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Table 2 Comparison between the planned therapeutic activity, the delivered therapeutic activity, the activity measured in the PET’s FOV, and the activity in the liver measured from PET

From: Analysis of differences between 99mTc-MAA SPECT- and 90Y-microsphere PET-based dosimetry for hepatocellular carcinoma selective internal radiation therapy

  Mean ± SD Absolute deviation Relative deviation
Planned therapeutic activity (MBq) 3673 ± 1387
Delivered therapeutic activity (MBq) 3525 ± 1225 − 148 ± 491 − 3 ± 9%
Activity measured in the PET’s FOV (MBq) 3301 ± 1162 − 372 ± 534 − 9 ± 12%
Activity in the liver measured from PET (MBq) 2663 ± 1002 − 1010 ± 579 −  27 ± 10%
  1. SD standard deviation, FOV field of view. All activities are given at the same time of injection. Deviation is computed with respect to the activity planned to be delivered