Digital imaging characteristics Questions and
Answers 100% Solved
What change will take place as quantum noise decreases? ✔️✔️DQE increases
Which pixel dimensions would create the sharpest image? ✔️✔️4096x4096
Which effects are seen with a high signal-to-noise ratio? ✔️✔️Decreased noise
Increased patient dose
Which is the result of high detective quantum efficiency? ✔️✔️Decreased patient dose
Which factors affect spatial resolution of a computed radiography image? ✔️✔️Laser beam
angle
Sampling frequency
Laser beam diameter phosphor layer thickness
Phosphor layer thickness
Reader translation speed
If the radiologic technologist is looking to adjust/improve the contrast to noise resolution (CNR)
in an image, what adjustment should be made? ✔️✔️Decrease in kVp
Which will result in an increase in contrast to noise resolution (CNR)? ✔️✔️Decrease in kVp
Increase in grid ratio
Increase in beam restriction
Which matrix size will have the smallest pixels if the field of view remains the same?
✔️✔️1024x1024
, What is the size of the pixel when a 512 matrix is utilized with a 200mm field of view?
✔️✔️.40mm
Pixel size = FOV/ matrix size
Which collection element is utilized with both direct and indirect digital radiography?
✔️✔️Thin-film transistor
Which factors affect contrast to noise ratio in digital radiography? ✔️✔️Grid ratio
Scatter radiation
Quantum mottle
Beam restriction
Which factors increase spatial resolution in computed radiography? ✔️✔️Increase in sampling
frequency
Decrease in phosphor layer thickness
Which term refers to the organized arrangement of a digital image into columns and rows for
display on a cathode ray tube? ✔️✔️Image matrix
What determines the contrast resolution of a digital imaging system? ✔️✔️bit depth
What term is defined as the distance from the center of one pixel to the center of an adjacent
pixel ✔️✔️pixel pitch
What factor is improved by a lead backing in a computed radiography (CR) phosphor plate?
✔️✔️Contrast resolution
Answers 100% Solved
What change will take place as quantum noise decreases? ✔️✔️DQE increases
Which pixel dimensions would create the sharpest image? ✔️✔️4096x4096
Which effects are seen with a high signal-to-noise ratio? ✔️✔️Decreased noise
Increased patient dose
Which is the result of high detective quantum efficiency? ✔️✔️Decreased patient dose
Which factors affect spatial resolution of a computed radiography image? ✔️✔️Laser beam
angle
Sampling frequency
Laser beam diameter phosphor layer thickness
Phosphor layer thickness
Reader translation speed
If the radiologic technologist is looking to adjust/improve the contrast to noise resolution (CNR)
in an image, what adjustment should be made? ✔️✔️Decrease in kVp
Which will result in an increase in contrast to noise resolution (CNR)? ✔️✔️Decrease in kVp
Increase in grid ratio
Increase in beam restriction
Which matrix size will have the smallest pixels if the field of view remains the same?
✔️✔️1024x1024
, What is the size of the pixel when a 512 matrix is utilized with a 200mm field of view?
✔️✔️.40mm
Pixel size = FOV/ matrix size
Which collection element is utilized with both direct and indirect digital radiography?
✔️✔️Thin-film transistor
Which factors affect contrast to noise ratio in digital radiography? ✔️✔️Grid ratio
Scatter radiation
Quantum mottle
Beam restriction
Which factors increase spatial resolution in computed radiography? ✔️✔️Increase in sampling
frequency
Decrease in phosphor layer thickness
Which term refers to the organized arrangement of a digital image into columns and rows for
display on a cathode ray tube? ✔️✔️Image matrix
What determines the contrast resolution of a digital imaging system? ✔️✔️bit depth
What term is defined as the distance from the center of one pixel to the center of an adjacent
pixel ✔️✔️pixel pitch
What factor is improved by a lead backing in a computed radiography (CR) phosphor plate?
✔️✔️Contrast resolution
