INTERVIEW QUESTIONS
Radiography Testing
1. What is "sensitivity"?
Ans: Sensitivity in a radiograph is a function of 'contrast' and
'definition'.
2. What is "Contrast"?
Ans: Contrast is the comparison between film densities for
different areas.
3. What is "Definition"?
Ans: Definition is the demarcation between areas of different
densities.
4. What is "Penubra"?
Ans: The fuzzy edges of the image are called Penubra. This is
related to geometrical unsharpness.
5. What is the relation between radiography film grain size and exposure time?
Ans: Large grain size needs less exposure time compared to small
grain size films.
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