Crt Fluoroscopic Exam

Front 1

1. The major reason that image intensified fluoroscopy is employed is that it allows for:

Back 1

dynamic viewing

Front 2

2. Portable intensified fluoroscopy used for diagnostic purposes must not exceed

Back 2

5r/min

Front 3

3. The time over which the human eye can store a visual image is termed:

Back 3

integration time

Front 4

4. The normal view distance for binocular vision is:

Back 4

12-15 in

Front 5

5. Most modern image intensifiers use an input fluorescent screen layer that is composed of:

Back 5

cesium iodide

Front 6

6. The conversion of light energy into a proportional amount of electrons is accomplished by a/an:

Back 6

photocathode

Front 7

7. The output screen of an image intensifier functions to convert:

Back 7

electrons into light

Front 8

8. The squared ratio of input screen to output screen is called:

Back 8

minification ratio

Front 9

9. Distortion, which occurs with an image intensifier tube that demonstrates a dimmer density image at the periphery, is called:

Back 9

vignetting

Front 10

10. The random pattern of scattered radiation, which often results in an image intensifier tube has the appearance of “snow” or “crawling ants” is:

Back 10

quantum noise