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Computed Tomography Vocabulary (rated 100% correct).
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Computed Tomography Vocabulary(rated 100% correct).
Algorithm ANS - mathematic formula designed for computers to carry out complex calculations required
for image reconstruction; designed for enhancement of soft tissue, bone, and edge resolution; also
referred to as kernel
Aperture ANS - opening of the gantry through which the patient passes during scan
Artifact ANS - distortion or error in image that is unrelated to subject being studied
Attenuation ANS - coefficient CT number assigned to measure remnant radiation intensity after
attenuation by tissue density
Axial ANS - describes plane of image as presented by CT scan; same as transverse
Computed Tomography (CT) ANS - x-ray tube and detector assembly rotating 360 degrees around a
specified area of the body
Computed Tomography Dose Index (CTDI) ANS - radiation dose descriptor calculated with normalized
beam widths for 14 contiguous sections or slices
CT Angiography ANS - use of volumetric CT scanning with spiral technique to acquire image data that
are reconstructed into three-dimensional CT angiograms
CT Number ANS - arbitrary number assigned by computer to indicate relative density of a given tissue;
varies proportionately with tissue density
Data Acquisition System (DAS) ANS - part of detector assembly that converts analog signals to digital
signals that can be used by the CT computer
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