A Study of Optical Imaging With Light From Radiotracers in Cancer Patients

Inclusion Criteria: * Participant is 18 years of age or old * Participant must meet one of the following: * Patients with thyroid cancer scheduled for thyroid ablation therapy with 131I * Patients with any tumors with (existing or suspected) nodal metastases in the neck, supraclavicular, axillary and/or inguinal region who are scheduled to receive a clinical FDG PET/CT scan * Patients with metastatic prostate cancer who are schedule for Xofigo therapy with 223Ra * Patients scheduled to receive a standard of care 66Ga-DOTA-TATE or \[18f\]-PARPi PET scan in the Nuclear Medicine Clinic * Patient undergoing Lu-DOTA TATE treatment in the Nuclear Medicine Clinic Exclusion Criteria: * Patients imaged for Cerenkov luminescence are going to be required to be in a darkened enclosure for at least 10 minutes and sit still during image acquisition. Any conditions that would prevent this will exclude the patients. This includes patients who unable to sit in a dark environment, have claustrophobic, inability to sit still for a few minutes * Any other past medical, physiological or demographic concerns. This includes any patients with skin blemishes that are present at the dermis over the tumor, as these are of particular interest for use of this technique. This also includes open wounds on the area of interest.