RRadiographic Positioning Workbook Ch 1 (Digital imaging Characteristics

matrix

Columns and rows of pixels make up the ______

Increase

What effect does increase in pixels have on spatial resolution?

contrast

the difference in brightness between light and dark areas of an image

True

Changes in mA’s do not have a primary controlling effect on digital image brightness

Contrast resolution

A digital imaging system’s ability to distinguish between similar tissues is termed:

Application of processing algorithms

Radiographic contrast in the digital image is primarily affected by

Detective quantum efficiency (DQE)

WHat describes how efficiently the digital image receptor detects and converts x-ray energy into an image signal

1

What is the perfect DQE

Intensity of x-ray beam

amount of tisue irradiated

type and thickness of tissues

3 factors that influence scatter

True

Digital imaging systems have a wide dynamic range

exposure latitude

term that describes the acceptable level of expsoure that produces the desired image quality

noise

a random disturbance that obscures or reduces clarity is the definition for _____

signal-to-noise ratio

SNR is the acronym for

Low

When insufficient mA’s is applied in the production of a digital image, it produces a ___ SNR image

Mottle

another term for image noise

Electronic noise

Secondary factor related to noise resulting from the electrical system , nonuniformity of teh image receptor or power fluctuations