1 Correction to: Optical Review (2019) 26:111–117 https://doi.org/10.1007/s10043-018-0486-4

In the original publication, equations in Sects. 2.3 and 2.4 were published incorrectly. The corrected equations are given in this Correction.

$$ \begin{aligned} \Delta {\text{tHb}} &= ({\text{post-therapy tHb}} - {\text{baseline tHb}})/ \\ & \quad {\text{baseline tHb}} \times 100 \, \left( \% \right). \\ \end{aligned} $$
$$ \begin{aligned} \Delta {\text{tHb}}_{{{\text{net}}}} &= ({\text{post-therapy tHb}}_{{{\text{net}}}} - {\text{baseline tHb}}_{{{\text{net}}}} )/ \\ & \quad {\text{baseline tHb}}_{{{\text{net}}}} \times 100 \, \left( \% \right). \\ \end{aligned} $$
$$ \begin{aligned} \Delta {\text{SUV}}_{{{\text{max}}}} &= ({\text{post-therapy SUV}}_{{{\text{max}}}} - {\text{baseline SUV}}_{{{\text{max}}}} )/ \\ & \quad {\text{baseline SUV}}_{{{\text{max}}}} \times 100 \, \left( \% \right). \\ \end{aligned} $$

The original publication has been corrected.