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Week 10 lecture radio graphic quality
Terms in this set (105)
In radiographic technique, what are the 4 exposure factors we worry about?
-exposure time (s)
T or F: technologist need a starting point to set technique
What is the law for every machine in PA?
Every machine needs to have a technique chart, tailored for that machine
What does the technique chart provide?
kVp and suggested mAs
What are the technique charts based off of?
The average (or sthenic) patient
What are the 4 main types of technique charts?
What is a variable kVp/fixed mAs chart?
The kVp will vary based on the size of anatomy, the mAs remains the same (or fixed)
What is a variable mAs fixed kVp chart
kVp will remain the same while the mAs is variable based of anatomy
The technique chart serves as a guide for?
The technologist choosing the technique
T or F: Every technique chart is different in each room
Which technique chart is most frequently used?
Formula for variable kVp
Beginning kVp = 2x thickness of body part in cm + 23 kVp (for high frequency generator) or + 30 kVp (for single phase generator)
What is the high kVp chart used for?
Chart used for kVp higher than 100
-used for chest when desiring a long scale contrast (low contrast)
- used for fluoroscopy to adequately penetrate barium
What does AEC stand for?
Automatic exposure charts
What is considered probably the most common of all charts?
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