A new radiation shielding block material for radiation therapy
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Updated: Aug 20, 2026

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
Published on: February 6, 2019
Minoru Tajiri1, Masayoshi Sunaoka, Akifumi Fukumura
1Radiological Technology Office, National Institute of Radiological Sciences 4-9-1, Anagawa, Inage-ku, Chiba 263-8555, Japan. m_tajiri@nirs.go.jp
Abstract:
In recent years, lead has been recognized as a source of environmental pollution; this includes lead use for radiation shielding in radiotherapy. We looked for a new material that could be a lead substitute. We chose a material composed of tungsten and resin. We compared the attenuation coefficient of the material with those of lead and Lipowitz's metal, and found the material has a higher attenuation coefficient than the other two. The material may be used as a substitute for lead because it is easy to fabricate and friendly to the environment.
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