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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.