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3 3 In air measurement technique

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3.4 Calibration using well type chambers

3.5 Calibration using solid phantoms

Measurements in solid phantoms are not suitable for low energy sources

3.6 Relative measurements

Readings of consecutive source deliveries can be compared and deviations larger than

3% or 5% should be investigated Serious incidents may be identified before treatment

ESTRO Booklet N

8 (2004)