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Exposure Factors

Chapter 28 - Defining Spatial Resolution

QuestionAnswer
To what range is the majority of human visual acuity limited to? a. 4 lp/mm b. 7 lp/mm c. 2 lp/mm d. 5 lp/mm d. 5 lp/mml
The degree of geometric sharpness spatial resolution
lp/mm line pairs per mm
Resolution has an effect on the image appearance by displaying ______ ______ structures. fine detail
What represents a high-frequency signal that is capable of imaging smaller objects? high spatial frequency
Measures the accuracy of an image compared to the original object on a scale of 0 to 1? modulation transfer function (MTF)
Which of the following distances has to be minimized to improve spatial resolution? a. SID b. SOD c. OID d. FFD c. OID
What occurs to resolution as the fill factor decreases? a. resolution decreases b. resolution is eliminated c. resolution remains the same d. resolution increases a. resolution decreases
A well-defined or sharp area of a shadow Umbra
Expression of the boundaries of an image edge spread function (ESF)
Background information that the imaging receptor receives imaging noise
The sampling of the spatial resolution frequency signal twice from each cycle in digital systems Nyquist criterion
Expression of the boundaries of an image; determined by a mathematical measurement of an image produced at a single point. point spread function (PSF)
Lack of sharp definition of fine detail unsharpness
One of the geometric properties of image quality, the degree of geometric sharpness or accuracy of structural lines actually recorded in the image; also referred to as detail, definition, sharpness, spatial resolution recorded detail
Occurs when spatial frequency exceeds the Nyquist frequency and the incoming data are sampled less than twice per cycle aliasing
Exposure Factors Chapter 28 - Spatial Resolution
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