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Computed Tomography Ch 1-4 Quiz and answers respectively.
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Computed Tomography Ch 1-4 Quiz andanswers respectively.
In _________ compression, there is no loss of information in the compressed image. ANS - Lossless or
reversible
Lossy or irreversible compression involves at least 3 steps, image transformation, quantization, and
___________. ANS - Encoding
______ refers to using one or more software and or hardware techniques to reduce informaiton by
removing unnecessary data. ANS - Digital compression
Image postprocessing methods in CT are intended to: ANS - Enhance the diagnostic interpretation skills
of the radiologist.
______ is responsible for high speed processing of the input digital data. ANS - Internal image processor
Hounsfeld's work produced a technique that revolutionized medicine and diagnostic radiology. He called
the technique: ANS - computerized transverse axial scanning (tomography)
The formation of CT images by a CT scanner involves: ANS - 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: ANS - 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
ANS - Patient
The process of changing the CT image gray scale is referred to as: ANS - Windowing
Which beam is used to scan a volume of tissue rather than a single? ANS - Spiral or Helical
What is the most recent MSCT scanner commercially available for clinical imaging for patients? ANS - 64
slice
What is the beam called when all the photons have the same energy? ANS - Homogenous
How many generations of computers are there? ANS - 5
An example of binary numbering is: ANS - 01011
The goal of CT is to overcome the limitation of radiology and tomography by achieving the following:
ANS - 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: ANS - Dr. Robert Ledley
How many bits make a byte? ANS - 8
ROM stands for ANS - Read only memory
How many bytes in a gigabyte? ANS - 1,000,000,000
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