Chapter 25 Digital Imaging

Digitize

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

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

True

True or False Digital subtraction is is an advantage in digital imaging because distracting background information is eliminated from the image

True

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

True

True or False The manipulation of original digital images can be considered a legal issue

True

True or False The preferred exposure method for intraoral digital imaging is the paralleling technique

True

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

True

The image receptor found in the intraoral sensor is termed a. CCD b. pixel c. Semiconductor chip d. Software

a. CCD

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

b. The sensor is more sensitive to x-rays

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

c. 1987

All of the following are advantages of digital imaging except: 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

Digital imaging systems can be used for which images: a. Bite-wing b. Panoramic c. Cephalometric d. All of the above

d. All of the above

Sensor

A detector that is used to capture the dental image.

Pixel

A discrete unit of information; a picture element.

Digital radiography

A filmless imaging system; a method of capturing an image using a sensor, breaking the image into electronic pieces, and presenting and storing the image using a computer

Storage phosphor imaging

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.

Direct digital imaging

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

Digital subtraction

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

Charged-coupled device

An image receptor found in the intraoral receptor

True or False Digital imaging requires more x-radiation than conventional radiography`

False

True or False In digital imaging, the term used to describe the picture that is produced is radiograph

False

True or False All intraoral sensors can be heat-sterilized after use

False