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(Left) An adult male phantom (model 701-D, CIRS, Norfolk, VA) was scanned with a SOMATOM Definition Flash scanner (Siemens Healthineers). (Right) The phantom was composed of 25-mm axial slices which contained cylindrical holes for thermoluminescent dosimeters (TLDs) placement. In this study, TLDs were placed in locations corresponding to thyroid, lung, heart, liver, spleen, and stomach.
