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Table 2 Angular coefficients a, Pearson’s coefficients r, and mean relative errors in cumulative doses from the standard calculation obtained for the kidneys, bone marrow, liver, spleen, and tumors when calculated using the three different “2 time-points protocols”

From: Dosimetry after peptide receptor radionuclide therapy: impact of reduced number of post-treatment studies on absorbed dose calculation and on patient management

Cumulative doses calculated with
 (t1, t2)(t1, t3)(t2, t3)
Kidneys1.8% ± 5.3%− 1.0% ± 2.4%− 2.3% ± 10.9%
r = 0.98r = 0.99r = 0.97
a = 1.02a = 1.00a = 0.97
Bone marrow− 0.8% ± 16.7%0.4% ± 3.1%− 1.7% ± 13.4%
r = 0.95r = 0.99r = 0.96
a = 1.35a = 1.00a = 0.90
Liver3.4% ± 22.8%− 0.9% ± 4.0%− 18.5% ± 24.4%
r = 0.97r = 0.99r = 0.93
a = 1.57a = 1.00a = 0.77
Spleen6.8% ± 6.9%− 0.8% ± 1.1%− 8.1% ± 9.8%
r = 0.99r = 0.99r = 0.98
a = 0.92a = 1.00a = 1.09
Tumors0.9% ± 19.1%− 0.5% ± 2.0%− 3.5% ± 15.1%
r = 0.96r = 0.99r = 0.90
a = 0.97a = 1.00a = 1.19