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CH6 Quiz with 100% correct answers
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CH6 Quiz with 100% correct answers
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CH6 QuizA device that acts like a camera in an indirect conversion detector is known as a
-thin-field transistor
-CCD
-field-effect transistor
-CMOS - correct answer ✔✔CCD
CCDs use more power than CMOS.
True
False - correct answer ✔✔True
When compared with a CMOS, CCDs
-are more susceptible to noise.
-are inexpensive to manufacture.
-are less light sensitive.
-use more than 100 times the power. - correct answer ✔✔use more than 100 times the power.
A detector in which each pixel has its own amplifier is known as a
CMOS
CCD
field-effect transistor
thin-field transistor - correct answer ✔✔CMOS
, The components that focus the signal from the scintillators to the CCD are called
-capacitors.
-detector elements.
-fiber optics.
-analog-digital converters. - correct answer ✔✔fiber optics
Which of the following statements about scintillators is true?
-Unstructured phosphors are more efficient.
-The amount of x-rays absorbed depends on the type of scintillator.
-Structured phosphors produce more light spread.
-All scintillators absorb the same amount of x-ray photons. - correct answer ✔✔The amount of x-rays
absorbed depends on the type of scintillator.
Quantum efficiency is a measurement of the
-amount of electron-hole pairs held by the electrostatic force.
-percentage of light that is absorbed.
-amount of electrons produced relative to the incident light from the scintillator.
-total amount of light that is absorbed. - correct answer ✔✔amount of electrons produced relative to
the incident light from the scintillator.
The most common types of noise (associated with CCD technology) that affects image quality include all
of the following except:
quantum noise.
statistical noise.
"dark" current noise.
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