image.
C) Pixel is short for "pixel element."
D) Each pixel has a number from 1 to 10.

Question 19

What determines the quality of a digital image?

A) Gray scale
B) Spatial resolution
C) Combination of pixels
D) All of the above

Question 20

How many gray levels can a computer monitor display?

A) 8
B) 32
C) 256
D) 65,500

Question 21

If more radiation reaches the digital sensor, the gray value will decrease.

Question 22

The lower the line pairs per millimeter, the better the spatial resolution.

Question 23

Using digital radiographic software to detect caries is an example of artificial intelligence.

Question 24

Solid-state digital sensors are available wired of wireless.

Question 25

Digitization converts radiographs obtained with traditional film-based radiography to digital images.

Question 26

Most digital imaging systems cannot be used with conventional x-ray machines.

Question 27

Photostimulable phosphor plates are light-sensitive.

Question 28

A digital image is the same as an analog image.

Question 29

There are two methods of acquiring a digital image.

Question 30

The digital technology used in digital radiographic sensors is similar to that used in digital cameras and computer memory chips.

Question 31

CMOS and CCD are types of direct digital sensors.

Question 32

Digitization uses a computer to superimpose two standardized radiographic images, causing the like areas of the image to "cancel" each other out, leaving only the changes visible.

Question 33

Each pixel is a single dot in a digital image.

Question 34

Digital radiography requires a computer and monitor to capture and view an image.

Question 35

x and y coordinates are used by the computer to reconstruct digital data obtained by the sensor into an image that can be viewed on the computer monitor.

Question 36

Line pairs refers to the total number of shades of gray visible in an image.

Question 37

The discernable separation of closely adjacent image details is referred to as contrast.

Question 38

Film-based radiographs contain analog data.

Question 39

Direct digital imaging does not use film.

Question 40

CCD and CMOS digital image receptors very closely resemble film and capture x-ray energy in a manner similar to film.

Question 41

By what mechanism are PSP plates reusable?

Question 42

What is the purpose of digital imaging measuring software?

Question 43

What are the advantages of digital radiography?

Question 44

What is digital subtraction?

Question 45

Are digital radiography systems limited to intraoral images?

Question 46

How can two images, taken over time, be compared using digital subtraction?

Question 47

Do digital imaging systems necessarily require a computer and monitor to capture and view an image?

Question 48

What is the digital equivalent of film fog?

Question 49

What is the difference between a digital image and a radiograph?

Question 50

Which requires less radiation to produce an image, digital or conventional film-based radiographs?