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Commissioning procedure of electronic portal imaging device in vivo dosimetry (EPID IVD) by correlation ratios. Green rounded boxes represent suggested EPID measurements and treatment planning system (TPS) calculations. Blue boxes are output data, used for subsequent dose calculations, specific to machine, energy, dose rate, and imaging parameters. (w = phantom thickness on central axis, l = square field size, d = vertical displacement off-center; see Figure 2.)
