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Cards In This Set
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Average Display Number for Blood is
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+45 HU
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The electronic combination of signals from adjacent detectors to form a CT image is called
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Binning
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The technical adjustments that may be employed to improve the temporal resolution of and MDCT system
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Decrease in section width, image segmentation, physiologic gating
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Streaking artifact that occurs in the area of the posterio fossa during a CT examination of the brain
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The Hounsfield bar
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Relative accuracy between calculated CT numbers and their respective linear attenuation coefficients is referred to as
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Linearity
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To maintain the security and patient privacy when medical images are transmissed accross a network images are coded how
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By encryption
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Which is not commonly used as CT scintillation detector material
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Silver halide
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Mathematical technique that involves the estimation of an unknown value from values on either side of it is known as
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Interpolation
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True or False. In a CT abdomen examination, a misregistration artifact is most likely to occur
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True
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In a single slice CT system, which technical parameters can be adjusted retrospectively
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Section increment and reconstruction algorythm
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Bowtie filters are employed in a CT xray system to reduce
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Patient radiation dose
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The fluctuation of CT number in an image of uniform, homogeneous material may occur because of
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Noise
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A ROI measurement placed over a portion of a CT image provides which of the following
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Average CT number (HU)
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