This article [J. Biomed. Opt. 17, 117005 (2012)] was originally published online on 7 November 2012 with an error on p. 2. The first matrix in the left column

$$\{A\}=\Vert \begin{array}{cc}\mathrm{cos}\text{\hspace{0.17em}}\theta & \mathrm{sin}\text{\hspace{0.17em}}\theta \\ -\mathrm{sin}\text{\hspace{0.17em}}\theta & \mathrm{cos}\text{\hspace{0.17em}}\theta \end{array}\Vert ,$$

has been replaced by $$\{Q\}=\Vert \begin{array}{ll}[{\mathrm{sin}}^{2}\text{\hspace{0.17em}}\rho +{\mathrm{cos}}^{2}\text{\hspace{0.17em}}\rho \text{\hspace{0.17em}}\mathrm{exp}(-i\delta )]& [\mathrm{sin}\text{\hspace{0.17em}}\rho \text{\hspace{0.17em}}\mathrm{cos}\text{\hspace{0.17em}}\rho (1-\mathrm{exp}(-i\delta ))]\\ [\mathrm{sin}\text{\hspace{0.17em}}\rho \text{\hspace{0.17em}}\mathrm{cos}\text{\hspace{0.17em}}\rho (1-\mathrm{exp}(-i\delta ))]& [{\mathrm{cos}}^{2}\text{\hspace{0.17em}}\rho +{\mathrm{sin}}^{2}\text{\hspace{0.17em}}\rho \text{\hspace{0.17em}}\mathrm{exp}(-i\delta )]\end{array}\Vert .$$

This article was corrected online on 21 November 2012. It appears correctly in print.