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• radiochromic/radiographic film
• semiconductors (diodes)
• TLD (thermo-luminescent dosimetry)
• micro chambers
• synthetic diamond
• organic scintillators
• OSL (optically stimulated luminescence)
• extrapolation chambers (build-up region)
• gel dosimetry (3D - MRI or optical)
• alanine
• MOSFET
•1D or 2D detector arrays (diodes, ionization chambers)
• EPID
• …..
but, there are many useful alternatives.