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Biomed Phys Eng Express ; 10(4)2024 May 15.
Article in English | MEDLINE | ID: mdl-38701767

ABSTRACT

Thermoluminescent dosimeters (TLDs) serve as compact and user-friendly tools for various applications, including personal radiation dosimetry and radiation therapy. This study explores the potential of utilizing TLD-100 personal dosimetry, conventionally applied in PET/CT (positron emission tomography/computed tomography) settings, in the PET/MRI (magnetic resonance imaging) environment. The integration of MRI into conventional radiotherapy and PET systems necessitates ionizing radiation dosimetry in the presence of static magnetic fields. In this study, TLD-100 dosimeters were exposed on the surface of a water-filled cylindrical phantom containing PET-radioisotope and positioned on the patient table of a 3 T PET/MRI, where the magnetic field strength is around 0.2 T, aiming to replicate real-world scenarios experienced by personnel in PET/MRI environments. Results indicate that the modified MR-safe TLD-100 personal dosimeters exhibit no significant impact from the static magnetic field of the 3 T PET/MRI, supporting their suitability for personal dosimetry in PET/MRI settings. This study addresses a notable gap in existing literature on the effect of MRI static magnetic field on TLDs.


Subject(s)
Magnetic Resonance Imaging , Occupational Exposure , Phantoms, Imaging , Thermoluminescent Dosimetry , Thermoluminescent Dosimetry/methods , Humans , Magnetic Resonance Imaging/methods , Occupational Exposure/analysis , Occupational Exposure/prevention & control , Positron Emission Tomography Computed Tomography/methods , Radiation Dosage , Positron-Emission Tomography/methods , Radiation Monitoring/methods , Magnetic Fields , Radiation Dosimeters
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