Chapter 24 Viewing the Medical Image-Bushong Test Bank

Chapter 24 Viewing the Medical Image Bushong: Radiologic Science for Technologists




MULTIPLE CHOICE


1. The science of is the study of the response of the human eye to light.
a. physiology
b. optometry
c. photometry
d. ophthalmology




ANS: C
The science of photometry is the study of the response of the human eye to light.


2. What is the basic photometric unit?
a. Lumen
b. Candela
c. Lux
d. Nit




ANS: A
The basic photometric unit is the lumen.


3. The cosine law is used to describe .
a. luminous intensity of a digital display device
b. the strength of ambient light
c. the fall off of luminous intensity

, d. the emitted light from a cathode ray tube




ANS: A
The cosine law is used to describe luminous intensity of a digital display device.


4. The decreasing luminous intensity with increasing distance from the source of light
follows
.
a. the law of gravity
b. Murphy’s law
c. cosine law
d. the inverse square law
ANS: D
The decreasing luminous intensity with increasing distance from the source of light
follows the inverse square law.
5. A digital display monitor is best viewed .
a. straight on
b. from above
c. from below
d. at a 30° angle




ANS: A
A digital display monitor is best viewed straight on.


6. A liquid crystal is a material in a state. a. solid
b. state between a liquid and a solid
c. liquid
d. state between a liquid and a gaseous

, ANS: B
A liquid crystal is a material in a state between a liquid and a solid state.


7. Almost all digital images in medical imaging are viewed and interpreted on a
.
a. view box
b. CRT device
c. digital display device
d. television monitor
ANS: C
Almost all digital images in medical imaging are viewed and interpreted on a digital
display device.
8. Almost all medical flat panel digital display devices are .
a. color liquid crystal displays
b. monochrome liquid crystal displays (LCDs)
c. color CRTs
d. monochrome CRTs




ANS: B
Medical flat panel display devices are monochrome liquid crystal displays.


9. Medical flat panel display devices are identified by the . a.
aperture ratio
b. depth of the monitor
c. size of the pixels
d. number of pixels