- OCT imaging: After identifying the abnormal areas for biopsy using WL and FV examination, the clinician will place a fiber-optic probe of the OCT on the oral mucosal areas of interest. The site for placement of the probe will be determined by PIs (Otolaryngology-head and neck surgeons (SD/DA) and/or Oral Medicine/Oral Pathology Specialist (Ng/Poh)). The images will be recorded by the machine for later analysis.