RAD-101 ch.7 questions with verified
solutions graded A+
Attenuation - correct answer ✔✔process by which a beam of radiation is reduced in energy when
passing through tissue or other materials
automatic rescaling - correct answer ✔✔process by which images are produced with uniform brightness
and contrast, regardless of the amount of exposure
Brightness - correct answer ✔✔Function of a display monitor; changes image lightness/darkness
computed tomography (CT) - correct answer ✔✔Digital image acquisition modality that uses storage
phosphor plates to produce images
Contrast - correct answer ✔✔Contrast is the difference between the ranges of adjacent IR exposures
represented as gray tones
contrast resolution - correct answer ✔✔the ability to distinguish between very subtle differences in
image receptor exposures and differentiate them from the noise in the image
Data drop - correct answer ✔✔Condition due to extreme overexposure which causes digital detector
elements to become overwhelmed with photon energy and leads to drop of data during image
reconstruction
Detector Element (DEL) - correct answer ✔✔Pixel size element of the digital radiography image receptor
that has a fixed dimension in x- and y- orientation
Displayed image contrast - correct answer ✔✔relative brightness difference between the adjacent pixels
in a digital image as viewed on a monitor
solutions graded A+
Attenuation - correct answer ✔✔process by which a beam of radiation is reduced in energy when
passing through tissue or other materials
automatic rescaling - correct answer ✔✔process by which images are produced with uniform brightness
and contrast, regardless of the amount of exposure
Brightness - correct answer ✔✔Function of a display monitor; changes image lightness/darkness
computed tomography (CT) - correct answer ✔✔Digital image acquisition modality that uses storage
phosphor plates to produce images
Contrast - correct answer ✔✔Contrast is the difference between the ranges of adjacent IR exposures
represented as gray tones
contrast resolution - correct answer ✔✔the ability to distinguish between very subtle differences in
image receptor exposures and differentiate them from the noise in the image
Data drop - correct answer ✔✔Condition due to extreme overexposure which causes digital detector
elements to become overwhelmed with photon energy and leads to drop of data during image
reconstruction
Detector Element (DEL) - correct answer ✔✔Pixel size element of the digital radiography image receptor
that has a fixed dimension in x- and y- orientation
Displayed image contrast - correct answer ✔✔relative brightness difference between the adjacent pixels
in a digital image as viewed on a monitor
