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ER calculated on the energy spectra curve as percentage of FWHM from peak position energy and its corresponding keV value. ER is better on DNM for all three isotopes
| Isotope | ER DNM, % (keV) | ER S-SPECT, % (keV) |
|---|---|---|
| 99mTc | 5.4 (7.6) | 9.4 (13.2) |
| 123I | 5.8 (9.2) | 9.0 (14.3) |
| 201Tl | 11.7 (8.2) | 13.4 (9.4) |
