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Quality assurance in radiotherapy 

Quality assurance in radiotherapy
Quality assurance in radiotherapy

T Jordan

and E Aird

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date: 20 October 2019

The only real mistake is the one from which we learn nothing.

John Powell, composer

A radical radiotherapy dose of 70Gy is over 3,500 times the 20mSv annual limit of exposure for a worker, and around 10 to 15 times the whole body fatal dose that might be received, from a nuclear accident or weapon detonation. The twin factors of fractionation and restriction of exposure by collimation and targeting in radiotherapy permit effective use of this lethal potential, and as accuracy in delivery also increases are now allowing study of the effectiveness of even higher ‘dose escalation’ regimes. Nevertheless the potential for damage to the patient is high and as techniques have become more complex the scope for a procedural or systematic error have increased. As the delivery has become less transparent to the user, control has increasingly come to rely on computer management and a procedural system of control and checking....

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