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Name and briefly describe the five general quality
characteristics of a CT image.
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Explain the clinical significance of image blurring
and reduced visibility of detail.
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Identify and briefly describe the factors associated
with the scanning phase of the CT process that affects the blurring and
image detail.
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Describe the general relationship between the pitch
value and image detail.
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Identify and describe all adjustable factors that
have an effect on voxel size.
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Explain why some of the reconstruction filter
algorithms will reduce image detail.
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Describe the general visual appearance of noise in a
CT image.
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Explain the general effect of noise on object
visibility.
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Describe the relationship of image noise to the CT
number values of the pixels.
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Define quantum noise and explain its source.
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Explain why voxel size has an effect on the noise in
a CT image.
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Explain the general relationship between image noise
in CT and radiation dose to the patient.
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Describe the procedure that can be used to measure
the noise in CT imaging.
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Explain why water or a water equivalent material is
scanned in the process of measuring CT image noise.
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Explain why the selection of some reconstruction
filter algorithms will increase the noise in CT images.
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Describe why the Computed Tomography Dose Index (CTDI)
is used to express dose values in CT.
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Explain why the Dose Length Product (DLP) is a useful
quantity for expressing the radiation delivered to a patient's body.
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Describe the general concept of
image quality optimization and radiation
dose management in CT imaging.
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Describe how changing factors to improve image detail
(like reducing slice thickness) can result in increased radiation dose
to patients.
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Recognize, describe, and identify the sources of
common artifacts that can occur in CT imaging.
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