[Shielding effect of clinical X-ray protector and lead glass against annihilation radiation and gamma rays of 99mTc].
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.
Fukuda
Atsushi
A
Department of Radiology, Shiga Medical Center for Adults.
Koshida
Kichiro
K
Yamaguchi
Ichiro
I
Takahashi
Masaaki
M
Kitabayashi
Keitarou
K
Matsubara
Kousuke
K
Noto
Kimiya
K
Kawabata
Chikako
C
Nakagawa
Hiroto
H
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
D019788:Fluorodeoxyglucose F18; D007854:Lead