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Table 1 Summary of the experiments

From: 166Holmium–99mTechnetium dual-isotope imaging: scatter compensation and automatic healthy-liver segmentation for 166Holmium radioembolization dosimetry

  Protocol 166Ho [MBq] 99mTc [MBq] Scans Reconstruction Aim Metric
Phantom 166Ho–99mTc dual isotope 250 25–126 8 166Ho Uniformity Coefficient of variation
Contrast Hot-sphere contrast recovery
Downscatter 166Ho count density
99mTc Uniformity Coefficient of variation
Contrast Cold-sphere contrast recovery
Segmentation Recovered volume
Sørensen-Dice index
99mTc only 0 8–240 42 99mTc Uniformity Coefficient of variation
Contrast Cold-sphere contrast recovery
Segmentation Recovered volume
Sørensen–Dice index
Patients 166Ho–99mTc dual isotope 224 (35)a 50 26 166Ho Downscatter 166Ho count density difference
166Ho-only 224 (35)a 0 26 166Ho
  1. aMedian (and interquartile range) of administered activity among patient scout procedures