SOD THEORY 2 EXAM PREP TEST BANK
VERIFIED QUESTIONS AND CORRECT
ANSWERS
●● What is the relationship between FOV and pixel size in a fixed
matrix?
Answer: Directly related
FOV increases, pixel size increases
FOV decreases, pixel size decreases
●● What is the relationship of matrix size and pixel size in fixed FOV?
Answer: Inversely related
matrix size increases, pixel size decreases
matrix size decreases, pixel size increases
●● Pixel Size formula
Answer: Pixel size = FOV/matrix size
convert FOV inches to mm (1 in = 25.4mm)
,●● Matrix
Answer: Combination of rows and columns (array) of small 'picture
elements'
larger matrix = improved spatial resolution.
●● Pixels
Answer: Smallest component of matrix measured in microns,
representing a single brightness level.
Decreasing pixel pitch increases spatial resolution
●● Pixel pitch
Answer: Distance between pixels measured from the center of one pixel
to the center of an adjacent pixel
Increasing pixel density increases spatial resolution
●● Pixel density
Answer: Number of pixels per unit area
●● Bit Depth
, Answer: Total number of possible brightness levels that can be assigned
to any pixel in the image
Expressed as 2^n
Ex. 12 bits would have 2^12 shades of gray
●● How does bit depth relate to contrast resolution and brightness
levels?
Answer: Increased bit depth = more contrast resolution
Increased bit depth = more brightness levels
●● Improving Spatial Resolution
Answer: Increasing pixel density
Decreasing pixel pitch
Decreasing pixel size
Increasing spatial frequency
●● Spatial Frequency
Answer: Unit of line pairs per millimeter (lp/mm) or number of details
that can fit into a given space.
●● Spatial frequency relationship to spatial resolution
VERIFIED QUESTIONS AND CORRECT
ANSWERS
●● What is the relationship between FOV and pixel size in a fixed
matrix?
Answer: Directly related
FOV increases, pixel size increases
FOV decreases, pixel size decreases
●● What is the relationship of matrix size and pixel size in fixed FOV?
Answer: Inversely related
matrix size increases, pixel size decreases
matrix size decreases, pixel size increases
●● Pixel Size formula
Answer: Pixel size = FOV/matrix size
convert FOV inches to mm (1 in = 25.4mm)
,●● Matrix
Answer: Combination of rows and columns (array) of small 'picture
elements'
larger matrix = improved spatial resolution.
●● Pixels
Answer: Smallest component of matrix measured in microns,
representing a single brightness level.
Decreasing pixel pitch increases spatial resolution
●● Pixel pitch
Answer: Distance between pixels measured from the center of one pixel
to the center of an adjacent pixel
Increasing pixel density increases spatial resolution
●● Pixel density
Answer: Number of pixels per unit area
●● Bit Depth
, Answer: Total number of possible brightness levels that can be assigned
to any pixel in the image
Expressed as 2^n
Ex. 12 bits would have 2^12 shades of gray
●● How does bit depth relate to contrast resolution and brightness
levels?
Answer: Increased bit depth = more contrast resolution
Increased bit depth = more brightness levels
●● Improving Spatial Resolution
Answer: Increasing pixel density
Decreasing pixel pitch
Decreasing pixel size
Increasing spatial frequency
●● Spatial Frequency
Answer: Unit of line pairs per millimeter (lp/mm) or number of details
that can fit into a given space.
●● Spatial frequency relationship to spatial resolution
