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RAD107 exam 2

QuestionAnswer
Spatial resolution improves with decreased...? focal spot size, motion and pixel size.
Which of the following is the principal contributor to image noise in radiographic and fluoroscopic imaging procedures? -Better resolution -Quantum Mottle -Higher contrast -Improved detail Quantum Mottle
What is the formula for the magnification factor? MF = SID/SOD
Which of the following will reduce quantum mottle? -High mAs -Low kVp -Slower image receptors -High mAs, low kVp, and slower image receptors High mAs, low kVp, and slower image receptors
T/F: Distortion depends on tube position. False
Patient thickness affects image quality by affecting...? magnification, radiographic contrast and focal spot blur
How can you improve image contrast with a heavy patient without increasing patient dose? Use tight collimation
Which kVp selection would result in the most scattered x-rays in the image-forming beam? -90 kVp -75 kVp -60 kVp -50 kVp 90 kVp
Contrast resolution is improved by...? tight collimation, lowering kVp and patient compression
Decreasing the kVp will increase...? Patient dose
The x-ray interaction that contributes to the clear parts of the image is...? Photoelectric Interaction
Compton scatter contributes to...? Image noise
Lossless compression reduces data files to as low as...? 10:1
What is the basic photometric unit? Lumen
What is the file size of an image with a 1026 × 1026 matrix and a 2.5 byte grayscale depth? 2.6 MB
Created by: evanlbates
 

 



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