Curiosity has led to self-tutoring: the tutor discusses the two terms CT scan and CAT scan.
CT scan and CAT scan have the same meaning. CAT scan is the older term.
CT stands computerized tomography, whereas CAT stands for computerized axial tomography.
Computerized tomography conveys the idea that, once the cross-sectional scans have been taken, a computer program is used to produce an image from their data.
In the phrase computerized axial tomography, the word axial refers to the idea that the cross-sectional scans are taken by revolution around a common axis (axis=line). Specifically, a scan is taken around the patient, then another a short distance along, and so on.
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