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Chapter21a questions and answers certified 2024

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Chapter21a questions and answers certified 2024

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  • August 9, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CCDS
  • CCDS
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LEWISSHAWN55
Chapter 6: CCD/CMOS Image Capture
A device that acts like a camera in an indirect conversion detector is known as
a: - correct answer ✔Charged Coupled Device


The oldest indirect conversion digital radiography system used _________ to
acquire a digital image - correct answer ✔Charged Coupled Device


In a CCD system what happens? - correct answer ✔X ray photons interact
with a scintillation material, then the signal is transmitted by lenses or fiber
optics to the CCD


During the transmission process, lenses ______ the size of the projected
visible light image and transfers the image to one or more small _______ that
__________ the light into an __________ and ________. This charge is then
stored and sent to an _______ - correct answer ✔reduce, capacitors,
convert, electrical signal, store it, ADC


The amount of electron-hole pants is related to the the - correct answer
✔amount of light absorbed


The chip of the CCD is made up of what 3 layers? - correct answer
✔Polysilicon layer, silicon dioxide layer, silicon substrate


Coated in a photosensitive material and contains the electron gates in the chip
- correct answer ✔Polysilicon layer


Insulator in the chip - correct answer ✔Silicon dioxide layer

, Contains the charge storage area in the chip - correct answer ✔Silicon
substrate


Each pixel or detector element (del) contains what? - correct answer ✔3
electrodes that hold the electrons in an electrical potential well


Formed by voltage gates that are opened and closed like gates to allow the
flow of electrons - correct answer ✔Dels


Process of electron movement during image processing; voltage gates within
the detector elements are closed, allowing electrons to flow by rows and down
by columns to readout row. - correct answer ✔Bucket brigade scheme


The readout process requires that _______ and _______. - correct answer
✔the flow of electrons is timed; multiple voltage changes occur


Because of the high cost of a CCD chip, it is not practical to manufacture a
CCD chip larger than - correct answer ✔5 cm X 5 cm


Most CCD chips range from - correct answer ✔2-4 cm


Image must be _____ in size to match the size of the CCD - correct answer
✔Reduced


CCD uses ______ or ______ so that the image matches the receptor size -
correct answer ✔Lenses, fiber optics

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