Fig. 1

Energy spectra using DNM 530c. Typical single ¹²³I, single ^99mTc, and simultaneous (¹²³I and ^99mTc) point source (1.7 MBq) energy spectra using DNM 530c without in-object scatter. Notice the low tailing effect and the down-scatter of ¹²³I towards ^99mTc in the dual isotope condition