A detailed investigation on Thyroid Nuclear Medicine Examinations and Organ Dose Assessment: A Monte Carlo Simulation Study

The importance of radionuclide dosimetry was that as nuclear medicine grew to include new therapeutic and diagnostic techniques as well as new radiopharmaceutical products. Dosimetry of radionuclide should be used for the purpose of planning radionuclide therapy as the dosimetry for external radiotherapy is used. In order to achieve nuclear therapy treatment planning, it is important to understand and distinguish between biological and dosimetry factors. Therefore, continuing improvements in dosimetry and codes are crucial in nuclear medicine to ensure that the role of dosimetry can be adequately evaluated in relation to biological factors. In this study, the VMC general-purpose Monte Carlo code has been utilized for the evaluation of absorbed organ doses from Technetium-99m applied in the Thyroid Gland scan. For this aim, radioactivity amounts of Technetium-99m have been changed from 5 mCi to 10 mCi, respectively. In each simulation run, the absorbed dose amount was recorded. The outcomes of recent investigation can be useful for the assessment of Technetium-99m radioactivity utilization Thyroid Gland scan considering the potential risks, cancer history, and general condition of the patient.