A-LevelPhysicsMedical physics9702/42 · Feb/Mar 2019 · Q95 Marks
Outline the principles of computed tomography (CT) scanning.
- Outline the principles of computed tomography (CT) scanning.[5]
Mark scheme
Marking points from the official mark scheme (Feb/Mar 2019). The mark or mark type is shown in brackets.
- [B1] X-rays (are used)
- [B1] (object is) scanned in sections / slices
- [B1] either: scans taken at many angles / directions or images of each section / slice are 2-dimensional
- [B1] scans of many sections / slices are combined
- [B1] (to give) 3-dimensional image (of whole structure)
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