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RAD 370 Digital Imaging Final Exam with Complete Solutions
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RAD 370 Digital Imaging Final Exam with Complete Solutions
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RAD 370 Digital Imaging Final Exam withComplete Solutions
A wraparound image or image aliasing occurs when:
- sampling occurs twice per cycle
- spatial frequency is less than the Nyquist frequency
- sampling occurs less than twice per cycle
- spatial frequency is equal to the Nyquist frequency Correct Ans-sampling occurs less than
twice per cycle
Automatic rescaling means that images are produced, regardless of the amount of exposure,
with:
- uniform size and shape
- uniform contrast and density
- variable size and shape
- variable contrast and density Correct Ans-uniform contrast and density
A look-up table is not used as a reference to:
- set appropriate kilovoltage peak and milliampere seconds values
- evaluate raw luminescence values
- correct luminescence values
- provide appropriate brightness and contrast Correct Ans-set appropriate kVp and mAs
values
If all of the shades were left an image after processing, the contrast would be:
- too low
- too high
- sufficient
,- unaffected Correct Ans-too low
The improper algorithm application may result in:
- enhanced contrast
- improved resolution
- repeat examinations
- degradation of the image Correct Ans-degradation of the image
The more manipulation of the image, the greater the:
- amount of resolution
- loss of information
- quality of the image
- radiologist manipulation Correct Ans-loss of information
Amplification of the frequencies of the areas of interest is known as:
- algorithm application
- center enhancement
- edge enhancement
- masking Correct Ans-edge enhancement
Suppressing frequencies in the areas of interest is known as:
- algorithm application
- center enhancement
- edge enhancement
- masking Correct Ans-masking
Low-pass filtering is also known as:
, - evening
- smoothing
- masking
- marking Correct Ans-smoothing
High-pass filtering is useful for enhancing:
- small structures
- fine bone tissues
- large bony structures
- organs and soft tissue Correct Ans-organs and soft tissue
Averaging the frequency of each pixel with surrounding pixel values to remove high frequency
noise is called:
- high-pass filtering
- low-pass filtering
- edge enhancement
- noise enhancement Correct Ans-low-pass filtering
Window width controls the ratio of black and white, also known as:
- window
- level
- contrast
- matrix Correct Ans-contrast
Excessive light entering the eye when viewing an image is known as _______ glare:
- veil
- window
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