Deck 15: Digital Imaging

Question 1

Identify the most critical part of a digital radiography system:

A)x-ray machine
B)digital sensor
C)laptop computer
D)monitor

Answer 1

digital sensor

Question 2

"The sensor is connected by a wire to the computer, and after exposure, the image appears instantly on the monitor" describes which type of digital system?

A)direct digital radiography
B)optically scanned digital imaging
C)storage phosphor system
D)indirect digital radiography

Answer 2

direct digital radiography

Question 3

The cost of a digital imaging unit is approximately __________.

Answer 3

$12,000

Question 4

One of the advantages of digital radiography over film is _________.

Question 5

Identify the advantage of digital imaging that is most attractive to the busy dental practice:

A)reduction in radiation dose
B)more levels of contrast produced
C)faster image acquisition
D)patient education

Question 6

The definition seen on a digital image compared to film is:

A)the same
B)better
C)slightly less
D)exaggerated

Question 7

Digital imaging allows for manipulation of the image. All of the following can be manipulated EXCEPT:

A)the image can be darkened
B)the image can be magnified
C)elongation or foreshortening can be corrected
D)the image can be lightened

Question 8

In the optical scanning method one starts with the __________.

Question 9

To "process" a full-mouth survey and a panoramic image by the storage phosphor technique takes about:

A)5 minutes
B)10 seconds
C)2 minutes
D)1 minute

Question 10

The computer used for digital imaging:

A)cannot be used for other office functions
B)can be used for other functions
C)is the most expensive component of the system
D)is nonessential hardware

Question 11

Digital radiography is now another link to the ________ dental office.

Question 12

Utilizing digital imaging, the operator should be standing at a minimum of:

A)one foot from the source of radiation
B)two feet from the source of radiation
C)six feet from the source of radiation
D)none of the above

Question 13

The wireless system that uses a plate and laser beam scanning to produce an image is known as:

A)direct digital radiography with CCD system
B)direct digital radiography with CMOS system
C)storage phosphor system
D)optically scanned digital imaging

Question 14

One advantage of the storage phosphor technique is that the sensor:

A)is larger
B)is thicker
C)is slightly more flexible
D)is more sensitive to radiation

Question 15

In a digital image, you could expect to have:

A)256 shades of gray
B)100 shades of gray
C)32 shades of gray
D)10 shades of gray

Question 16

Two types of direct sensors are ________ and ________.

Question 17

Compared to D-speed film, the reduction of radiation dose to the patient when using digital imaging is approximately:

A)10%
B)25%
C)50%
D)90%

Question 18

Instead of duplication we can now send the third-party payer:

A)the original films
B)a hard copy of the digital radiograph
C)a telephone description
D)all of the above

Question 19

A digital image is composed of structurally ordered areas called:

A)phosphors
B)signals
C)pixels
D)sensors

Question 20

Identify the main disadvantage of digital imaging:

A)bulky, rigid sensors
B)environmental waste issues
C)infection control
D)lack of definition and detail