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Computed Tomography Ch 1-4 Quiz correctly answered already passed
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Computed Tomography Ch 1-4 QuizIn _________ compression, there is no loss of information in the compressed image. - correct answer
✔✔Lossless or reversible
Lossy or irreversible compression involves at least 3 steps, image transformation, quantization, and
___________. - correct answer ✔✔Encoding
______ refers to using one or more software and or hardware techniques to reduce informaiton by
removing unnecessary data. - correct answer ✔✔Digital compression
Image postprocessing methods in CT are intended to: - correct answer ✔✔Enhance the diagnostic
interpretation skills of the radiologist.
______ is responsible for high speed processing of the input digital data. - correct answer ✔✔Internal
image processor
Hounsfeld's work produced a technique that revolutionized medicine and diagnostic radiology. He called
the technique: - correct answer ✔✔computerized transverse axial scanning (tomography)
The formation of CT images by a CT scanner involves: - correct answer ✔✔Data acquistion, image
reconstruction, image display, manipulation, storage, recording and communication (All of the above)
The computer uses special mathematical techniques to reconstruct the CT image in a finite number of
steps called: - correct answer ✔✔Cone beam image reconstruction algorithm
Algebraic reconstruction technique
image reconstruction algorithms
ALL OF THE ABOVE
Data acquisition refers to the systematic collection of information from the _____ to produce CT images -
correct answer ✔✔Patient
, The process of changing the CT image gray scale is referred to as: - correct answer ✔✔Windowing
Which beam is used to scan a volume of tissue rather than a single? - correct answer ✔✔Spiral or Helical
What is the most recent MSCT scanner commercially available for clinical imaging for patients? - correct
answer ✔✔64 slice
What is the beam called when all the photons have the same energy? - correct answer ✔✔Homogenous
How many generations of computers are there? - correct answer ✔✔5
An example of binary numbering is: - correct answer ✔✔01011
The goal of CT is to overcome the limitation of radiology and tomography by achieving the following: -
correct answer ✔✔Minimal superimposition
Improving image contrast
Recording of very small differences in tissue contrast
ALL OF THE ABOVE
The first whole body CT Scanner was developed by: - correct answer ✔✔Dr. Robert Ledley
How many bits make a byte? - correct answer ✔✔8
ROM stands for - correct answer ✔✔Read only memory
How many bytes in a gigabyte? - correct answer ✔✔1,000,000,000
RAID stands for - correct answer ✔✔redundant array of independent disks
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