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A Method for Validating PET and SPECT Cameras for Quantitative Clinical Imaging Trials Using Novel Radionuclides.
J Nucl Med
January 2025
Department of Nuclear Medicine, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia.
Our aim is to report methodology that has been developed to calibrate and verify PET and SPECT quantitative image accuracy and quality assurance for use with nonstandard radionuclides, especially with longer half-lives, in clinical imaging trials. Procedures have been developed for quantitative PET and SPECT image calibration for use in clinical trials. The protocol uses a 3-step approach: check quantitative accuracy with a previously calibrated radionuclide in a simple geometry, check the novel trial radionuclide in the same geometry, and check the novel radionuclide in a more challenging, complex geometry (the National Electrical Manufacturers Association [NEMA] NU-2 International Electrotechnical Commission [IEC] image-quality phantom).
View Article and Find Full Text PDFTreatment of Hyperthyroidism in Graves' Disease Complicated by Thyroid Eye Disease.
J Clin Endocrinol Metab
January 2025
Department of Ophthalmology and Visual Sciences and Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48105 USA.
Thyroid eye disease (TED) is the most consequential extrathyroidal manifestation or complication of Graves' disease (GD). Treatment of hyperthyroidism in GD complicated by TED is challenging. Antithyroid drugs (ATDs) and thyroidectomy do not change the natural course of TED, while radioactive iodine (RAI) is associated with a small but well-documented risk of TED de novo occurrence or its progression/worsening.
View Article and Find Full Text PDFDosimetric verification of point doses for I-125 implants designed by different manufacturers in prostate brachytherapy.
Rep Pract Oncol Radiother
December 2024
Department of Biomedical Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland.
Background: The purpose of this study is to determine the effect of the type of I-125 radioactive source on dose distribution in the planning process of ultra-low dose rate (uLDR) prostate brachytherapy.
Material And Methods: 7 patients who had undergone brachytherapy in our center were included in the study. Dose in five geometrical points were analyzed for 12 types of implants that are available on the market.
Networking in biological and physical retrospective dosimetry in Europe and beyond.
J Radiat Res
December 2024
Radiation Effects Department, UK Health Security Agency, Chilton, Didcot, Oxford OX11 ORQ, UK.
Ionizing radiation is of huge benefit to society; however, the risks of radiation overexposure in occupational settings or due to accidents or other incidents are of growing concern, not least due to the potential implications for exposed individuals in terms of acute high dose (e.g. ARS) and/or longer term low dose health effects such as cancer or genetic effects.
View Article and Find Full Text PDFAssessment of surface contamination of low-dose radioactive iodine (131I) treatment container.
Nucl Med Commun
December 2024
Department of Nuclear Medicine, CHA Bundang Medical Center, CHA University School of Medicine, Pocheon-si.
With the advancement of radiotherapy technology in the medical field, the amount of radioactive waste has rapidly increased, and the International Atomic Energy Agency (IAEA) has proposed waste deregulation standards based on individual dose, collective dose, and nuclide concentration. The purpose of this study is to define the standard period (1 day) required to measure collected radioactive waste using direct and indirect methods with a radioactivity meter, ensure that the radiation dose remains below the allowable level, and transport the waste safely. In this study, 131I low-dose (30 mCi) radioactive waste discarded after radioiodine treatment at a medical institution was collected, and a measuring container was prepared to measure radioactivity concentration according to IAEA standards.
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