Erratum to: Ann Nucl Med DOI 10.1007/s12149-017-1171-6

The author would like to correct the errors in the publication of the original article. The correction details are given below for your reading:

The affiliation 5 should be deleted.

Owing to an error by the publisher, the Eq. (5) should have additional spaces among vector elements as below.

$$ \begin{aligned} \varvec{X} &= \left[ {\begin{array}{*{20}c} {\tilde{C}_{a} (t)} & {\int {\tilde{C}_{a} (t)\;{\text{d}}t} } & {\int {\tilde{C}_{T} (t)\;{\text{d}}t} } \\ \end{array} } \right] \hfill \\\varvec{\theta} & = \left[ {\begin{array}{*{20}c} {V_{a} } & {(1 - V_{a} )K_{1} + k_{2} V_{a} } & { - k_{2} } \\ \end{array} } \right]^{\varvec{T}} \hfill \\ \end{aligned} $$