Table 2.

Qualities of dosimeters suitable for IVD.

Dosimeter	Thermoluminescent Dosimeters (TLDs)	Semiconductor Diodes	Metal oxide semiconductor field effect transistor (MOSET)	Radioluminescence (RL)	Plastic Scintillator Detector (PSD)	Optically Stimulated Luminescent Detectors (OSL)
Advantages	− Small − High Sensitivity − No angular dependence − Dynamic range − Low cost − Well studied system	− Variable size − High sensitivity − Dynamic range − Simple calibration − Reasonable cost − Online dosimetry	− Very small size − High sensitivity − Dynamic range −Low cost − Online dosimetry	− Very small size − Very sensitive − No angular dependent − No energy dependence − Dynamic range − Online dosimetry	− Very small size − No angular dependence − No energy dependence − Online dosimetry − Simple calibration	− Stable − No directional effects − Dose rate independent
Disadvantages	− No on-line dosimetry − Energy dependent − Requires calibration and preparation for read-out	− Energy dependent − Angular dependence	− Energy dependent − Angular dependence (due to epoxy resin bulb) − Limited lifespan (20,000 mV)	− Frequent recalibration − Stem effect − Not commercially available	− Stem/Cherenkov effect*	− Stem/Cherenkov effect* − Need a laser reading

^*Stem effect = unwanted light generated in the fibre cable upon irradiation.