Physics A-Level
Dose shaping and beam geometry
What Dose shaping and beam geometry means in Physics A-Level, as defined for AQA.
Definition of Dose shaping and beam geometry
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Reference: AQA
A multi-leaf collimator shapes the X-ray beam to match the tumour outline, and several beams from different directions or a rotating beam concentrate dose where the beams overlap.
Topics that use Dose shaping and beam geometry
- Use of high-energy X-rays (A-level only) (AQA A-Level)
Related terms
- Ionising radiation and biological damage
- Patient safety and treatment planning
- Radiotherapy and the therapeutic ratio
Using Dose shaping and beam geometry in the exam
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