The lead glass used in an X-ray examination room is indispensable for watching a subject being
tested or a situation of operation of an X-ray generator, but because it is some structure equipment
of an X-ray examination room, it must obey legal restrictions. Although the standard for lead
glass is determined by the International Electrotechnical Commission (IEC), there are few reports
about the characteristics related to interaction with radiation. We performed a comparison of
three lead glass products, which are principally used in world. As for three products, differences
are not looked by physics and chemical characteristics features. Simply the difference was looked
by the coloring characteristic for an interaction with radiation. Furthermore, we checked that
temporal decolorization of coloring had two half-lives. The short half-life is about 28 hours and
the long half-life is about 107 days.
References
[1]
National Council of Radiation Protection and Measurements (2004) NCRP Report No. 145, Radiation Protection in Dentistry.
[2]
National Council of Radiation Protection and Measurements (2005) NCRP Report No. 147, Structural Shielding Design for Medical X-Ray Imaging Facilities.
[3]
International Electrotechnical Commission (2011) IEC 61331-2 Protective Devices against Diagnostic Medical X- Radiation—Part 2, Translucent Protective Plates.
[4]
Kakuno, K. (2009) Lectures for Newcomers and Leaders: Optical Properties of Glasses (2). New Glass, 24, 66-72.
[5]
Uhlmann, D.R., et al., Eds. (1991) Optical Properties of Glass. The American Ceramic Society, Inc., New York.
[6]
Maekoshi, H. (1995) Supervision Radiological Technology Studies Library (11), Photon Attenuation Coefficient Datebook. Japanese Society of Radiological Technology, Kyoto.
[7]
Kakuno, K. (2009) Lectures for Newcomers and Leaders: Optical Properties of Glasses (1). New Glass, 24, 59-63.
[8]
NEW GLASS Handbook Editing Committee Edition (1991) NEW GLASS Handbook. Maruzen Co., Ltd., Tokyo.
[9]
Aggarwal, I.D., et al., Eds. (1991) Fluoride Glass Fiber Optics. Academic Press, Inc., New York.
