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CT Instrumentation Final Questions and Answers 100% Solved
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CT Instrumentation Final
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CT Instrumentation FinalWhat term is defined as the degree to which an x-ray beam is reduced by an object? -
answer attenuation
Who is credited as the "Father of CT"? - answer Hounsfield
How does a HU value of +1000 appear on the CT image? - answer white
What anatomical term describes the motion of moving towards the front of the human
body? - answer anterior
What dimension does the z axis constitute? - answer thickness
What is the CT number assigned to air on a CT image scan? - answer-1000
What picture element is constructed by the x and y axes? - answer pixel
What acquired info is converted to create CT numbers and the HU scale? - answerLAC
Tomo has what meaning in Greek? - answercut
Which imaging plane divides the body into left and right sections? - answersagittal
What CT advancement eliminated the unwinding of cables making helical scanning
possible? - answerslip ring
Xenon gas detectors are able to measure incoming photons 100% of the time for a
"measurable event". True or false? - answerfalse
Which generation of CT scanners is described as a rotate-rotate for its movement of x-
ray tube and detector array? - answer3rd generation
Which generation of CT scanners FIRST introduced the fam beam? - answer2nd
generation
What is the atomic number of Tungsten? - answer74
What component of the CT system is responsible for applying the Fourier Transform
calculation? - answerarray processor
What is the degree of useable length on the CT table that determines the extent to
which the patient can be scanned? - answerscannable range
, What is the purpose of the photodiode? - answertransform light into an electric analog
signal
What is the term given to the opening in the CT gantry? - answeraperature
Which component of the DAC is responsible for the timing and operation of the table,
gantry, and generator? - answerscan controller
What unit is composed of 8 bits? - answerbyte
Which coordinates system with imaging center utilizes directional terms to indicate
centering? - answerRAS system
The display field of view: - answeris the section of raw data selected for the image
A large SFOV is advised when imaging pediatric. True or false? - answerfalse
What term describes the precise steps preformed in a specific order to solve a problem?
- answeralgorithm
What is the process of using raw data to create an image? - answerimage
reconstruction
What is the process of obtaining an estimate of a desire value from the knowledge of 2
unknown variables? - answerinterpolation
Which reconstruction filter is preferred when imaging low scale contrast areas? -
answersmooth
Which reconstruction filter minimizes the speckled appearance of noise in an image? -
answersmooth
Which filter is best for showing the edge definition of a structure? - answersharp filter
What is the center of the gray scale? - answerwindow level
What is the result when decreasing a CT image's window width? - answerincrease
contrast between tissues
What is the effect on the CT image when changing the window level? - answerimage
brightness
A narrow window width is best when noting subtle differences in tissues of the brain.
True or false? - answertrue
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