| MDPI | Multidisciplinary Digital Publishing Institute |
| OCT | Optical Coherence Tomography |
| SPR | Surface Plasmon Resonance |
| SS-OCT | Swept-Source Optical Coherence Tomography |
| FWHM | Full Width at Half Maximum |
| ICG | Indocyanine Green |
| NIR | Near-Infrared |
| NaYF4:Ho3+/Yb3+ | Sodium yttrium Fluoride doped with Holmium and Ytterbium |
| NaYF4:Ho3+/Yb3+@NaGdF4 | Core-Shell Sodium Yttrium Fluoride doped with Holmium and Ytterbium and Sodium Gadolinium Fluoride |
| DDA | Discrete Dipole Approximation |
| TEM | Transmission Electron Microscopy |
| HauCl4 | Gold(III) Chloride |
| Ag | Silver |
| µa | Absorption Coefficient |
| µs | Scattering Coefficient |
| µs’ | Reduced Scattering Coefficient |
| G | Avogadro’s Number |