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WANG CHUNCHIEH, LIN SHIHTSUNG, CHIU SHAOWEN, PAN LUNGFA, PAN LUNGKWANG. ASSESSMENT OF TC-99M MDP ABSORBED DOSE AND RESIDENCE TIME AFTER BONE SCAN EXAMINATION: PERSONAL DOSIMETER MEASUREMENTS AND SEMI-EMPIRICAL FORMULA FOR 210 PATIENTS IN TAIWAN. J MECH MED BIOL 2021. [DOI: 10.1142/s0219519421400753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Subject: This study assessed the absorbed dose for patients who underwent Tc-99m Methylene Diphosphonates (MDP) bone scan examination based on a series of personal dosimeter measurements and a derived semi-empirical formula. Material and methods: 210 volunteers among the patients, who were administrated 925 MBq Tc-99m MDP for the bone scan examination in the Department of Nuclear Medicine in the Dalin Tuzchi Hospital, Taiwan, underwent personal dosimeter measurements at 30, 120, and 180[Formula: see text]min after the injection. A personal dosimeter was held at a 30[Formula: see text]cm distance from the patient’s stomach. The acquired data were analyzed to derive the residence time of Tc-99m radionuclide in the patient’s body. Five biological parameters (gender, age, BMI, eGFR, and creatinine) of these 210 patients were collected and processed by the STATISTICA program, yielding a nonlinear 16-term first-order semi-empirical formula for the radionuclide residence time prediction. The respective four- and three-factor calculations, excluding creatinine and eGFR, provided poor correlation. Results and Conclusion: According to the phantom concept, treating a patient’s body as a homogenous spherical ball, a simplified formula was used to assess the absorbed dose rate and magnitude. Therefore, the derived residence time, dose rate, and absorbed dose were [Formula: see text][Formula: see text]min, [Formula: see text]Sv/min, and [Formula: see text]Sv, respectively. These results were lower than those obtained in previous studies, which can be attributed to accelerated radionuclide excretion of patients who drank 2000 cc of water after the procedure, yielding shorter residence times.
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Affiliation(s)
- CHUN-CHIEH WANG
- Department of Medical Imaging and Radiological Science, Central Taiwan University of Science and Technology, Takun, Taichung 406, Taiwan, ROC
- Puli Branch, Taichung Veterans General Hospital, Nantou 54552, Taiwan, ROC
| | - SHIH-TSUNG LIN
- Department of Medical Imaging and Radiological Science, Central Taiwan University of Science and Technology, Takun, Taichung 406, Taiwan, ROC
- Department of Nuclear Medicine, Buddhist Dalin Tuzchi Hospital, Dalin, Chiayi 622, Taiwan, ROC
| | - SHAO-WEN CHIU
- Department of Pet Healthcare, Yuanpei University of Medical Technology, Hsinchu 300, Taiwan, ROC
- Healthcare Technology Business Division, Healthcare Department, International Integrated Systems, Inc., Taipei 103, Taiwan, ROC
| | - LUNG-FA PAN
- Department of Medical Imaging and Radiological Science, Central Taiwan University of Science and Technology, Takun, Taichung 406, Taiwan, ROC
- Department of Cardiology, Taichung Armed Forces General Hospital, Taichung 411, Taiwan, ROC
| | - LUNG-KWANG PAN
- Department of Medical Imaging and Radiological Science, Central Taiwan University of Science and Technology, Takun, Taichung 406, Taiwan, ROC
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