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Table 1 Energy window settings

From: Simultaneous Tc-99m and I-123 dual-radionuclide imaging with a solid-state detector-based brain-SPECT system and energy-based scatter correction

Window keV
Tc-lower 120–130
Tc-main 130–148
Intermediate (Tc-upper and I-lower) 150–155
I-main 155–170
I-upper 170–180