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Methods for in vivo dosimetry

In vivo dosimetry can be done in two ways:

o

A suitable detector can be inserted into the patient to measure the

dose directly but

invasively

o

A detector can be placed against or at some distance from the

patient to measure the dose

non-invasively

In this case the dose inside the patient is calculated with a suitable

mathematical model, using the dose measured at the position of the

detector.

EPID dosimetry, as well as the use of dosimeters positioned on the skin of a

patient, belongs to the second category of in vivo dosimetry.

In vivo dosimetry is the measure of the dose delivered

to the

patient

during

the treatment.