Physics A-Level
Radiotherapy and the therapeutic ratio
What Radiotherapy and the therapeutic ratio means in Physics A-Level, as defined for AQA.
Definition of Radiotherapy and the therapeutic ratio
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Reference: AQA
Fractionation divides the total dose into many smaller treatments, allowing healthy cells time to repair sub-lethal damage between fractions while tumour cells accumulate damage.
Topics that use Radiotherapy and the therapeutic ratio
- Use of high-energy X-rays (A-level only) (AQA A-Level)
Related terms
- Dose shaping and beam geometry
- Ionising radiation and biological damage
- Patient safety and treatment planning
Using Radiotherapy and the therapeutic ratio in the exam
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