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adv img digital 2
advanced imaging digital 2 of 3
Question | Answer |
---|---|
In digital, what does kVp control? | penetration (NOT contrast) |
In digital, what controls contrast? | window width |
In digital, what controls density? | window level |
An increase in window level will change density how? | density will increase with increased window level |
What type of relationship do window width and contrast have? | inverse |
Frequency (digital) | raw data used to create the image |
A high contrast image has what kind of frequency? | high |
A low frequency image will have what kind of contrast? | low |
Narrow window width produces what type of image? | high contrast, short scale |
Wide window width produces what kind of image? | low contrast, long scale |
12 bit depth produces how many shades of gray? | 4096 |
12 bit depth produces how many gray levels? | 212 |
In the image file size formula, the X, Y and B each represent what? | X = x-axis pixel matrix size, Y = y-axis pixel matrix size, B = gray scale bit depth |
What is the image file size formula? | XY(B/8) |