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Preprocessing and Postprocessing Questions With Complete Solutions
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Preprocessing and Postprocessing Questions With Complete Solutions
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Preprocessing and Postprocessing Questions With CompleteSolutions
"Dead" pixels in the image caused by the failure of individual
detector elements (dexels) can
be filled in with data by averaging the pixel values surrounding
them. This mathematical
process is called:
a. Interpolation
b. Extrapolation
c. Median summing
d. Alternative algorithms Correct Answers Interpolation
A histogram analysis algorithm that begins storing pixel values
only when a certain
minimum number of pixels holding these values is present is
a(n) __________ algorithm:
a. threshold
b. alternate
c. segmentation
d. procedural Correct Answers threshold
A list of the pixel values that make up the "ideal" histogram
shape for an image of a
particular body part is called a permanent:
a. exposure indicator (EI)
b. look-up table (LUT)
c. volume of interest (VOI)
d. rescaling chart
e. normalization table Correct Answers look-up table (LUT)
, A reference histogram that evolves by averaging it with the
previous 50 procedures is called
a(n) _________ histogram:
a. neural
b. a priori
c. median averaging
d. interpolation Correct Answers neural
A submatrix that is passed over the original image matrix
executing a mathematical function
on it is called a(n):
a. Subroutine
b. Subpixel
c. Interpolation
d. Kernel Correct Answers Kernel
After histogram analysis and rescaling are completed, the
computer "knows" where to insert
these modified values in the image because prior to these
operations, a log was kept
recording each:
a. Pixel's contrast level
b. Physical attenuation coefficient
c. Value's pixel count
d. Value's location in the spatial matrix Correct Answers
Value's location in the spatial matrix
An algorithm designed to accentuate soft tissue densities will
locate the values of interest
(VOI) on the histogram:
a. higher
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