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Chapter 6 CCD/CMOS Image Capture well answered already passed
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Chapter 6 CCD/CMOS Image Capture well answered already passed
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Chapter 6 CCD/CMOS Image CaptureCCDs (charge-coupled devices) - correct answer ✔✔The oldest indirect-conversion digital radiography
systems used ________ to acquire the digital image
Fiber optics - correct answer ✔✔In a CCD system, x-ray photons interact with a scintillation material and
the signal is transmitted by lenses or __________ to the CCD
Chip - correct answer ✔✔A photosensitive receptor and electronics embedded into a substrate material
in a silicon _______ make up a CCD
Scintillator - correct answer ✔✔Incident light from a ___________ strikes the detector and
electron/hole pairs are produced in the silicon
Light - correct answer ✔✔The number of electron/hole pairs is related to the amount of ________ that
is absorbed
Electrostatic - correct answer ✔✔The electrons are held by ____________ forces in the array until the
charge is read out to form the image
Dioxide - correct answer ✔✔The chip is made up of a polysilicon layer, a silicon _________ layer, and a
silicon substrate.
Polysilicon - correct answer ✔✔The __________ layer is coated with a photosensitive material and
contains the electronic gates
Silicon dioxide - correct answer ✔✔The _____________ layer is an insulator
Silicon substrate - correct answer ✔✔The _____________ contains the charge storage area
, 3 - correct answer ✔✔Each pixel or detector element (DEL) contains how many electrodes that hold the
electrons in a electrical potential well?
Electrons - correct answer ✔✔The DELs are formed by voltage gates that, at readout are opened and
closed like gates to allow the flow of ____________
Voltage sign; Bucket brigade scheme - correct answer ✔✔To collect the charge on the silicon chips, the
_____________ is changed on the electrodes within each DEL, moving the electrons by rows down the
columns until the readout row is reached. This process is called what?
Digitized - correct answer ✔✔Once the readout row is reached, the data are sent sequentially to the
sense amplifier and are then ____________
Overfill - correct answer ✔✔There can be issues with _________ in the DELs, which causes excess
electrons to spill out of the DEL into an adjacent DEL.
Blooming - correct answer ✔✔Building overflow drains to reduce or prevent overfill in the DELs is called
the ____________ effect
Because of the high cost - correct answer ✔✔Why is is not practical to manufacture CCD chips larger
than 5cm X 5cm?
2-4 - correct answer ✔✔Most chips range from __ to __ cm
Reduced - correct answer ✔✔The image has to be matched to the size of the CCD, which implies that
the image must be __________ in size
Lenses or fiber optics - correct answer ✔✔CCD technology uses ____________ so that the image
matches the receptor size
Scintillator
Light collection components
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