12 Questions
What contributes to the subject soft-tissue contrast in CT imaging?
Differences in physical density
Why can small differences in soft-tissue density be visualized on CT scans?
Due to the 2-dimensional nature of the image
What is responsible for amplifying differences in grey levels (grey scale) for various tissues in CT scans?
Windowing
Why is imaging low-contrast objects with CT limited?
Size and uniformity of the object
How does a higher tube current affect contrast in CT imaging?
Reduces noise in the image
What factor influences the contrast resolution between adjacent objects imaged with CT?
Difference in linear attenuation coefficient
What does CT image quality depend on?
Image contrast, Spatial resolution, Noise, Artifacts
Which factor helps determine the sensitivity of a diagnostic CT image?
Image contrast
What is contrast resolution in CT imaging defined as?
Ability to distinguish structures without regard for size or shape
Which type of contrast impacts display contrast in CT imaging?
Subject contrast
What determines CT subject contrast?
Differential attenuation
Which type of radiological events are most common in CT due to the high peak kilovoltage used?
Compton scatter events
Learn about CT image quality assessment and the factors that determine sensitivity and visibility of details in diagnostic CT images. Explore methods for characterizing and quantitating image contrast, spatial resolution, noise, and artifacts.
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