Deck 15: Digital Imaging

Question 1

Identify the main disadvantage of digital imaging:

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

Answer 1

bulky,rigid sensors.

Question 2

In the optical scanning method,one starts with the digital radiograph.

Answer 2

False

Question 3

A digital image is composed of structurally ordered areas called:

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

Answer 3

pixels.

Question 4

The computer used for digital imaging:

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

Question 5

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

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

Question 6

The cost of a digital imaging unit is approximately $15,000.

Question 7

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

A)the original films.
B)transmitted images.
C)a telephone description.
D)a hard copy of the digital radiograph.

Question 8

What is the function of the laser with a storage phosphor sensor?

A)Digitizes the image.
B)Stores the x-ray energy.
C)Transmits the image to the computer.
D)Digitizes the image and Stores the x-ray energy.

Question 9

One of the advantages of digital radiography over film is faster image acquisition.

Question 10

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

A)6 feet from the source of radiation.
B)2 feet from the source of radiation.
C)1 foot from the source of radiation.
D)3 feet from the source of radiation.

Question 11

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 12

"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)Storage phosphor system
C)Indirect digital radiography
D)Optically scanned digital imaging

Question 13

In a digital image,you could expect to have:

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

Question 14

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

Question 15

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

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

Question 16

Two types of direct sensors are CMOS and CCD.

Question 17

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

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

Question 18

Digital imaging allows for manipulation of the image.All of the following can be manipulated EXCEPT one.Which one is the EXCEPTION?

A)The image can be darkened.
B)The image can be lightened.
C)The image can be magnified.
D)Elongation or foreshortening can be corrected.

Question 19

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 20

Identify the most critical part of a digital radiography system:

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