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Summary of point dose detectors
Dosimeter Advantages
Disadvantages
Diode
High intrinsic precision
High sensitivity
Real time dose information
Simple read-out
Energy dependant
Temperature dependant
Corrections for SSD, Field
size, Wedge etc
(micro)
MOSFET
Small sensitive volume
Small physical size
Real time dose information
Neglectible beam perturbations
Energy independent
Limited life-time
Limited intrinsic precision
TLD
Small volume
Cheap
Long life-time
Neglectible beam perturbations
No real time dose information
Limited intrinsic precision
Signal erased during read-out
Easy to lose
Accurate result require care
Adapted from thesis of E.Bloemen- van Gurp: “In vivo dosimetry using MOSFET detectors
in radiotherapy