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In vitro 125I seed irradiation model. (A) 125I seed irradiation model for cell experiments. The Petri dish was placed 6 mm above the irradiation unit and a 3-mm lead cover was constructed around the model for irradiation protection. (B) 125I seed irradiation unit. The unit consisted of a 35-mm diameter polystyrene panel with eight recesses equidistantly spaced at the circumference with one seed in the center.
