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Iranian Journal of Nuclear Medicine، جلد ۳۳، شماره ۲، صفحات ۸۵-۹۶
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عنوان انگلیسی Radiation absorbed dose evaluation of [153Sm]Sm-DOTMP radiopharmaceutical based on biodistribution data in Wistar rats
چکیده انگلیسی مقاله Introduction: Bone metastases are a frequent complication in various tumors such as prostate, breast, and lung carcinoma often causing progressive pain. Bone-seeking beta-emitting radiopharmaceuticals such as samarium-153-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetramethylene phosphonic acid ([153Sm]Sm-DOTMP) are potentially utilized for bone pain palliation.
Methods: This research evaluated the radiation absorbed dose of [153Sm]Sm-DOTMP radiopharmaceutical for adult men based on biodistribution data in Wistar rats. The Medical Internal Radiation Dosimetry (MIRD) dose calculation method and the Sparks and Aydogan methodology were applied.
Results: About 56% of the injected activity is accumulated on the surface of the trabecular and compact bones. Radiation absorbed doses of red bone marrow and osteogenic cells were estimated at 0.66±0.04 and 3.43±0.23 mGy/MBq, respectively. The maximum administrated activity was obtained at 43.3 MBq/kg (1.17 mCi/kg) of body weight with about 10.4 Gy absorbed dose of bone surface for a 70 kg adult man. The effective dose of [153Sm]Sm-DOTMP radiopharmaceutical was estimated at 0.14±0.01 mSv/MBq and the urinary bladder wall and kidneys absorbed doses were evaluated at about 0.20±0.02 mGy/MBq and 0.05±0.01 mGy/MBq, respectively. The urinary and gastrointestinal tracts were the next organs with the highest radiation absorbed dose as the main routes of excretion of radioactivity.
Conclusion: This study showed that the radiopharmaceutical [153Sm]Sm-DOTMP can provide palliative care for bone metastases while delivering low undesired doses to surrounding normal tissues.
کلیدواژه‌های انگلیسی مقاله [153Sm]Sm-DOTMP,Bone metastasis,Radiation absorbed dose,MIRD method,effective dose
نویسندگان مقاله Reza Bagheri |
Radiation Applications Research School, Nuclear Science and Technology Research Institute, Tehran, Iran

Hassan Ranjbar |
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran

نشانی اینترنتی http://irjnm.tums.ac.ir/article_40438_2f3f5c1d8ea2a5d91bb24e72d4e1b704.pdf
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