INTERVIEW QUESTIONS - [1] - RT

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.





Comments