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COMPUTED TOMOGRAPHY FOR TECHNOLOGISTS EXAM REVIEW (RED BOOK) QUESTIONS WITH CORRECT ANSWERS

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COMPUTED TOMOGRAPHY FOR TECHNOLOGISTS EXAM REVIEW (RED BOOK) QUESTIONS WITH CORRECT ANSWERS

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The configuration of X-ray tube to the detectors determines


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Scanner generation




In step and shoot/axial scanning there is a slight pause in scanning between data
acquisitions as the table moves to the next location, this is referred to as


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Interscan delay

,Refers to the number of photons absorbed by the detector and is dependent on the
physical properties of the detector face


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Absorption efficiency




The process of converting the data from the attenuation profile to a matrix


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Back projection




All other contrast reactions that aren't chemotoxic and that are largely unpredictable
and most often occur within an hour of contrast media and are not related to dose.
Side affects are nausea, vomiting, and altered taste etc.


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Idiosyncratic reactions




Valve on the left side of the heart between the left atrium and the left ventricle


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, Mitral valve




When raw data is used to generate a new image


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Retrospective reconstruction




The practice of grouping more than one axial scan in a single breath hold In step and
shoot scanning is


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Clustering




When renal function is abnormal, but capable of sustaining essential bodily function


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Renal insufficiency




Image reconstruction that is automatically produced during scanning


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, Prospective reconstruction




Contrast agent that has much lower osmolality and produces fewer adverse reactions


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Low osmolality contrast media (LOCM)




_________________ is expressed as Rem, Roentgen, or Roentgen equivalent man


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Dose equivalent




Referencing the table can also be referred to as


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Zeroing




Because an object may not lie entirely within a pixel, the pixel dimension should be
half the size of the object to increase the likelihood of that object being resolved


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