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RAD 370 Digital Imaging Final Exam 2024 with Questions and Answers| Latest Update
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RAD 370 Digital Imaging Final Exam 2024 with Questions and Answers| Latest Update
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RAD 370 Digital Imaging Final Exam 2024 withQuestions and Answers| Latest Update
A device that acts like a switch to send Electrical charges to the image processor in a direct
conversion flat panel detector is known as a ________ transistor:
- thin-field
- field-effect
- thin-film
- field-energy - ✔✔field-effect
Which of the following is used as a photo conductor:
- Gd2O2S
- a-Se
- a-Si:H
- cesium iodide (CsI) - ✔✔a-Se
Which of the following is not considered a scintillator?
- Gd2o2S
- CsI
- a-Se
- none of the above - ✔✔a-Se
Flat-panel detectors that use indirect conversion technology convert:
- electrical signals to light
- light to x-rays
- x-rays to electrical signals
- x-rays to visible light - ✔✔x-rays to visible light
,Indirect conversion in flat-panel detectors is a ______-step process:
- one
- two
- three
- four - ✔✔two
The type of flat-panel detector that uses films of silicon integrated with arrays of photodiodes is
known as a(n):
- CsI detector
- charge-coupled device
- CMOS
- amorphous silicon detector - ✔✔amorphous silicon detector
CsI detectors use:
- rare-earth scintillators
- thin crystalline needles
- miniature cameras
- specialized pixel sensors - ✔✔thin crystalline needles
In CsI detectors:
- there is very little light spread
- crystalline needles block light from the detector
- x-rays are converted into an electrical signal
- light spread causes resolution to decrease - ✔✔there is very little light spread
Possible causes of image lag include all except:
, - rapid succession images
- overexposure
- lack of beam attenuation
- underexposure - ✔✔under exposure
Which of the following can be done to decrease the chance of having lag occur in the next
image?
- decrease the amount of time between exposures
- increase the amount of time between exposures
- leave collimation open
- acquire the image requiring the highest technical factors first - ✔✔increase the amount of
time between exposures
Multiple numeric values divided into an array of small elements capable of being processed is
the definition of ______ images:
- analog
- digital
- medical
- radiographic - ✔✔digital
Which of the following statements is not true:
- matrix size can change without affecting the FOV
- FOV can change without affecting the matrix
- changing the matrix or the FOV will change the size of the pixel
- changing the matrix, and the FOV will not change the size of the pixel - ✔✔changing the
matrix and the FOV will not change the size of the pixel
Each square in a matrix is called a:
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