Each digital image is formed by two-dimensional elements termed:
pixels
Highly complex mathematical formulas used in creating the digital image are termed:
Algorithms
True/False:
Changes in kV have little impact on patient dose with digital imaging.
False
True/False:
kV and mAs do not have the same direct effect on image quality with digital imaging as they do with IR screen imaging.
True
True/False:
A wide exposure latitude associated with digital imaging systems will reduce repeat exposures.
True
The intensity of light that represents the individual pixels in the image on the monitor is termed:
Brightness
The primary controlling factor of contrast in the digital film image is:
processing algorithms
The greater the bit depth of a digital system, the greater the:
contrast resolution
What term describes the minimum pixel size that can be displayed by a monitor?
Display pixel size
True/False:
OID and SID have little impact on spatial resolution of the digital image.
False
True/False:
The current range of spatial resolution for digital general radiographic imaging is between 2.5 to 5 lp/mm.
True
A numeric value that is representative of the exposure the image receptor received is termed:
Exposure Indicator
Random disturbance that obscures or reduces clarity is:
noise
True/False:
If an acceptable exposure indicator range is between 2.0 and 2.4, an exposure indicator of 4.0 would indicate overexposure.
True
True/False:
A high SNR results when insufficient mAs is used in creating a digital image.
False
Which of the following factors will result in an increase in noise?
excessive mAs
scatter radiation
high kV
decrease in pixel size
scatter radiation
Changing or enhancing the electronic image to improve its diagnostic quality describes:
post processing
__________ is the application of specific image processing that alters the pixel values across the image so as to present a more uniform image appearance.
Equalization
Window width controls the ________ of the digital image
contrast
True/False:
Post-processing can correct for a low SNR image.
False