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Table 3 Summary of the model evaluation for kidneys, tumors, liver spleen and bone marrow

From: Simple model for estimation of absorbed dose by organs and tumors after PRRT from a single SPECT/CT study

  Model evaluation
Solid organs and tumors
tf = t1 and ts = t1 tf = t2 and ts = t2 tf = t3 and ts = t3 tf = (t1, t2, t3) for model fitting
ts = t1 ts = t2 ts = t3
ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\)
Kidneys 32 0.85 28 0.96 32 0.95 32 0.84 28 0.95 32 0.93
Tumors 32 0.88 28 0.95 32 0.99 32 0.88 28 0.97 32 0.98
Liver 32 0.71 28 0.93 32 0.95 32 0.67 28 0.92 32 0.95
Spleen 31 0.92 27 0.98 31 0.99 31 0.93 27 0.95 31 0.99
  Bone marrow
tf = t1 and ts = t1 tf = t3 and ts = t3 tf = (t1, t3) for model fitting
ts = t1 ts = t3
ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\) ntest \({r}_{\mathrm{test}}^{2}\)
Bone marrow 31 0.91 31 0.97 31 0.87 31 0.96
  1. ntest represents the number of data considered for evaluation of the model. The time points tf and ts represent, respectively, the time considered for model training and for calculation of the absorbed dose using the MLR equation at tf. The coefficients of determination \({r}_{\mathrm{test}}^{2}\) are also shown