A-LevelPhysicsMedical physics9702/42 · May/June 2021 · Q116 Marks
State the purpose of computed tomography (CT scanning).
- (a)State the purpose of computed tomography (CT scanning).[1]
- (b)Outline the principles of CT scanning.[5]
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] to produce a 3-dimensional image of structure/body
- [1] X-rays (are used)
- [1] scanning in sections
- [1] scanning from many angles
- [1] image of each section is 2-dimensional
- [1] scanning repeated for many sections OR images of many sections combined together
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