Chapter 25

True or False:

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The image receptor found in the intraoral sensor is termed: a. CCD b. pixel c. semiconductor chip d. software

A. CCD

An image receptor found in the intraoral sensor.

A. charge-coupled device

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.

B. digital radiography

The method of obtaining a digital image similar to scanning a photograph to a computer screen is termed: a. direct digital imaging b. indirect digital imaging c. storage phosphor imaging d. CMOS/APS

B. indirect digital imaging

Digital imaging was introduced to dentistry in: a. 1967 b. 1977 c. 1987 d. 1997

C. 1987

A method of reversing the gray scale as a digital image is viewed.

C. digital subtraction

Digital imaging systems can be used for: a. digital subtraction b. the ability to enhance the image c. size of the intraoral sensor d. patient education

C. size of the intraoral sensor

Digital imaging can be used for: a. detecting conditions of teeth and surrounding structures. b. evaluating the growth and development of jaws. c.confirmation of suspected disease. d. all of the above

D. all of the above

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

D. digitize

Digital imaging requires less radiation than does conventional radiography because: a. the sensor is larger b. the sensor is more sensitive to x-rays c. the exposure time is increased d. the pixels sense transmitted light quickly

D. the pixels sense transmitted light quickly

A method of obtaining a digital image in which an intraoral sensor is exposed to x-rays to capture a radiographic image that can be viewed on a computer monitor.

E. direct digital imaging

A method for obtaining a digital image, in which an existing radiograph is scanned and converted into a digital form using a CCD camera.

F. indirect digital imaging

All intraoral sensors can be heat-steralized after use.

False

Digital imaging requires more x-radiation than does conventional radiography.

False

In digital imaging, the term used to describe the picture that is produced is radiograph.

False

A discrete unit of information; a picture element.

G. pixel

A small detector that is placed intramurally to capture the radiographic image.

H. sensor

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 scans the plate and produces an image on a computer screen.

I. storage phosphor imaging

Compared with film emulsion, the pixels used in digital imaging are structured in an orderly arrangement.

True

Digital subtraction is an advantage in digital imaging because distracting background.

True

One advantage of a digital imaging system is the superior gray-scale resolution that results.

True

The manipulation of the original digital images can be considered a legal issue.

True

The preferred exposure method for intraoral digital imaging is the paralleling technique.

True

The x-radiation source used in most digital imaging systems is a conventional dental x-ray unit.

True