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Chapter 23 Principles
Homework questions and made up questions from debbies powerpoint
Terms in this set (14)
In general radiography, the ________ possible OID should always be used.
The greater the OID, the ________ subject contrast in the remnant beam image.
The greater the OID, there is ________ sharpness of detail in the image.
At greater OID, __________ radiation is allowed to spread out more, while ________ radiation remains at the same concentration. (per the textbook)
What is the formula for geometric sharpness?
SOD / (FS x OID)
Magnification is directly proportional to the ________ ratio.
Image sharpness is directly proportional to the ________ ratio.
What is the formula for geometric unsharpness?
(FS x OID) / SOD
If the SID is 40 inches and the SOD is 20 inches, the projected image of the object will be magnified by a factor of ______.
If both SID and OID are increased by 6 inches, what will be the net effect on the exposure intensity at the image receptor plate?
What are the best way to maintain sharpness when performing macroradiography (magnification technique)?
Using the smallest focal spot
How do you find SOD?
What is the air gap technique?
When there is a large OID and requires an increase in technique to improve contrast, and requires an increase in SID to minimize an increase in magnification
What is macroradiography?
"Big radiography". Done on purpose to magnify anatomy.
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