Chapter 27 Contrast

Question 1

Contrast

Answer 1

One of the two properties that comprise visibility of detail. Visibility of detail refers to the fact that the image is visible to the human eye only because sufficient contrast exists to permit the structural details to be perceived.

Question 2

Differential Attenuation

Answer 2

Causes signal differences to the digital receptor and kVp is important for the desired differential attenuation through the patient for a given examination.

Question 3

Dynamic Range:

Answer 3

The term dynamic range describes the concept of contrast as it is displayed on a monitor for digital images, is it the proper term for the range of brightness of the display monitor light emission. Dynamic range can be applied for all radiographic images.

Question 4

Grayscale:

Answer 4

The number of shades of gray in a radiographic image.

Question 5

Image Receptor Contrast:

Answer 5

The total amount of contrast acquired from the image receptor.

Question 6

Scale of Contrast:

Answer 6

The number of useful visible densities or shades of gray.