CH3: Digital Radiographic Image Processing
and Manipulation
A graphic representation of a digital image is called what? -
histogram
The useful signal is determined during which part of image processing? -
Image sampling
T/F: The Nyquist Theorem states that the sampling frequency must be less than twice the frequency of
the input signal. -
False
T/F: Aliasing occurs when the sampling frequency is not greater than twice the frequency of the input
signal. -
True
In digital projection radiography, what process is used to normalize an image that has been taken worth
to great of an exposure? -
Automatic rescaling
T/F: The look-up table that is used to determine the brightness and contrast of an image is unique for
each anatomic part. -
True
Which processing technique will amplify particular known frequencies in an image while suppressing
others? -
Edge enhancement, high- pass filtering, and masking
T/F: Window width controls the brightness of the image on the display. -
False
T/F: Shuttering the digital image will reduce the exposure to the patient -
False
Which processing parameter will put together will put together multiple images into one single image
for display? -
Image stitching
Recognition of exposure data involves processing what? -
only the optimal density exposure range and it generates a graphic representation or
histogram of the optimal densities
What happens after the plate is scanned and the image location and orientation is determined? -
