title: [Shielding effect of clinical X-ray protector and lead glass against annihilation radiation and gamma rays of 99mTc].
abstract: Various pharmaceutical companies in Japan are making radioactive drugs available for positron emission tomography (PET) in hospitals without a cyclotron. With the distribution of these drugs to hospitals, medical check-ups and examinations using PET are expected to increase. However, the safety guidelines for radiation in the new deployment of PET have not been adequately improved. Therefore, we measured the shielding effect of a clinical X-ray protector and lead glass against annihilation radiation and gamma rays of (99m)Tc. We then calculated the shielding effect of a 0.25 mm lead protector, 1 mm lead, and lead glass using the EGS4 (Electron Gamma Shower Version 4) code. The shielding effects of 22-mm lead glass against annihilation radiation and gamma rays of (99m)Tc were approximately 31.5% and 93.3%, respectively. The clinical X-ray protector against annihilation radiation approximately doubled the skin-absorbed dose.
authors.affiliation: Department of Radiology, Shiga Medical Center for Adults.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Fukuda
authors.forename: Kichiro
authors.initials: K
authors.lastname: Koshida
authors.forename: Ichiro
authors.initials: I
authors.lastname: Yamaguchi
authors.forename: Masaaki
authors.initials: M
authors.lastname: Takahashi
authors.forename: Keitarou
authors.initials: K
authors.lastname: Kitabayashi
authors.forename: Kousuke
authors.initials: K
authors.lastname: Matsubara
authors.forename: Kimiya
authors.initials: K
authors.lastname: Noto
authors.forename: Chikako
authors.initials: C
authors.lastname: Kawabata
authors.forename: Hiroto
authors.initials: H
authors.lastname: Nakagawa
mesh_terms: D019788:Fluorodeoxyglucose F18; D005898:Glass; D006801:Humans; D007854:Lead; D009010:Monte Carlo Method; D049268:Positron-Emission Tomography; D011481:Protective Clothing; D011835:Radiation Protection / Q000295:instrumentation*; D013679:Technology, Radiologic
chemical_list: D019788:Fluorodeoxyglucose F18; D007854:Lead