Monitoring photodynamic therapy of head and neck malignancies with optical spectroscopies

Figure 2 Clinical multi-modal optical instrument for photodynamic therapy dosimetry and response monitoring. A: Picture of multi-modal clinical optical instrument; B: During the measurements at the operating room; C: Diagram of multi-modal clinical optical instrument; D: Interstitial optical probe for measurements in deep and thick tumors. Adapted from the reference[45] with the permission.