Contrast Test
1) Window _______ is the digital process for manipulating contrast.
2) T or F: High contrast relates to having many different shades of grey on a film.
3) One determining factor of high contrast is a result of ________ KvP.
4) T or F: Looking at a D log E curve, a steeper slope means there is a long scale contrast.
5) _________ is the controlling factor for contrast.
6) Film processing can effect contrast, if you have increased time, temperature, or chemical concentration you will have increased fog and _________ contrast.
7) The thickness of the body part being x-rayed also influences the contrast of an image. When thickness increases scatter increases and contrast ________.
8) To get a visible change in contrast you must change your KvP by ________%.
9) What is the difference between a screen film D Log E Curve and a digital?
10) What is the purpose of contrast on a radiographic film?
Answers
1) Width
2) False, Low contrast
3) Low
4) False, Short Scale
5) KvP
6) Decreased
7) Decreases
8) 4-12%
9) A curve on a screen film has the 5 stages of the curve, a digital curve is just a straight line
10) To see different structures within the radiograph
