Digital Imaging Chapter 25 For Quiz

Question 1

digital imaging uses an electronic sensor as well as specialized computer software that produces images almost ___ on a computer monitor.

Answer 1

instantly

Question 2

Radiographic image produced by conventional film.

Answer 2

Analog image

Question 3

Number of possible gray-scale combinations for each pixel (e.g., 8 bit-depth image has gray-scale combination of 2 8 , which equals 256 shades of gray).

Answer 3

Bit-depth image

Question 4

Solid-state silicon chip detector that converts light or x-ray photons into an electrical charge or signal; in digital imaging, CCD is found in the sensor.

Answer 4

Charge-couple device (CCD)

Question 5

Filmless imaging system; a method of capturing an image using a sensor, breaking it into electronic pieces, and presenting and storing the image using a computer and related imaging software.

Answer 5

Digital Imaging

Question 6

An image composed of pixels that can be stored in a computer.

Answer 6

Digital Image

Question 7

One feature of digital imaging; a method of reversing the gray scale as an image is viewed; radiolucent images (normally black) appear white, and radiopaque images (normally white) appear black.

Answer 7

Digital Subtraction

Question 8

In digital imaging, to convert an image into a digital form that, in turn, can be processed by a computer.

Answer 8

Digitize

Question 9

Method of obtaining a digital image, in which an intraoral sensor is exposed to x-radiation to capture a dental image that can be viewed on a computer monitor.

Answer 9

Direct digital imaging

Question 10

Method of obtaining a digital image, in which a sensor is scanned following exposure to x-radiation and then converted into a digital form that can be viewed on a computer monitor.

Answer 10

Indirect Digital Imaging

Question 11

Measurement used to evaluate the ability of the computer to capture the resolution (or detail) of an image.

Answer 11

Line pairs/millimeter (lp/mm)

Question 12

A discrete unit of information. In digital electronic images, digital information is contained in, and presented as, discrete units of information; also termed picture element .

Answer 12

Pixel

Question 13

In digital imaging, a receptor that is used to capture an intraoral or extraoral image.

Answer 13

Sensor

Question 14

Method of obtaining a digital image in which the image is recorded on a phosphor-coated plate and then placed into an electronic processor, where a laser scans the plate and produces an image on a computer monitor.

Answer 14

Storage phosphor imaging

Question 15

Uses of digital imaging include the following:

Answer 15

• To detect lesions, diseases, and conditions of teeth and surrounding structures that cannot be detected clinically
• To confirm or classify suspected disease
• To localize lesions or foreign objects
• To provide information during dental procedures (e.g., root canal therapy instrumentation and surgical placement of implants)
• To evaluate growth and development
• To illustrate changes secondary to caries, periodontal disease, or trauma
• To document the condition of a patient at a specific point in time
• To aid in the development of a clinical treatment plan

Question 16

The term digital imaging refers to a method of capturing an image using a sensor, ____ the image into electronic pieces, and presenting and storing the image using a computer and imaging software.

Answer 16

breaking

Question 17

Doe digital images have flowing gray shades or a mosaic pattern

Answer 17

mosaic pattern

Question 18

When an electronic charge is produced on a sensor it the signal is __

Answer 18

digitized

Question 19

is a small box, or “well,” into which the electrons produced by the x-ray exposure are deposited.

Answer 19

Pixel

Question 20

is a method of obtaining a digital image using an intraoral sensor that is exposed to x-radiation to transfer information directly to a computer with imaging software.

Answer 20

Direct Digital Imaging

Question 21

is a method of obtaining a digital image from a sensor following exposure to x-radiation by using a scanner to convert information into a digital form so that it can then be viewed on a computer monitor. Unlike direct digital imaging, there is an extra step—the scanning.

Answer 21

Indirect Digital Imaging

Question 22

Advantages of Digital Imaging

Answer 22

1. Superior gray-scale resolution
2. Reduced exposure to x-radiation
3. Increased speed of image viewing
4. Lower equipment and film cost
5. Increased efficiency
6. Enhancement of diagnostic image
7. Effective patient education tool
8. Eco-friendly alternative

Question 23

Disadvantages of Digital Imaging

Answer 23

1. Initial setup costs
2. Image Quality
3. Sensor size and thickness
4. Infection Control
5. Wear and tear
6. Legal issues