Chapter 21 Digital imaging Exposure Techniques
Questions and Answers| Latest Update
Windowing is an example of this function that allows manipulation of an image's brightness or
contrast after exposure ✔️✔️post processing
Device that should be used in conjunction with an IR is the part thickness if more than 10 cm
✔️✔️grid
Performing this action will prevent the appearance of fog on a CR image ✔️✔️erasure
Occurs when there is severe overexposure to the image receptor ✔️✔️saturation
This describes the appearance of the anatomy when kVp is too low and remnant radiation is
unable to get through the part ✔️✔️underpenetration
A method of technique factor selection that allows the technologist to use the same technique
on different procedures due to their similar thicknesses and tissue composition
✔️✔️comparative anatomy
The minimum percentage of the IR that must be exposed to ensure adequate exposure and an
acceptable EI value ✔️✔️30
A form of image noise that occurs when there is an inadequate number of photons exposing
the IR; "quantum _" ✔️✔️mottle
The undesirable practice of using more technique than is necessary to expose a radiograph
✔️✔️dose creep
, The graph generated by the computer that represents the range of pixel intensities in an image
✔️✔️histogram
The quality of CR/DR systems that allows visualization of anatomy even if the technique factor
settings are more than 100% too high: "Exposure _" ✔️✔️latitude
when considering field centering and collimation variables, which was most likely to result in
analysis error? ✔️✔️having one side of the collimated field off the edge of the plate
when should grids be used with CR? ✔️✔️grids are used for the same procedures as film
screen imaging
__ is displayed in the image when there has not been sufficient exposure to the CR plate
✔️✔️quantum mottle
which of the following assists the computer in avoiding the field recognition errors when
multiple fields are exposed on a CR plate? ✔️✔️center the anatomy within each field,
have the fields parallel to each other,
the fields must be equidistant from each other
what adjustment is recommended for all procedures to allow for CR system to operate at 400
speed class with reduction in pt dose? ✔️✔️increase all kvp levels by 15%
which statement is true in regard to CR systems? ✔️✔️process can typically compensate for
scatter caused during the exposure
Questions and Answers| Latest Update
Windowing is an example of this function that allows manipulation of an image's brightness or
contrast after exposure ✔️✔️post processing
Device that should be used in conjunction with an IR is the part thickness if more than 10 cm
✔️✔️grid
Performing this action will prevent the appearance of fog on a CR image ✔️✔️erasure
Occurs when there is severe overexposure to the image receptor ✔️✔️saturation
This describes the appearance of the anatomy when kVp is too low and remnant radiation is
unable to get through the part ✔️✔️underpenetration
A method of technique factor selection that allows the technologist to use the same technique
on different procedures due to their similar thicknesses and tissue composition
✔️✔️comparative anatomy
The minimum percentage of the IR that must be exposed to ensure adequate exposure and an
acceptable EI value ✔️✔️30
A form of image noise that occurs when there is an inadequate number of photons exposing
the IR; "quantum _" ✔️✔️mottle
The undesirable practice of using more technique than is necessary to expose a radiograph
✔️✔️dose creep
, The graph generated by the computer that represents the range of pixel intensities in an image
✔️✔️histogram
The quality of CR/DR systems that allows visualization of anatomy even if the technique factor
settings are more than 100% too high: "Exposure _" ✔️✔️latitude
when considering field centering and collimation variables, which was most likely to result in
analysis error? ✔️✔️having one side of the collimated field off the edge of the plate
when should grids be used with CR? ✔️✔️grids are used for the same procedures as film
screen imaging
__ is displayed in the image when there has not been sufficient exposure to the CR plate
✔️✔️quantum mottle
which of the following assists the computer in avoiding the field recognition errors when
multiple fields are exposed on a CR plate? ✔️✔️center the anatomy within each field,
have the fields parallel to each other,
the fields must be equidistant from each other
what adjustment is recommended for all procedures to allow for CR system to operate at 400
speed class with reduction in pt dose? ✔️✔️increase all kvp levels by 15%
which statement is true in regard to CR systems? ✔️✔️process can typically compensate for
scatter caused during the exposure
