The proposed method exploits the spectral properties of tissue hemoglobin for the purpose of 3D image reconstruction of quantum dot reporter probes inside scattering tissue. It advances fluorescence tomography in such way that only a single light source with tunable wavelength selection is required for fluorescence stimulation and image reconstruction. Numerical results suggest that current planar surface imaging technology could easily be retrofitted for performing fluorescence tomography without the use of elaborate source-detector multiplexing.