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Phantom difference of temperature upon irradiation with a NIR laser for 3 min. The Au concentration in all 4 Ratios was the same as for the in vitro studies. The results represent the mean value ± SD, n = 4. Statistical significance represents: § p < 0.05 compared with the phantoms of only agar; * p < 0.05 comparing with the phantoms of only agar irradiated with the NIR laser; #### p < 0.0001 comparing with all the other phantoms.
