Topic 3 Digital Imaging quiz

With digital imaging, the term ____ is used to describe the pictures that are produced.

Image

Advantages of the use of digital imaging include which of the following?

Image storage and communication are easier with digital networking, and Images can be electronically transmitted to other dental professionals.

Advantages of digital imaging include:

Increased speed of image viewing.

____ digital imaging involves digitizing an existing x-ray film using a CCD camera. Indirect digital imaging is ____ to direct digital imaging.

Indirect; inferior

The electrons that compose the silicon charge-coupled device (CCD) can be visualized as being divided into an arrangement of blocks or picture elements known as:

Pixels

Sensors that cannot be sterilized:

Require complete coverage with disposable plastic sleeves for each patient.

How does the CMOS detector differ from the CCD detector?

The CMOS detector is silicon-based and differs from the CCD detector in the way that the pixels are read.

A primary advantage to digital imaging is the superior gray-scale resolution that results. Digital imaging uses up to 32 shades of gray.

The first statement is true; the second statement is false.

It is questionable whether digital images can be used as evidence in lawsuits because:

The original digital image can be enhanced.

Advantages of the use of digital imaging include which of the following?

The size of the digitized image makes it attractive as a patient education tool, There is an opportunity for an increase in interactive dialogue between the patient and the radiographer, and The use of visualization can increase the patient's understanding of the disease process.

Storage phosphor imaging:

Uses a reusable imaging plate.

In order to be used for digital imaging, the x-ray unit timer must be adapted to allow exposures in a time frame of ____ of a second.

1/100

Conventional dental x-ray film has a resolution of ____ lp/mm.

12 to 20

The human eye can appreciate ____ shades of gray.

32

Exposure times are ____ than that required for conventional radiography.

50% to 90% less

Digital imaging uses ____ to produce an image.

An electronic sensor and computerized imaging system

The images are cleared from the storage phosphor imaging plates by:

Being exposed to viewbox light for several minutes.

Given that the human eye can resolve 8 to 10 lp/mm, a CCD system is inadequate for diagnosis of dental disease. The majority of the research has shown that the traditional radiographs perform at least as well as digital images and at times even better.

Both statements are false.

Most digital imaging systems use a ____ as the x-radiation source.

Conventional dental x-ray unit

With the feature of ____, the gray-scale of the diagnostic image is reversed so that radiolucent images appear white and radiopaque images appear black.

Digital subtraction

A sensor with a fiberoptic cable linked to the computer is placed into the mouth of the patient and exposed to x-radiation. This is an example of:

Direct digital imaging.