RAD Quiz 8

A wide dynamic range means that a wide range of exposure settings will produce an image of acceptable density and contrast. A narrow dynamic range means that the exposure settings must be relatively precise, not slightly high and not slightly low in order to capture an image at an acceptable density and contrast.

• Both statements are true.

• Both statements are false.

Each of the following is a use of digital radiography except one. Which one is the exception?

• To image soft tissues of the head and neck region

• To detect, confirm, and classify oral diseases

Each of the following statements regarding photostimulable phosphor plates is correct except one. Which one is the exception?

• The plates are disposable.

• They store x-ray energy until stimulated by a laser beam.

Each of the following statements regarding pixels is correct except one. Which one is the exception?

• A pixel with a stored number of 0 would be pure white.

• When the number of pixels is low, the image appears to have jagged edges.

Which of these statements is false?

• Each pixel is a single dot in a digital image.

• Each pixel has a number from 1 to 10.

Which of these is not an advantage of digital imaging over film-based imaging?

• It is easier to place into position in the oral cavity.

• Images may be manipulated to enhance interpretation.

Which of the following is false regarding a digital sensor?

• It replaces an intraoral film packet.

• It requires a different technique than a film packet.

How many shades of gray can the unaided human eye detect?

• 32

• 320

How much less radiation exposure is a digital radiograph purported to be over a fast-speed film-based radiograph?

• 0 to 50 percent

• 0 to 80 percent

Which image receptor is the least sensitive to radiation and requires more radiation exposure to produce an image?

• CCD

• CMOS-APS