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Erstellt von Alex Ertmer
vor fast 7 Jahre
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Frage | Antworten |
Difference between adjacent densities | Contrast |
Difference between adjacent densities that comprise the contrast are great. | High Contrast |
Fewer shades of gray are present. | High Contrast |
Three other terms for High Contrast: | 1)Short Scale 2)Increase in Contrast 3)Greatest Contrast |
Differences between adjacent densities are minimal. | Low Contrast |
Different names for Low Contrast | 1)Long Scale 2)Decrease Contrast) 3)Least Contrast |
An abdomen x-ray is an example of ____ ____. | Low Contrast |
High contrast uses ____ kVp. | Lower kVp |
Low contrast uses ____ kVp. | Higher kVp |
The number of useful visible densities or shades of gray on a radiograph. | Scale of Contrast |
Total amount of contrast is determined by which two things? | 1)Subject Contrast 2)Radiographic (film) Contrast |
The range of differences in the intensity of the x-ray beam after it's been attenuated by the patient. | Subject Contrast |
The absorption characteristics of the anatomic tissue imaged & the quality of the x-ray beam. | Subject Contrast |
Subject Contrast is determined by: | Patient Factors -Thickness of tissue -Type of Tissue -kVp |
_____ is the primary controller in subject contrast. | kVp |
Increasing kVp increases fog levels (_____). | Scatter |
_____ _____ is a simple tool to help focus on the contrast in a selected area. | Contrast Mask |
This helps to eliminate adjacent information making evaluation easier. | Contrast Mask |
Contrast mask should not replace _____. | Collimation |
_____ is a post exposure tool. | Contrast Masking |
A visible change in contrast will not be visible until kVp is change by ____ - ____%, depending on range. | 4%-12% |
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