LRA 221 Week 3 Exam Combined
Tested Questions With Revised
Correct Detailed Answers
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1. A detector in which each pixel has its own amplifier is known
as a
A. CCD
B. field-effect transistor
C. CMOS
D. thin-field transisto...
1. A detector in which each pixel has its own amplifier is known
as a
A. CCD
B. field-effect transistor
C. CMOS
D. thin-field transistor - ANSWER C. CMOS
2. A highly efficient indirect conversion system that takes up
less fill space than CCDs is known as a(n)
A. analog to digital converter
B. field-effect transistor
C. CMOS
D. thin-field transistor - ANSWER C. CMOS
,3. The indirect conversion detector system that requires
optical coupling and image size reduction is known as a
A. CCD
B. field-effect transistor
C. CMOS
D. thin-field transistor - ANSWER A. CCD
4. When specialized pixels in a complementary metal oxide
silicon system are struck with x-ray photons
A. the x-ray photons are converted into light
B. light photons are stored in capacitors
C. light photons are converted into electrical charges
D. All of the above - ANSWER D. All of the above
5. Quantum efficiency is a measurement of the
A. amount of electron-hole pairs held by the electrostatic force
B. percentage of light that is absorbed
C. amount of electrons produced relative to the incident light
from the scintillator
, D. total amount of light that is absorbed - ANSWER D. total
amount of light that is absorbed
6. Some advantages to CCDs include
A. less expensive to manufacture
B. module design makes repairs and upgrades easy
C. demagnification capabilities
D. a and c only
E. All of the above - ANSWER D. a and c only
7. The number of electron-hole pairs produced is related to the
amount of light absorbed
A. True
B. False - ANSWER A. True
8. The polysilicon layer within a CCD acts as an insulator
A. True
B. False - ANSWER B. False
9. CCDs use more power than CMOS
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