LP2 Chapter 25

Question 1

What is a small detector that is placed intraorally to capture the radiographic image?

Answer 1

Sensor

Question 2

What is an image receptor found in the intraoral sensor called?

Answer 2

charge-coupled device

Question 3

What is a form of indirect digital imaging in which the image is recorded on phosphor-coated plates and then placed into an electronic processor where a laser scan the plate and produces an image on a computer screen.

Answer 3

storage phosphor imaging

Question 4

The process that converts an image into digital form, which, in turn, can processed by a computer is called what?

Answer 4

digitize

Question 5

What method is used to obtain a digital image in which and intraoral sensor is exposed to x-rays to capture a radiographic image that can be viewed on a computer monitor.

Answer 5

direct digital imaging

Question 6

What is a discrete unit of information; picture element called?

Answer 6

Pixel

Question 7

What is the method of obtaining a digital image, in which an existing radiograph is scanned and converted into a digital form using a CCD camera?

Answer 7

indirect digital imaging

Question 8

What is the method called of reversing the gray scale as a digital image is viewed?

Answer 8

Digital subtraction.

Question 9

A filmless imaging system; a method of capturing a radiographic image using a sensor, breaking the image into electronic pieces, and presenting and storing the image using a computer is called what?

Answer 9

Digital radiography

Question 10

True or False; in digital radiography, the term used to describe the picture that is produced is radiograph.

Answer 10

false

Question 11

True or False; Digital radiography requires more x-radiation that conventional radiography.

Answer 11

False

Question 12

True or False; The x-radiation source used in most digital radiography systems is a conventional dental x-ray unit.

Answer 12

True

Question 13

T or F; Compared with film emulsion, the pixels used in digital radiography are structured in an orderly arrangement.

Answer 13

True

Question 14

T or F; All intraoral sensors can be heat sterilized after use.

Answer 14

False

Question 15

T or F; The preferred exposure method for intraoral digital radiography is the paralleling technique.

Answer 15

True

Question 16

T or F; One advantage of a digital radiography system is the superior gray-scale resolution that results.

Answer 16

True

Question 17

T or F; Digital subtraction is an advantage in digital radiography because distracting background information is eliminated from the image.

Answer 17

True

Question 18

T or F; the manipulation of the original digital images can be considered a legal issue.

Answer 18

True

Question 19

When was digital radiography introduced to dentistry?

Answer 19

1987

Question 20

What can digital radiography be used for?

Answer 20

1. detecting conditions of teeth and surrounding structures
2. Evaluating growth and development of the jaws
3. Confirmation of suspected disease.

Question 21

Why does digital radiography require less radiation then conventional radiography?

Answer 21

The sensor is more sensitive to x-rays.

Question 22

What method obtains the digital image similar to scanning a photo to a computer screen?

Answer 22

Indirect digital imaging.

Question 23

What is the image receptor found in the intraoral sensor called?

Answer 23

CCD

Question 24

What does the CCD contain that makes it sensitive to light or x-rays?

Answer 24

Silicon

Question 25

What can digital radiography systems be used for?

Answer 25

Intra- and Extra- oral images

Question 26

What are the advantages of digital radiography?

Answer 26

Digital subtraction
Ability to enhance the image
Patient education

Question 27

What are the disadvantages of digital radiography?

Answer 27

The size of the intraoral sensor.